XCL205/XCL206/XCL207 Series ETR2801-011 Inductor Built-in Step-Down "micro DC/DC" Converters GreenOperation Compatible GENERAL DESCRIPTION The XCL205/XCL206/XCL207 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC in one tiny package (2.5mmx2.0mm, H=1.0mm). A stable power supply with an output current of 600mA is configured using only two capacitors connected externally. Operating voltage range is from 2.0V to 6.0V(XCL20xG:1.8V6.0V). Output voltage is internally set in a range from 0.8V to 4.0V in increments of 0.05V. The device is operated by 3.0MHz, and includes 0.42P-channel driver transistor and 0.52 N-channel switching transistor. As for operation mode, the XCL205 series is PWM control, the XCL206 series is automatic PWM/PFM switching control and the XCL207 series can be manually switched between the PWM control mode and the automatic PWM/PFM switching control mode, allowing fast response, low ripple and high efficiency over the full range of loads (from light load to heavy load). During stand-by, the device is shutdown to reduce current consumption to as low as 1.0A or less. With the built-in UVLO (Under Voltage Lock Out) function, the internal driver transistor is forced OFF when input voltage becomes 1.4V or lower. XCL205B(G)/XCL206B(G)/XCL207B(G) series provide short-time turn-on by the soft start function internally set in 0.25 ms (TYP). XCL205B(C,G) /XCL206 B(C,G) / XCL207B(C,G) integrate CL auto discharge function which enables the electric charge stored at the output capacitor CL to be discharged via the internal auto-discharge switch located between the LX and VSS pins. When the devices enter stand-by mode, output voltage quickly returns to the VSS level as a result of this function. FEATURES APPLICATIONS Ultra Small Input Voltage Mobile phones, Smart phones Bluetooth Headsets Output Voltage High Efficiency Output Current Oscillation Frequency Maximum Duty Cycle Capacitor CE Function WiMAX PDAs, MIDs, UMPCs Portable game consoles Digital cameras, Camcorders Electronic dictionaries Protection Circuits Control Methods Operating Ambient Temperature Environmentally Friendly TYPICAL APPLICATION CIRCUIT XCL205/206/207 Series : 2.5mmx2.0mm, H=1.0mm : 2.0V ~ 6.0V(A/B/C Type) 1.8V ~ 6.0V(G Type) : 0.8V ~ 4.0V (+2.0%) : 90% (VIN=4.2V, VOUT=3.3V) : 600mA : 3.0MHz (+15%) : 100% : Low ESR Ceramic : Active High Soft-Start Circuit Built-In CL High Speed Auto Discharge :Current Limiter Circuit Built-In (Constant Current & Latching) : PWM (XCL205) PWM/PFM Auto (XCL206) PWM/PFM Manual (XCL207) : -40+85 : EU RoHS Compliant, Pb Free TYPICAL PERFORMANCE CHARACTERISTICS XCL205A333xx/XCL206A333xx/XCL207A333xx 100 L1 CL 10F 80 VIN Vss Vss VOUT CE/MODE CIN 4.7F 600mA L2 Efficency:EFFI(%) LX XCL206/XCL207(PWM/PFM) 60 VIN= 5.5V 5.0V 4.2V 40 XCL205/XCL207 (PWM) 20 VOUT=3.3V (TOP VIEW) * "L1 and LX", and "L2 and VOUT" is connected by wiring. 0 0.1 1 10 100 1000 Output Current:IOUT (mA) 1/25 XCL205/XCL206/XCL207 Series PIN CONFIGURATION L1 7 VIN 6 1 Lx Vss 5 2 Vss * It should be connected the VSS pin (No. 2 and 5) to the GND pin. * If the dissipation pad needs to be connected to other pins, it should be connected to the GND pin. CE/MODE 4 3 VOUT * Please refer to pattern layout page for the connecting to PCB. 8 L2 (BOTTOM VIEW) PIN ASSIGNMENT PIN NUMBER PIN NAME FUNCTION 1 2,5 3 4 6 7 8 Lx VSS VOUT CE / MODE VIN L1 L2 Switching Output Ground Output Voltage Chip Enable & Mode Switch Power Input Inductor Electrodes PRODUCT CLASSIFICATION Ordering Information XCL205-(*1) Fixed PWM control XCL206-(*1) PWM / PFM automatic switching control XCL207-(*1) Manual Mode Selection Pin (Semi-custom) DESIGNATOR (*1) (*2) ITEM SYMBOL Functions selection (All CE active high) Output Voltage (*2) Oscillation Frequency -(*1) Package (Order Unit) A B C G 10 12 14 15 1K 18 19 25 28 2L 30 33 3 AR-G DESCRIPTION VIN2.0V, No CL auto discharge, Standard soft-start VIN2.0V, CL auto discharge, High speed soft-start VIN2.0V, CL auto discharge, Standard soft-start VIN1.8V, CL auto discharge, High speed soft-start 1.0V 1.2V 1.4V 1.5V 1.75V 1.8V 1.9V 2.5V 2.8V 2.85V 3.0V 3.3V 3.0MHz CL-2025 (3,000/Reel) The "-G" suffix denotes Halogen and Antimony free as well as being fully RoHS compliant. When other output voltages are needed, please contact your local Torex sales office for more information. Output voltage range is 0.8~4.0V. 2/25 XCL205/XCL206/XCL207 Series BLOCK DIAGRAM XCL205 / XCL206 / XCL207 series A Type L2 L1 Inductor Phase Compensation VOUT Current Feedback Current Limit CFB R2 Error Amp. PWM Comparator FB Synch Buffer Drive Logic R1 VIN Lx VSHORT Vref with Soft Start, CE PWM/PFM Selector VSS Ramp Wave Generator OSC UVLO Cmp UVLO VSS R3 CE/MODE Control Logic R4 CE/MODE NOTE: The XCL205 offers a fixed PWM control, a signal from CE/MODE Control Logic to PWM/PFM Selector is fixed to "L" level inside. The XCL206 control scheme is PWM/PFM automatic switching, a signal from CE/MODE Control Logic to PWM/PFM Selector is fixed to "H" level inside. The diodes placed inside are ESD protection diodes and parasitic diodes. XCL205 / XCL206 / XCL207 / XCL205 / XCL206 / XCL207 series B/C/G Type L2 L1 Inductor Phase Compensation VOUT Current Feedback Current Limit CFB R2 Error Amp. PWM Comparator FB Logic R1 VIN Synch Buffer Drive Lx VSHORT Vref with Soft Start, CE PWM/PFM Selector VSS UVLO Cmp VSS Ramp Wave Generator OSC CE/ UVLO R3 CE/MODE Control Logic R4 CE/MODE NOTE: The XCL205 offers a fixed PWM control, a signal from CE/MODE Control Logic to PWM/PFM Selector is fixed to "L" level inside. The XCL206 control scheme is PWM/PFM automatic switching, a signal from CE/MODE Control Logic to PWM/PFM Selector is fixed to "H" level inside. The diodes placed inside are ESD protection diodes and parasitic diodes. ABSOLUTE MAXIMUM RATINGS Ta = 25 PARAMETER SYMBOL RATINGS UNITS VIN Pin Voltage LX Pin Voltage VOUT Pin Voltage CE/MODE Pin Voltage LX Pin Current Power Dissipation Operating Ambient Temperature Storage Temperature VIN VLX VOUT VCE ILX Pd Topr Tstg VSS- 0.3 ~VSS +6.5 V V V V mA mW VSS- 0.3 ~ VIN + 0.3VSS+6.5 VSS- 0.3 ~VSS +6.5 VSS- 0.3 ~VSS +6.5 1500 1000*1 - 40 ~ + 85 - 40 ~ + 105 *1: The power dissipation figure shown is PCB mounted (40mmx40mm, t=1.6mm, Glass Epoxy FR-4). Please refer to page 16 for details. 