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ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. FAN48610 2.5 MHz, Fixed-Output Synchronous TinyBoost(R) Regulator Features Description The FAN48610 is a low-power boost regulator designed to provide a minimum voltage-regulated rail from a standard single-cell Li-Ion battery and advanced battery chemistries. Even below the minimum system battery voltage, the device maintains the output voltage regulation for a minimum output load current of 1.0 A. The combination of built-in power transistors, synchronous rectification, and low supply current suit the FAN48610 for battery-powered applications. Output Voltages Range: 3.0 V to 5.0 V IOUT 1 A at VOUT = 5.0 V, VIN 2.5 V IOUT 1.5 A at VOUT = 5.0 V, VIN 3.0 V Up to 94% Efficient Internal Synchronous Rectification The FAN48610 is available in a 9-bump, 0.4 mm pitch, Wafer-Level Chip-Scale Package (WLCSP). Soft-Start with True Load Disconnect Short-Circuit Protection 9-Bump, 1.215 mm x 1.215 mm, 0.4 mm Pitch WLCSP Three External Components: 2016 0.47 H Inductor, 0603 Case Size Input / Output Capacitors Total Application Board Solution Size: < 11 mm 2 Battery + VOUT CIN COUT SW 0.47H Applications VIN 10F L1 Input Voltage Range: 2.5 V to 4.50 V Class-D Audio Amplifier and USB OTG Supply SYSTEM LOAD 22F FAN48610 EN PGND AGND Boost for Low-Voltage Li-Ion Batteries Smart Phones, Tablets, Portable Devices, Wearables Figure 1. Typical Application Ordering Information Part Number VOUT FAN48610UC50X (2) FAN48610BUC50X 4.5 V (2) 3.3 V FAN48610BUC33X Package Packing (1) 5.0 V (2) FAN48610BUC45X Operating Temperature Device Marking KF -40C to 85C WLCSP, 0.4 mm Pitch Tape and Reel KA KN Notes: 1. Tape and reel specifications are available on www.fairchildsemi.com. 2. Includes backside lamination. (c) 2013 Fairchild Semiconductor Corporation FAN48610 * Rev. 1.5 www.fairchildsemi.com FAN48610 -- 2.5 MHz, Fixed-Output Synchronous TinyBoost(R) Regulator August 2015 SW Q2A L1 Q2B VOUT VIN Q1 Q2 COUT CIN Synchronous Rectifier Control PGND EN Modulator Logic & Control AGND Figure 2. IC Block Diagram Table 1. Recommended Components Component Description Vendor Parameter Typ. Unit 0.47 H 0.47 H, 30%, 2016 Toko: DFE201612C DFR201612C Cyntec: PIFE20161B L L1 DCR (Series R) 40 m CIN 10 F, 10%, 6.3 V, X5R, 0603 Murata: GRM188R60J106K TDK: C1608X5R0J106K C 10 F COUT 22 F, 20%, 6.3 V, X5R, 0603 TDK: C1608X5R0J226M C 22 F Pin Configuration VOUT A1 A2 SW B1 A3 A3 A2 A1 B3 B2 B1 C3 C2 C1 EN B2 PGND C1 VIN C2 B3 AGND C3 Figure 3. Top View Figure 4. Bottom View Pin Definitions Pin # Name Description A1, A2 VOUT A3 VIN Input Voltage. Connect to Li-Ion battery input power source and the bias supply for the gate drivers. B1, B2 SW Switching Node. Connect to inductor. B3 EN Enable. When this pin is HIGH, the circuit is enabled. C1, C2 PGND Power Ground. This is the power return for the IC. COUT capacitor should be returned with the shortest path possible to these pins. C3 AGND Analog Ground. This is the signal ground reference for the IC. All voltage levels are measured with respect to this pin - connect to PGND at a single point. Output Voltage. This pin is the output voltage terminal; connect directly to COUT. (c) 2013 Fairchild Semiconductor Corporation FAN48610 * Rev. 1.5 www.fairchildsemi.com 2 FAN48610 -- 2.5 MHz, Fixed-Output Synchronous TinyBoost(R) Regulator Block Diagrams Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol VIN VOUT Parameter Voltage on VIN Pin Min. Max. Unit -0.3 6.0 V 6.0 V Voltage on VOUT Pin SW SW Node VCC Voltage on Other Pins ESD Electrostatic Discharge Protection Level DC -0.3 6.0 Transient: 10 ns, 3 MHz -1.0 8.0 -0.3 