3/25 XCL205/XCL206/XCL207 Series ELECTRICAL CHARACTERISTICS XCL205Axx3AR/XCL206Axx3AR/XCL207Axx3AR, fOSC=3.0MHz, Ta=25 PARAMETER SYMBOL Output Voltage VOUT Operating Voltage Range VIN CONDITIONS When connected to external components, VIN=VCE=5.0V, IOUT=30mA Maximum Output Current IOUTMAX VIN=VOUT(T)+2.0V, VCE=1.0V (*9) When connected to external components UVLO Voltage VUVLO VCE=VIN,VOUT=0V, (*1, *11) Voltage which Lx pin holding "L" level Supply Current (XCL205) Supply Current (XCL206, XCL207) Stand-by Current Oscillation Frequency (*12) PFM Switching Current PFM Duty Limit (*12) IDD VIN=VCE=5.0V, VOUT=VOUT(T)x1.1V MIN. TYP. MAX. UNITS CIRCUIT <E-1> <E-2> <E-3> V 2.0 - 6.0 V 600 - - mA 1.00 1.40 1.78 V - 46 65 - 21 35 A ISTB VIN=5.0V, VCE=0V, VOUT=VOUT(T)x1.1V - 0 1.0 A fOSC When connected to external components, VIN=VOUT(T)+2.0V,VCE=1.0V, IOUT=100mA 2550 3000 3450 kHz IPFM When connected to external components, VIN=VOUT(T)+2.0V, VCE=VIN , IOUT=1mA <E-4> <E-5> <E-6> mA DTYLIMIT_PFM VCE= VIN= VOUT(T) +1.0V, IOUT=1mA - 200 300 % Maximum Duty Cycle DMAX VIN=VCE=5.0V, VOUT=VOUT (T)x0.9V 100 - - % Minimum Duty Cycle DMIN VIN=VCE=5.0V, VOUT=VOUT (T)x1.1V - - 0 % <E-7> - % 0.35 0.42 0.45 0.52 0.01 0.01 1050 0.55 0.67 0.66 0.77 1.0 1.0 1350 A A mA 100 - ppm/ - VIN V - 0.25 V - VIN - 1.0 V - - V - 0.1 0.1 A A 0.9 2.5 ms - 20 ms V (*2) Efficiency EFFI Lx SW "H" ON Resistance 1 RLH Lx SW "H" ON Resistance 2 RLH Lx SW "L" ON Resistance 1 RLL Lx SW "L" ON Resistance 2 RLL (*5) Lx SW "H" Leakage Current ILEAKH (*5) Lx SW "L" Leakage Current ILEAKL (*10) Current Limit ILIM Output Voltage VOUT/ (VOUTTopr) Temperature Characteristics CE "H" Voltage VCEH CE "L" Voltage VCEL PWM "H" Level Voltage (*13) VPWMH PWM "L" Level Voltage (*13) VPWML CE "H" Current CE "L" Current ICEH ICEL Soft Start Time tSS Latch Time tLAT Short Protection Threshold Voltage VSHORT Inductance Value Allowed Inductor Current L IDC When connected to external components, VCE=VINVOUT (T)+1.2V, IOUT = 100mA (*3) VIN=VCE=5.0V, VOUT=0V, ILX=100mA (*3) VIN=VCE=3.6V, VOUT=0V, ILX=100mA (*4) VIN=VCE=5.0V (*4) VIN=VCE=3.6V, VIN=VOUT=5.0V, VCE=0V, LX=0V VIN=VOUT=5.0V, VCE=0V, LX= 5.0V (*8) VIN=VCE=5.0V, VOUT=VOUT(T)x0.9V 900 IOUT =30mA -40Topr85 VOUT=0V, Applied voltage to VCE, 0.65 (*11) Voltage changes Lx to "H" level VOUT=0V, Applied voltage to VCE, VSS (*11) Voltage changes Lx to "L" level When connected to external components, (*6), IOUT=1mA Voltage which oscillation (*13) frequency becomes 2550kHzfOSC3450kHz When connected to external components, VIN (*6) IOUT=1mA , Voltage which oscillation 0.25 (*13) frequency becomes fOSC2550kHz VIN=VCE=5.0V, VOUT=0V - 0.1 VIN=5.0V, VCE=0V, VOUT=0V - 0.1 When connected to external components, 0.5 VCE=0VVIN , IOUT=1mA VIN=VCE=5.0V, VOUT=0.8xVOUT(T) 1.0 (*7) Short Lx at 1 resistance Sweeping VOUT, VIN=VCE=5.0V, Short Lx at 1 resistance, VOUT voltage which Lx becomes "L" <E-8> level within 1ms Test frequency=1MHz T=40 - <E-9> <E-10> 1.5 1000 - H mA Test conditions: Unless otherwise stated, VIN=5.0V, VOUT(T)=Nominal Voltage NOTE: *1: Including hysteresis operating voltage range. *2: EFFI = { ( output voltagexoutput current ) / ( input voltagexinput current) }x100 *3: ON resistance ()= (VIN - Lx pin measurement voltage) / 100mA *4: Design value *5: When temperature is high, a current of approximately 10A (maximum) may leak. *6: The CE/MODE pin of the XCL207 series works also as an external switching pin of PWM control and PWM/PFM control. When the IC is in the operation, control is switched to the automatic PWM/PFM switching mode when the CE/MODE pin voltage is equal to or greater than VIN minus 0.3V, and to the PWM mode when the CE/MODE pin voltage is equal to or lower than VIN minus 1.0V and equal to or greater than VCEH. *7: Time until it short-circuits VOUT with GND via 1of resistor from an operational state and is set to Lx=0V from current limit pulse generating. *8: When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance. *9: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes. If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance. *10: Current limit denotes the level of detection at peak of coil current. *11: "H"=VIN~VIN-1.2V, "L"=+0.1V~-0.1V *12: IPFM and DTYLIMIT_PFM are defined only for the XCL206 and XCL207 series which have PFM control function. (Not for the XCL 205 series) *13: VPWMH and VPWML are defined only for the XCL207 series. (They are not used in the XCL205/and XCL206 series) 4/25 XCL205/XCL206/XCL207 Series ELECTRICAL CHARACTERISTICS (Continued) XCL205Bxx3AR/XCL206Bxx3AR/XCL207Bxx3AR, fOSC=3.0MHz, Ta=25 PARAMETER SYMBOL Output Voltage VOUT Operating Voltage Range VIN Maximum Output Current IOUTMAX UVLO Voltage VUVLO Supply Current (XCL205) CONDITIONS When connected to external components, VIN=VCE=5.0V, IOUT=30mA VIN=VOUT(T)+2.0V, VCE=1.0V (*9) When connected to external components VCE=VIN,VOUT=0V, (*1, *11) Voltage which Lx pin holding "L" level Supply Current (XCL206, XCL207) Stand-by Current IDD VIN=VCE=5.0V, VOUT=VOUT(T)x1.1V ISTB Oscillation Frequency fOSC VIN=5.0V, VCE=0V, VOUT=VOUT(T)x1.1V When connected to external components, VIN =VOUT(T)+2.0V,VCE=1.0V, IOUT=100mA When connected to external components, VIN =VOUT(T)+2.0V, VCE = VIN , IOUT=1mA (*12) PFM Switching Current (*12) IPFM MIN. TYP. MAX. UNITS CIRCUIT <E-1> <E-2> <E-3> V 2.0 - 6.0 V 600 - - mA 1.00 1.40 1.78 V - 46 65 - 21 35 A - 0 1.0 A 2550 3000 3450 kHz <E-4> <E-5> <E-6> mA DTYLIMIT_PFM VCE=VIN= VOUT(T) +1.0V, IOUT=1mA - 200 300 % Maximum Duty Cycle DMAX VIN=VCE=5.0V, VOUT=VOUT (T)x0.9V 100 - - % Minimum Duty Cycle DMIN VIN=VCE=5.0V, VOUT=VOUT (T)x1.1V When connected to external components, VCE=VINVOUT (T)+1.2V, IOUT=100mA (*3) VIN=VCE=5.0V, VOUT=0V, ILX=100mA (*3) VIN=VCE=3.6V, VOUT=0V, ILX=100mA (*4) VIN=VCE=5.0V (*4) VIN=VCE = 3.6V VIN=VOUT=5.0V, VCE =0V, LX=0V (*8) VIN=VCE=5.0V, VOUT=VOUT (T)x0.9V IOUT =30mA -40Topr85 VOUT=0V, Applied voltage to VCE, (*11) Voltage changes Lx to "H" level VOUT=0V, Applied voltage to VCE, (*11) Voltage changes Lx to "L" level When connected to external components, (*6), IOUT=1mA Voltage which oscillation (*13) frequency becomes 2550kHzfOSC3450kHz When connected to external components, (*6) IOUT=1mA , Voltage which oscillation (*13) frequency becomes fOSC2550kHz VIN=VCE=5.0V, VOUT=0V VIN=5.0V, VCE=0V, VOUT=0V When connected to external components, VCE=0VVIN , IOUT=1mA VIN=VCE=5.0V, VOUT=0.8xVOUT(T) (*7) Short Lx at 1 resistance Sweeping VOUT, VIN=VCE=5.0V, Short Lx at 1 resistance, VOUT voltage which Lx becomes "L" level within 1ms VIN=5.0V, LX=5.0V, VCE=0V, VOUT=Open Test frequency =1MHz T=40 - - 0 % - <E-7> - % 900 0.35 0.42 0.45 0.52 0.01 1050 0.55 0.67 0.66 0.77 1.0 1350 A mA - 100 - ppm/ 0.65 - VIN V VSS - 0.25 V - - VIN - 1.0 V VIN 0.25 - - V - 0.1 - 0.1 - 0.1 0.1 A A ms ms V H mA PFM Duty Limit (*2) Efficiency EFFI Lx SW "H" ON Resistance 1 RLH Lx SW "H" ON Resistance 2 RLH Lx SW "L" ON Resistance 1 RLL Lx SW "L" ON Resistance 2 RLL (*5) Lx SW "H" Leakage Current ILEAKH (*10) Current Limit ILIM Output Voltage VOUT/ Temperature Characteristics (VOUTTopr) CE "H" Voltage VCEH CE "L" Voltage VCEL PWM "H" Level Voltage (*13) VPWMH PWM "L" Level Voltage (*13) VPWML CE "H" Current CE "L" Current ICEH ICEL Soft Start Time tSS Latch Time tLAT Short Protection Threshold Voltage VSHORT CL Discharge Inductance Value Allowed Inductor Current RDCHG L IDC 1.0 <E-8> 200 - <E-11> <E-12> - 20 <E-9> <E-10> 300 1.5 1000 450 - Test conditions: Unless otherwise stated, VIN=5.0V, VOUT (T) =Nominal Voltage NOTE: *1: Including hysteresis operating voltage range. *2: EFFI = { ( output voltagexoutput current ) / ( input voltagexinput current) }x100 *3: ON resistance ()= (VIN - Lx pin measurement voltage) / 100mA *4: Design value *5: When temperature is high, a current of approximately 10A (maximum) may leak. *6: The CE/MODE pin of the XCL207 series works also as an external switching pin of PWM control and PWM/PFM control. When the IC is in the operation, control is switched to the automatic PWM/PFM switching mode when the CE/MODE pin voltage is equal to or greater than VIN minus 0.3V, and to the PWM mode when the CE/MODE pin voltage is equal to or lower than VIN minus 1.0V and equal to or greater than VCEH. *7: Time until it short-circuits VOUT with GND via 1of resistor from an operational state and is set to Lx=0V from current limit pulse generating. *8: When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance. *9: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes. If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance. *10: Current limit denotes the level of detection at peak of coil current. *11: "H"=VIN~VIN-1.2V, "L"=+0.1V~-0.1V *12: IPFM and DTYLIMIT_PFM are defined only for the XCL206 and XCL207 series which have PFM control function. (Not for the XCL 205 series) *13: VPWMH and VPWML are defined only for the XCL207 series. (They are not used in the XCL205/and XCL206 series) 5/25 XCL205/XCL206/XCL207 Series ELECTRICAL CHARACTERISTICS (Continued) XCL205Cxx3AR/XCL206Cxx3AR/XCL207Cxx3AR, fOSC=3.0MHz, Ta=25 PARAMETER SYMBOL Output Voltage VOUT Operating Voltage Range VIN Maximum Output Current IOUTMAX UVLO Voltage VUVLO Supply Current (XCL205) CONDITIONS When connected to external components, VIN = VCE =5.0V, IOUT =30mA VIN=VOUT(T)+2.0V, VCE=1.0V (*9) When connected to external components VCE=VIN,VOUT=0V, (*1, *11) Voltage which Lx pin holding "L" level IDD VIN =VCE=5.0V, VOUT= VOUT(T)x1.1V Stand-by Current ISTB Oscillation Frequency fOSC VIN =5.0V, VCE=0V, VOUT= VOUT(T)x1.1V When connected to external components, VIN =VOUT(T)+2.0V,VCE=1.0V, IOUT=100mA When connected to external components, VIN =VOUT(T)+2.0V, VCE = VIN , IOUT=1mA Supply Current (XCL206, XCL207) (*12) PFM Switching Current PFM Duty Limit (*12) IPFM DTYLIMIT_PFM VCE= VIN = VOUT(T) +1.0V, IOUT=1mA Maximum Duty Cycle MAXDTY VIN = VCE =5.0V, VOUT = VOUT (T)x0.9V Minimum Duty Cycle MINDTY VIN = VCE =5.0V, VOUT = VOUT (T)x1.1V When connected to external components, VCE = VIN VOUT (T)+1.2V, IOUT = 100mA (*3) VIN = VCE = 5.0V, VOUT = 0V,ILX = 100mA (*3) VIN = VCE = 3.6V, VOUT = 0V,ILX = 100mA (*4) VIN = VCE = 5.0V (*4) VIN = VCE = 3.6V VIN= VOUT =5.0V, VCE =0V, LX=0V (*8) VIN = VCE= 5.0V, VOUT = VOUT (T)x0.9V IOUT =30mA -40Topr85 VOUT=0V, Applied voltage to VCE, (*11) Voltage changes Lx to "H" level VOUT=0V, Applied voltage to VCE, (*11) Voltage changes Lx to "L" level When connected to external components, (*6), IOUT=1mA Voltage which oscillation (*13) frequency becomes 2550kHzfOSC3450kHz When connected to external components, (*6) IOUT=1mA , Voltage which oscillation (*13) frequency becomes fOSC2550kHz VIN = VCE =5.0V, VOUT = 0V VIN =5.0V, VCE = 0V, VOUT = 0V When connected to external components, VCE=0VVIN , IOUT=1mA VIN=VCE=5.0V, VOUT=0.8xVOUT(T) (*7) Short Lx at 1 resistance Sweeping VOUT, VIN=VCE=5.0V, Short Lx at 1 resistance, VOUT voltage which Lx becomes "L" level within 1ms VIN = 5.0V LX = 5.0V VCE = 0V VOUT = open Test frequency=1MHz T=40 (*2) Efficiency EFFI Lx SW "H" ON Resistance 1 RLH Lx SW "H" ON Resistance 2 RLH Lx SW "L" ON Resistance 1 RLL Lx SW "L" ON Resistance 2 RLL (*5) Lx SW "H" Leakage Current ILEAKH (*10) Current Limit ILIM Output Voltage VOUT/ (VOUTTopr) Temperature Characteristics CE "H" Voltage VCEH CE "L" Voltage VCEL PWM "H" Level Voltage (*13) VPWMH PWM "H" Level Voltage (*13) VPWML CE "H" Current CE "L" Current ICEH ICEL Soft Start Time tSS Latch Time tLAT Short Protection Threshold Voltage VSHORT CL Discharge Inductance Value Allowed Inductor Current RDCHG L IDC MIN. TYP. MAX. <E-1> <E-2> <E-3> V 2.0 - 6.0 V 600 - - mA 1.00 1.40 1.78 V A - UNITS CIRCUIT 46 65 21 35 - 0 1.0 A 2550 3000 3450 kHz <E-4> <E-5> <E-6> mA - 200 300 % 100 - - % - - 0 % - <E-7> - % 900 0.35 0.42 0.45 0.52 0.01 1050 0.55 0.67 0.66 0.77 1.0 1350 A mA - 100 - ppm/ 0.65 - 6.0 V VSS - 0.25 V - - VIN - 1.0 V VIN 0.25 - - V - 0.1 - 0.1 - 0.1 0.1 A A 0.5 0.9 2.5 ms 1.0 - 20 ms V H mA - <E-8> 200 - <E-9> <E-10> 300 1.5 1000 450 - Test conditions: Unless otherwise stated, VIN=5.0V, VOUT (T) = Nominal Voltage NOTE: *1: Including hysteresis operating voltage range. *2: EFFI = { ( output voltagexoutput current ) / ( input voltagexinput current) }x100 *3: ON resistance ()= (VIN - Lx pin measurement voltage) / 100mA *4: Design value *5: When temperature is high, a current of approximately 10A (maximum) may leak. *6: The CE/MODE pin of the XCL207 series works also as an external switching pin of PWM control and PWM/PFM control. When the IC is in the operation, control is switched to the automatic PWM/PFM switching mode when the CE/MODE pin voltage is equal to or greater than VIN minus 0.3V, and to the PWM mode when the CE/MODE pin voltage is equal to or lower than VIN minus 1.0V and equal to or greater than VCEH. *7: Time until it short-circuits VOUT with GND via 1of resistor from an operational state and is set to Lx=0V from current limit pulse generating. *8: When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance. *9: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes. If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance. *10: Current limit denotes the level of detection at peak of coil current. *11: "H"=VIN~VIN-1.2V, "L"=+0.1V~-0.1V *12: IPFM and DTYLIMIT_PFM are defined only for the XCL206 and XCL207 series which have PFM control function. (Not for the XCL 205 series) *13: VPWMH and VPWML are defined only for the XCL207 series. (They are not used in the XCL205/and XCL206 series) 6/25 XCL205/XCL206/XCL207 Series ELECTRICAL CHARACTERISTICS (Continued) XCL205Gxx3AR/XCL206Gxx3AR/XCL207Gxx3AR, fOSC=3.0MHz, Ta=25 PARAMETER SYMBOL Output Voltage VOUT Operating Voltage Range VIN Maximum Output Current IOUTMAX UVLO Voltage VUVLO Supply Current (XCL205) CONDITIONS When connected to external components, VIN = VCE =5.0V, IOUT =30mA VIN=VOUT(T)+2.0V, VCE=1.0V (*9) When connected to external components (*14) VCE=VIN,VOUT(T)x0.5V , (*1, *11) Voltage which Lx pin holding "L" level IDD VIN =VCE=5.0V, VOUT= VOUT(T)x1.1V Stand-by Current ISTB Oscillation Frequency fOSC VIN =5.0V, VCE=0V, VOUT= VOUT(T)x1.1V When connected to external components, VIN =VOUT(T)+2.0V,VCE=1.0V, IOUT=100mA When connected to external components, VIN =VOUT(T)+2.0V, VCE = VIN , IOUT=1mA Supply Current (XCL206, XCL207) (*12) PFM Switching Current PFM Duty Limit (*12) IPFM DTYLIMIT_PFM VCE= VIN = VOUT(T) +1.0V, IOUT=1mA Maximum Duty Cycle MAXDTY VIN = VCE =5.0V, VOUT = VOUT (T)x0.9V Minimum Duty Cycle MINDTY VIN = VCE =5.0V, VOUT = VOUT (T)x1.1V When connected to external components, VCE = VIN VOUT (T)+1.2V, IOUT = 100mA (*3) VIN = VCE = 5.0V, VOUT = 0V,ILX = 100mA (*3) VIN = VCE = 3.6V, VOUT = 0V,ILX = 100mA (*4) VIN = VCE = 5.0V (*4) VIN = VCE = 3.6V VIN= VOUT =5.0V, VCE =0V, LX=0V (*8) VIN = VCE= 5.0V, VOUT = VOUT (T)x0.9V IOUT =30mA -40Topr85 VOUT=0V, Applied voltage to VCE, (*11) Voltage changes Lx to "H" level VOUT=0V, Applied voltage to VCE, (*11) Voltage changes Lx to "L" level When connected to external components, (*6), IOUT=1mA Voltage which oscillation (*13) frequency becomes 2550kHzfOSC3450kHz When connected to external components, (*6) IOUT=1mA , Voltage which oscillation (*13) frequency becomes fOSC2550kHz VIN = VCE =5.0V, VOUT = 0V VIN =5.0V, VCE = 0V, VOUT = 0V When connected to external components, VCE=0VVIN , IOUT=1mA VIN=VCE=5.0V, VOUT=0.8xVOUT(T) (*7) Short Lx at 1 resistance Sweeping VOUT, VIN=VCE=5.0V, Short Lx at 1 resistance, VOUT voltage which Lx becomes "L" level within 1ms VIN = 5.0V LX = 5.0V VCE = 0V VOUT = open Test frequency=1MHz T=40 (*2) Efficiency EFFI Lx SW "H" ON Resistance 1 RLH Lx SW "H" ON Resistance 2 RLH Lx SW "L" ON Resistance 1 RLL Lx SW "L" ON Resistance 2 RLL (*5) Lx SW "H" Leakage Current ILEAKH (*10) Current Limit ILIM Output Voltage VOUT/ (VOUTTopr) Temperature Characteristics CE "H" Voltage VCEH CE "L" Voltage VCEL PWM "H" Level Voltage (*13) VPWMH PWM "H" Level Voltage (*13) VPWML CE "H" Current CE "L" Current ICEH ICEL Soft Start Time tSS Latch Time tLAT Short Protection Threshold Voltage VSHORT CL Discharge Inductance Value Allowed Inductor Current RDCHG L IDC MIN. TYP. MAX. UNITS CIRCUIT <E-1> <E-2> <E-3> V 1.8 - 6.0 V 600 - - mA 1.00 1.40 1.78 V - 46 65 - 21 35 A - 0 1.0 A 2550 3000 3450 kHz <E-4> <E-5> <E-6> mA - 200 300 % 100 - - % - - 0 % - <E-7> - % 900 0.35 0.42 0.45 0.52 0.01 1050 0.55 0.67 0.66 0.77 1.0 1350 A mA - 100 - ppm/ 0.65 - 6.0 V VSS - 0.25 V - - VIN - 1.0 V VIN 0.25 - - V - 0.1 - 0.1 - 0.1 0.1 A A ms ms V H mA - 1.0 <E-8> 200 - <E-11> <E-12> - 20 <E-9> <E-10> 300 1.5 1000 450 - Test conditions: Unless otherwise stated, VIN=5.0V, VOUT (T) = Nominal Voltage NOTE: *1: Including hysteresis operating voltage range. *2: EFFI = { ( output voltagexoutput current ) / ( input voltagexinput current) }x100 *3: ON resistance ()= (VIN - Lx pin measurement voltage) / 100mA *4: Design value *5: When temperature is high, a current of approximately 10A (maximum) may leak. *6: The CE/MODE pin of the XCL207 series works also as an external switching pin of PWM control and PWM/PFM control. When the IC is in the operation, control is switched to the automatic PWM/PFM switching mode when the CE/MODE pin voltage is equal to or greater than VIN minus 0.3V, and to the PWM mode when the CE/MODE pin voltage is equal to or lower than VIN minus 1.0V and equal to or greater than VCEH. *7: Time until it short-circuits VOUT with GND via 1of resistor from an operational state and is set to Lx=0V from current limit pulse generating. *8: When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance. *9: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes. If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance. *10: Current limit denotes the level of detection at peak of coil current. *11: "H"=VIN~VIN-1.2V, "L"=+0.1V~-0.1V *12: IPFM and DTYLIMIT_PFM are defined only for the XCL206 and XCL207 series which have PFM control function. (Not for the XCL 205 series) *13: VPWMH and VPWML are defined only for the XCL207 series. (They are not used in the XCL205/and XCL206 series) *14: VIN is applied when VOUT (T) x 0.5V becomes more than VIN. 7/25 XCL205/XCL206/XCL207 Series ELECTRICAL CHARACTERISTICS (Continued) PFM Switching Current Output Voltage NOMINAL VOUT(V) OUTPUT NOMINAL OUTPUT IPFM(mA) <E-4> <E-5> <E-6> MIN TYP MAX <E-1> <E-2> <E-3> VOUT(T) MIN TYP MAX VOUT(T)1.2 190 260 350 1.00 0.980 1.000 1.020 1.2VVOUT(T)1.75 180 240 300 1.20 1.176 1.200 1.224 1.8VVOUT(T) 170 220 270 1.40 1.372 1.400 1.428 1.50 1.470 1.500 1.530 1.75 1.715 1.750 1.785 1.80 1.764 1.800 1.836 1.90 1.862 1.900 1.938 2.50 2.450 2.500 2.550 2.80 2.744 2.800 2.856 2.85 2.793 2.850 2.907 3.00 2.940 3.000 3.060 3.30 3.234 3.300 3.366 VOLTAGE VOLTAGE Short Protection Threshold Voltage Efficiency NOMINAL Efficiency(%) NOMINAL OUTPUT XCL205/206/207 OUTPUT VOLTAGE <E-7> VOLTAGE <E-8> <E-9> <E-10> <E-8> <E-9> <E-10> VOUT(T) 3.0MHz VOUT(T) MIN TYP MAX MIN TYP MAX 1.00 79 1.20 82 1.00 0.375 0.500 0.625 0.188 0.250 0.313 1.40 83 1.20 0.450 0.600 0.750 0.225 0.300 0.375 1.50 84 1.40 0.525 0.700 0.875 0.263 0.350 0.438 1.50 0.563 0.750 0.938 0.282 0.375 0.469 1.75 0.656 0.875 1.094 0.328 0.438 0.547 1.80 0.675 0.900 1.125 0.338 0.450 0.563 1.90 0.713 0.950 1.188 0.357 0.475 0.594 2.50 0.938 1.250 1.563 0.469 0.625 0.782 2.80 1.050 1.400 1.750 0.525 0.700 0.875 2.85 1.069 1.425 1.781 0.535 0.713 0.891 3.00 1.125 1.500 1.875 0.563 0.750 0.938 3.30 1.238 1.650 2.063 0.619 0.825 1.032 1.75 85 1.80 1.90 2.50 2.80 2.85 86 3.00 3.30 VSHORT(V) XCL205/206/207A,B,C Soft Start Time (XCL20xB, XCL20xG) NOMINAL OUTPUT tSS(ms) <E-11> <E-12> TYP MAX 0.8VVOUT(T)1.75 0.25 0.4 1.8VVOUT(T)4.0 0.32 0.5 VOLTAGE 8/25 XCL205/206/207G XCL205/XCL206/XCL207 Series TYPICAL APPLICATION CIRCUIT XCL205/XCL206/XCL207 Series L1 Lx V IN CIN Vss Vss CL V OUT CE/MODE L2 External Components CIN : 10V/4.7F (Ceramic) CL : 6.3V/10F (Ceramic) NOTE The Inductor can be used only for this DC/DC converter. Please do not use this inductor for the other reasons. Please use B, X5R, and X7R grades in temperature characteristics for CIN and CL capacitors. These grade ceramic capacitors minimize capacitance-loss as a function of voltage stress. 9/25 XCL205/XCL206/XCL207 Series OPERATIONAL DESCRIPTION The XCL205/XCL/206/XCL207 series consists of a reference voltage source, ramp wave circuit, error amplifier, PWM comparator, phase compensation circuit, output voltage adjustment resistors, P-channel MOSFET driver transistor, N-channel MOSFET switching transistor for the synchronous switch, current limiter circuit, UVLO circuit with control IC, and an inductor. (See the block diagram above.) Using the error amplifier, the voltage of the internal voltage reference source is compared with the feedback voltage from the VOUT pin through split resistors, R1 and R2. Phase compensation is performed on the resulting error amplifier output, to input a signal to the PWM comparator to determine the turn-on time during PWM operation. The PWM comparator compares, in terms of voltage level, the signal from the error amplifier with the ramp wave from the ramp wave circuit, and delivers the resulting output to the buffer driver circuit to cause the Lx pin to output a switching duty cycle. This process is continuously performed to ensure stable output voltage. The current feedback circuit monitors the P-channel MOS driver transistor current for each switching operation, and modulates the error amplifier output signal to provide multiple feedback signals. This enables a stable feedback loop even when a low ESR capacitor such as a ceramic capacitor is used ensuring stable output voltage. <Reference Voltage Source> The reference voltage source provides the reference voltage to ensure stable output voltage of the DC/DC converter. <Ramp Wave Circuit> The ramp wave circuit determines switching frequency. The frequency is fixed internally 3.0MHz. Clock pulses generated in this circuit are used to produce ramp waveforms needed for PWM operation, and to synchronize all the internal circuits. <Error Amplifier> The error amplifier is designed to monitor output voltage. The amplifier compares the reference voltage with the feedback voltage divided by the internal split resistors, R1 and R2. When a feed back voltage is lower than the reference voltage, the output voltage of the error amplifier is increased. The gain and frequency characteristics of the error amplifier output are fixed internally to deliver an optimized signal to the mixer. <Current Limit> The current limiter circuit of the XCL205/XCL206/XCL207 series monitors the current flowing through the P-channel MOS driver transistor connected to the Lx pin, and features a combination of the current limit mode and the operation suspension mode. When the driver current is greater than a specific level, the current limit function operates to turn off the pulses from the Lx pin at any given timing. When the driver transistor is turned off, the limiter circuit is then released from the current limit detection state. At the next pulse, the driver transistor is turned on. However, the transistor is immediately turned off in the case of an over current state. When the over current state is eliminated, the IC resumes its normal operation. The IC waits for the over current state to end by repeating the steps through . If an over current state continues for a few milliseconds and the above three steps are repeatedly performed, the IC performs the function of latching the OFF state of the driver transistor, and goes into operation suspension state. Once the IC is in suspension state, operations can be resumed by either turning the IC off via the CE/MODE pin, or by restoring power to the VIN pin. The suspension state does not mean a complete shutdown, but a state in which pulse output is suspended; therefore, the internal circuitry remains in operation. The current limit of the XCL205/XCL206/XCL207 series can be set at 1050mA at typical. Depending on the state of the PC Board, latch time may become longer and latch operation may not work. In order to avoid the effect of noise, an input capacitor is placed as close to the IC as possible. Limit < # ms Limit > # ms Current Limit LEVEL I Lx 0mA V OUT Vss Lx V CE V IN 10/25 Restart XCL205/XCL206/XCL207 Series OPERATIONAL DESCRIPTION (Continued) <Short-Circuit Protection> The short-circuit protection circuit monitors the internal R1 and R2 divider voltage from the VOUT pin (refer to FB point in the block diagram shown in the previous page). In case where output is accidentally shorted to the Ground and when the FB point voltage decreases less than half of the reference voltage (Vref) and a current more than the ILIM flows to the driver transistor, the short-circuit protection quickly operates to turn off and to latch the driver transistor. In the latch state, the operation can be resumed by either turning the IC off and on via the CE/MODE pin, or by restoring power supply to the VIN pin. When sharp load transient happens, a voltage drop at the VOUT is propagated to the FB point through CFB, as a result, short circuit protection may operate in the voltage higher than 1/2 VOUT voltage. <UVLO Circuit> When the VIN pin voltage becomes 1.4V or lower, the P-channel output driver transistor is forced OFF to prevent false pulse output caused by unstable operation of the internal circuitry. When the VIN pin voltage becomes 1.8V or higher, switching operation takes place. By releasing the UVLO function, the IC performs the soft start function to initiate output startup operation. The soft start function operates even when the VIN pin voltage falls momentarily below the UVLO operating voltage. The UVLO circuit does not cause a complete shutdown of the IC, but causes pulse output to be suspended; therefore, the internal circuitry remains in operation. <PFM Switch Current> In PFM control operation, until coil current reaches to a specified level (IPFM), the IC keeps the P-ch MOSFET on. In this case, on-time (tON) that the P-ch MOSFET is kept on can be given by the following formula. tON = LxIPFM / (VIN-VOUT) IPFM <PFM Duty Limit> In the PFM control operation, the PFM Duty Limit (DTYLIMIT_PFM) is set to 200% (TYP.). Therefore, under the condition that the duty increases (e.g. the condition that the step-down ratio is small), it's possible for P-ch MOSFET to be turned off even when coil IPFM current doesn't reach to IPFM. Maximum IPFM Limit tON Lx Lx fOSC IPFM ILx 0mA IPFM IPFM ILx 0mA IPFM 11/25 XCL205/XCL206/XCL207 Series OPERATIONAL DESCRIPTION (Continued) CL High Speed Discharge The XCL205B(C,G)/ XCL206B(C,G)/ XCL207B(C,G) series can quickly discharge the electric charge at the output capacitor (CL) when a low signal to the CE pin which enables a whole IC circuit put into OFF state, is inputted via the N-channel transistor located between the LX pin and the VSS pin. When the IC is disabled, electric charge at the output capacitor (CL) is quickly discharged so that it may avoid application malfunction. Discharge time of the output capacitor (CL) is set by the CL auto-discharge resistance (R) and the output capacitor (CL). By setting time constant of a CL auto-discharge resistance value [R] and an output capacitor value (CL) as (=C x R), discharge time of the output voltage after discharge via the N channel transistor is calculated by the following formula. V = VOUT(T) x e -t/ or t=ln (VOUT(T) / V) V : Output voltage after discharge VOUT(T) : Output voltage t: Discharge time, : C x R C= Capacitance of Output capacitor (CL) R= CL auto-discharge resistance Output Voltage Discharge Characteristics RDCHG=300(TYP.) Output Voltage (Relative Value) 100 = Setting Voltage Value 100 CL=10uF CL=20uF CL=50uF 80 60 40 20 0 0 20 40 60 Discharge Time (ms) 12/25 80 100 XCL205/XCL206/XCL207 Series OPERATIONAL DESCRIPTION (Continued) <CE/MODE Pin Function> The operation of the XCL205/XCL206/ XCL207 series will enter into the shut down mode when a low level signal is input to the CE/MODE pin. During the shutdown mode, the current consumption of the IC becomes 0A (TYP.), with a state of high impedance at the Lx pin and VOUT pin. The IC starts its operation by inputting a high level signal to the CE/MODE pin. The input to the CE/MODE pin is a CMOS input and the sink current is 0A (TYP.). XCL205/XCL206 series - Examples of how to use CE/MODE pin V IN V DD V IN V DD (A) SW_CE SW_CE R1 CE/MODE CE/MODE SELECTED STATUS ON Stand-by OFF Operation (B) SW_CE R2 SW_CE < IC inside > < IC inside > A SELECTED STATUS ON Operation OFF Stand-by B XCL207 series - Examples of how to use CE/MODE pin V IN V DD V IN V DD (A) SW_CE SW_PWM/PFM RM1 RM1 SW_CE CE/MODE RM2 CE/MODE SELECTED STATUS PWM/PFM ON RM2 SW_PWM/PFM SW_PWM/PFM * Automatic Switching Control SW_CE OFF ON PWM Control OFF OFF Stand-by < IC inside > < IC inside > (B) A B Intermediate voltage can be generated by RM1 and RM2. Please set the value of each R1, R2, RM1, RM2 from few hundreds k to few hundreds M. For switches, CPU open-drain I/O port and transistor can be used. SW_CE SW_PWM/PFM SELECTED STATUS ON * Stand-by OFF ON PWM Control OFF OFF PWM/PFM Automatic Switching Control 13/25 XCL205/XCL206/XCL207 Series OPERATIONAL DESCRIPTION (Continued) <Soft Start> The XCL205/XCL206/XCL207 series (A, C type) provide 0.9ms (TYP). The XCL205/XCL206/XCL207 series (B, G type) provide 0.32ms (TYP) however, when VOUT is less than 1.8V, provide 0.25ms (TYP.). Soft start time is defined as the time to reach 90% of the output nominal voltage when the CE pin is turned on. tSS VCEH 0V 90% of setting voltage VOUT 0V FUNCTION CHART CE/MODE VOLTAGE LEVEL H Level (*1) M Level (*2) L Level (*2) OPERATIONAL STATES XCL205 XCL206 XCL207 Synchronous Synchronous Synchronous PWM Fixed PWM/PFM PWM/PFM Control Automatic Switching Automatic Switching Stand-by Stand-by Note on CE/MODE pin voltage level range (*1) H level: 0.65V < H level < 6V (for XCL205/XCL206) H level: VIN - 0.25V < H level < VIN (for XCL207) (*2) M level: 0.65V < M level < VIN - 1.0V (for XCL207) (*3) L level: 0V < L level < 0.25V 14/25 Synchronous PWM Fixed Control Stand-by XCL205/XCL206/XCL207 Series NOTE ON USE 1. The XCL205/XCL206/XCL207 series is designed for use with ceramic output capacitors. If, however, the potential difference is too large between the input voltage and the output voltage, a ceramic capacitor may fail to absorb the resulting high switching energy and oscillation could occur on the output. If the input-output potential difference is large, connect an electrolytic capacitor in parallel to compensate for insufficient capacitance. 2. Spike noise and ripple voltage arise in a switching regulator as with a DC/DC converter. These are greatly influenced by external component selection, such as the coil inductance, capacitance values, and board layout of external components. Once the design has been completed, verification with actual components should be done. 3. Depending on the input-output voltage differential, or load current, some pulses may be skipped, and the ripple voltage may increase. 4. When the difference between VIN and VOUT is large in PWM control, very narrow pulses will be outputted, and there is the possibility that some cycles may be skipped completely. 5. When the difference between VIN and VOUT is small, and the load current is heavy, very wide pulses will be outputted and there is the possibility that some cycles may be skipped completely. 6. With the IC, the peak current of the coil is controlled by the current limit circuit. Since the peak current increases when dropout voltage or load current is high, current limit starts operation, and this can lead to instability. When peak current becomes high, please adjust the coil inductance value and fully check the circuit operation. In addition, please calculate the peak current according to the following formula: Ipk = (VIN - VOUT) x OnDuty / (2 x L x fOSC) + IOUT L: Coil Inductance Value fOSC: Oscillation Frequency 7. When the peak current which exceeds limit current flows within the specified time, the built-in P-ch driver transistor turns off. During the time until it detects limit current and before the built-in transistor can be turned off, the current for limit current flows; therefore, care must be taken when selecting the rating for the external components such as a coil. 8. When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance. 9. Depending on the state of the PC Board, latch time may become longer and latch operation may not work. In order to avoid the effect of noise, the board should be laid out so that input capacitors are placed as close to the IC as possible. 10. Use of the IC at voltages below the recommended voltage range may lead to instability. 11. This IC should be used within the stated absolute maximum ratings in order to prevent damage to the device. 12. When the IC is used in high temperature, output voltage may increase up to input voltage level at no load because of the leak current of the driver transistor. 13. The current limit is set to 1350mA (MAX.) at typical. However, the current of 1350mA or more may flow. In case that the current limit functions while the VOUT pin is shorted to the GND pin, when P-ch MOSFET is ON, the potential difference for input voltage will occur at both ends of a coil. For this, the time rate of coil current becomes large. By contrast, when N-ch MOSFET is ON, there is almost no potential difference at both ends of the coil since the VOUT pin is shorted to the GND pin. Consequently, the time rate of coil current becomes quite small. According to the repetition of this operation, and the delay time of the circuit, coil current will be converged on a certain current value, exceeding the amount of current, which is supposed to be limited originally. Even in this case, however, after the over current state continues for several ms, the circuit will be latched. A coil should be used within the stated absolute maximum rating in order to prevent damage to the device. Current flows into P-ch MOSFET to reach the current limit (ILIM). The current of ILIM or more flows since the delay time of the circuit occurs during from the detection of the current limit to OFF of P-ch MOSFET. Because of no potential difference at both ends of the coil, the time rate of coil current becomes quite small. Lx oscillates very narrow pulses by the current limit for several ms. The circuit is latched, stopping its operation. Limit > # ms Duty Lx ILIM ILx 15/25 XCL205/XCL206/XCL207 Series NOTE ON USE (Continued) 14. In order to stabilize VIN voltage level and oscillation frequency, we recommend that a by-pass capacitor (CIN) be connected as close as possible to the VIN & VSS pins. 15. High step-down ratio and very light load may lead an intermittent oscillation when PWM mode. 16. Please use within the power dissipation range below. Please also note that the power dissipation may changed by test conditions, the power dissipation figure shown is PCB mounted. Maximum Power Disspation Pd (W) 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0 25 50 75 100 Operating Temperature Ta () the power loss of micro DC/DC according to the following formula: power loss = VOUTxIOUTx((100/EFFI) - 1) (W) VOUTOutput Voltage (V) IOUT Output Current (A) EFFIConversion Efficiency (%) 40.0 Measurement Condition (Reference data) Condition: Mount on a board Ambient: Natural convection Material: Thickness: Through-hole: 40.0 Lead (Pb) free 2 Dimensions 40 x 40 mm (1600 mm in one side) Copper (Cu) traces occupy 50% of the board area In top and back faces Package heat-sink is tied to the copper traces Glass Epoxy (FR-4) 1.6mm 4 x 0.8 Diameter 28.9 Soldering: Board: 28.9 2.5 . 2.54 . 1.4 Evaluation Board (Unit: mm) 16/25 XCL205/XCL206/XCL207 Series NOTE ON USE (Continued) Instructions of pattern layouts 1. In order to stabilize VIN voltage level, we recommend that a by-pass capacitor (CIN) be connected as close as possible to the VIN (No.6) & VSS (No.5) pins. 2. Please mount each external component as close to the IC as possible. 3. Wire external components as close to the IC as possible and use thick, short connecting traces to reduce the circuit impedance. 4. Make sure that the PCB GND traces are as thick as possible, as variations in ground potential caused by high ground currents at the time of switching may result in instability of the IC. 5. This series' internal driver transistors bring on heat because of the output current and ON resistance of driver transistors. 6. Please connect Lx (No.1) pin and L1 (No.7) pin by wiring on the PCB. 7. Please connect VOUT (No.3) pin and L2 (No.8) pin by wiring on the PCB. VOUT GND VOUT GND CE LX GND VIN CL LX CE IC CIN GND VIN FRONT VOUT BACK (Flip Horizontal) GND CL LX CE IC CIN GND VIN FRONT (PCB mounted) 17/25 XCL205/XCL206/XCL207 Series TEST CIRCUITS Wave Form Measure Point < Circuit No.1 > L1 A VIN A Lx CE/ MODE CIN V VOUT VSS < Circuit No.2 > CL L2 L1 Lx VIN 1F CE/ MODE VOUT VSS L2 External Components CIN : 4.7F(ceramic) CL : 10F(ceramic) < Circuit No.3 > < Circuit No.4 > Wave Form Measure Point L1 VIN Lx CE/ MODE 1F Rpulldown 200 VOUT VSS L1 Lx VIN 1F CE/ MODE L2 V VOUT VSS 100mA L2 ON resistance = (VIN-VLx)/100mA < Circuit No.5 > < Circuit No.6 > ILeakH L1 VIN Wave Form Measure Point L1 Lx A VIN Lx 1F ICEH A ILeakL CE/ MODE 1F VOUT VSS CE/ MODE L2 VSS V VOUT L2 ILIM ICEL < Circuit No.8 > < Circuit No.7 > VIN 1F L1 Lx VIN Ilat CE/ MODE VOUT VSS ILx Wave Form Measure Point L1 L2 CE/ MODE 1uF Wave Form Measure Point L1 A CIN Lx CE/ MODE VOUT VSS A CIN L L1 VIN Lx CE/ MODE L2 VOUT VSS *External Components External Components : 1.5uH() L L: 1.5H : 4.7F(ceramic) CINCIN: 4.7F(ceramic) : 10F(ceramic) CL CL: 10F(ceramic) 18/25 L2 < Circuit No.10 > VIN A VOUT VSS Rpulldown 1 < Circuit No.9 > Lx L2 CL V XCL205/XCL206/XCL207 Series TYPICAL PERFORMANCE CHARACTERISTICS (1) Efficiency vs. Output Current (2) Output Voltage vs. Output Current XCL205A183AR/XCL206A183AR/XCL207A183AR 100 XCL206/XCL207(PWM/PFM) 2.0 Output Voltage:V OUT(V) 80 Efficency:EFFI(%) XCL205A183AR/XCL206A183AR/XCL207A183AR 2.1 60 2.4V 3.6V VIN= 4.2V 40 XCL205/XCL207 (PWM) 20 XCL/206/XCL207 (PWM/PFM) VIN4.2V,3.6V,2.4V 1.9 1.8 1.7 XCL205/XCL207 (PWM) 1.6 1.5 0 0.1 1 10 100 0.1 1000 1 (3) Ripple Voltage vs. Output Current 1000 (4) Oscillation Frequency vs. Ambient Temperature XCL205A183AR/XCL206A183AR/XCL207A183AR XCL205A183AR/XCL206A183AR/XCL207A183AR 100 3.5 Oscillation Frequency : fosc(MHz) Ripple Voltage:Vr(mV) 100 Output Current:IOUT (mA) Output Current:IOUT (mA) 80 60 XCL206/XCL207 (PWM/PFM) VIN4.2V 3.6V 2.4V XCL205/XCL207 (PWM) VIN4.2V,3.6V,2.4V 40 20 0 0.1 1 10 100 3.4 3.3 3.2 3.1 VIN=3.6V 3.0 2.9 2.8 2.7 2.6 2.5 -50 1000 -25 Output Current:IOUT (mA) 25 50 75 100 (6) Output Voltage vs. Ambient Temperature XCL205A183AR/XCL206A183AR/XCL207A183AR XCL206A183AR/XCL207A183AR 2.1 40 VIN=6.0V 35 2.0 Output Voltage : V OUT (V) 4.0V 30 25 20 15 2.0V 10 5 0 -50 0 Ambient Temperature: Ta () (5) Supply Current vs. Ambient Temperature Supply Current : IDD (A) 10 1.9 VIN=3.6V 1.8 1.7 1.6 1.5 -25 0 25 50 Ambient Temperature: Ta () 75 100 -50 -25 0 25 50 75 100 Ambient Temperature: Ta () 19/25 XCL205/XCL206/XCL207 Series TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (7) UVLO Voltage vs. Ambient Temperature (8) CE "H" Voltage vs. Ambient Temperature XCL205A183AR/XCL206A183AR/XCL207A183AR XCL205A183AR/XCL206A183AR/XCL207A183AR 1.0 1.8 0.9 CE "H" Voltage : VCEH (V) UVLO Voltage : UVLO (V) CE=VIN 1.5 1.2 0.9 0.6 0.3 0.8 VIN=5.0V 0.7 3.6V 0.6 0.5 0.4 0.3 2.4V 0.2 0.1 0.0 0.0 -50 -25 0 25 50 75 -50 100 -25 Ambient Temperature: Ta ( ) 0 25 50 75 100 Ambient Temperature: Ta () (9) CE "L" Voltage vs. Ambient Temperature (10) Soft Start Time vs. Ambient Temperature XCL205A183AR/XCL206A183AR/XCL207A183AR XCL205A183AR/XCL206A183AR/XCL207A183AR 1.0 5.0 0.8 Soft Start Time : tss (ms) CE "L" Voltage : VCEL (V) 0.9 VIN=5.0V 0.7 3.6V 0.6 0.5 0.4 0.3 2.4V 0.2 4.0 3.0 2.0 VIN=3.6V 1.0 0.1 0.0 0.0 -50 -25 0 25 50 75 -50 100 -25 Ambient Temperature: Ta ( ) 25 XCL205B333AR/XCL206B333AR/XCL207B333AR XCL205A183AR/XCL206A183AR/XCL207A183AR 0.9 XCL206B333 VIN=5.0V IOUT=1.0mA 0.8 Nch on Resistance 0.6 0.5 2ch 0.4 VOUT 0.3 Pch on Resistance 0.2 0.1 1ch CE:0.0V1.0V 0.0 0 1 2 3 4 Input Voltage : VIN (V) 20/25 75 (12) Rise Wave Form 1.0 0.7 50 Ambient Temperature: Ta () (11) "Pch / Nch" Driver on Resistance vs. Input Voltage Lx SW ON Resistance:RLxH,RLxL () 0 5 6 1ch:1V/div 2ch:1V/div Time: 100s /div Time:100s/div 100 XCL205/XCL206/XCL207 Series TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (14) CL Discharge Resistance vs. Ambient Temperature (13) Soft-Start Time vs. Ambient Temperature XCL205B333AR/XCL206B333AR/XCL207B333AR XCL205B333AR/XCL206B333AR/XCL207B333AR 600 400 CL Discharge Resistance: () Soft Start Time : tss (s) 500 VIN=5.0V IOUT=1.0mA 300 200 100 0 -50 -25 0 25 50 75 100 XCL207B333 500 400 2.0V VIN=6.0V 300 200 100 -50 4.0V -25 0 25 50 75 100 Ambient Temperature: Ta ( ) Ambient Temperature: Ta () (15) Load Transient Response MODEPWM/PFM Automatic Switching Control XCL206A183AR/XCL207A183AR XCL206A183AR/XCL207A183AR VIN=3.6V,VOUT=1.8V VIN=3.6V,VOUT=1.8V IOUT=1mA 300mA IOUT=1mA 100mA 1ch 1ch VOUT VOUT 2ch 2ch 1ch:100mA/div 2ch:50mV/div 1ch:100mA/div 2ch:50mV/div Time:100s/div Time: 100s /div Time:100s/div Time: 100s /div XCL206A183AR/XCL207A183AR XCL206A183AR/XCL207A183AR VIN=3.6V,VOUT=1.8V VIN=3.6V,VOUT=1.8V IOUT=300mA 1mA IOUT=100mA 1mA 1ch 1ch 2ch 2ch VOUT VOUT 1ch:100mA/div 2ch:50mV/div 1ch:100mA/div 2ch:50mV/div Time:100s/div Time: 100s /div Time:100s/div Time: 100s /div 21/25 XCL205/XCL206/XCL207 Series TYPICAL PERFORMANCE CHARACTERISTICS (Continued) (15) Load Transient Response (Continued) MODEPWM Control XCL205A183AR/XCL207A183AR XCL205A183AR/XCL207A183AR VIN=3.6V,VOUT=1.8V VIN=3.6V,VOUT=1.8V IOUT=1mA 100mA IOUT=1mA 300mA 1ch 1ch 2ch 2ch 1ch:100mA/div 2ch:50mV/div 1ch:100mA/div 2ch:50mV/div Time:100s/div Time: 100s /div Time:100s/div Time: 100s /div XCL205A183AR/XCL207A183AR XCL205A183AR/XCL207A183AR VIN=3.6V,VOUT=1.8V VIN=3.6V,VOUT=1.8V 1ch IOUT=300mA 1mA IOUT=100mA 1mA 1ch 2ch 2ch 1ch:100mA/div 2ch:50mV/div Time:100s/div Time: 100s /div 22/25 1ch:100mA/div 2ch:50mV/div Time:100s/div Time: 100s /div XCL205/XCL206/XCL207 Series PACKAGING INFORMATION CL-2025 (unit: mm) External Lead Reference Pattern Layout (unit:mm) Reference Metal Mask Design (unit:mm) 23/25 XCL205/XCL206/XCL207 Series MARKING RULE CL-2025 represents products series MARK PRODUCT SERIES 4 1 3 2 6 XCL205A*****-G XCL205B*****-G XCL205G*****-G XCL205C*****-G XCL206A*****-G XCL206B*****-G XCL206G*****-G XCL206C*****-G XCL207A*****-G XCL207B*****-G XCL207G*****-G XCL207C*****-G C 5 K 5 4 D L 6 E M represents type of DC/DC converters OUTPUT VOLTAGE (V) XCL20*A/B/C***** MARK XCL20*G***** 0.x 1.x 2.x 3.x 4.x F H K L M U V X Y Z represents the decimal part of output voltage OUTPUT VOLTAGE (V) MARK PRODUCT SERIES X.0 X.05 X.1 X.15 X.2 X.25 X.3 X.35 X.4 X.45 X.5 X.55 X.6 X.65 X.7 X.75 X.8 X.85 X.9 X.95 0 A 1 B 2 C 3 D 4 E 5 F 6 H 7 K 8 L 9 M XCL20***0***-G XCL20***A***-G XCL20***1***-G XCL20***B***-G XCL20***2***-G XCL20***C***-G XCL20***3***-G XCL20***D***-G XCL20***4***-G XCL20***E***-G XCL20***5***-G XCL20***F***-G XCL20***6***-G XCL20***H***-G XCL20***7***-G XCL20***K***-G XCL20***8***-G XCL20***L***-G XCL20***9***-G XCL20***M***-G , represents production lot number 01090A0Z119ZA1A9AAZ9ZAZZ in order. (G, I, J, O, Q, W excluded) Note: No character inversion used. 24/25 XCL205/XCL206/XCL207 Series 1. The products and product specifications contained herein are subject to change without notice to improve performance characteristics. Consult us, or our representatives before use, to confirm that the information in this datasheet is up to date. 2. We assume no responsibility for any infringement of patents, patent rights, or other rights arising from the use of any information and circuitry in this datasheet. 3. Please ensure suitable shipping controls (including fail-safe designs and aging protection) are in force for equipment employing products listed in this datasheet. 4. The products in this datasheet are not developed, designed, or approved for use with such equipment whose failure of malfunction can be reasonably expected to directly endanger the life of, or cause significant injury to, the user. (e.g. Atomic energy; aerospace; transport; combustion and associated safety equipment thereof.) 5. Please use the products listed in this datasheet within the specified ranges. Should you wish to use the products under conditions exceeding the specifications, please consult us or our representatives. 6. We assume no responsibility for damage or loss due to abnormal use. 7. All rights reserved. No part of this datasheet may be copied or reproduced without the prior permission of TOREX SEMICONDUCTOR LTD. 25/25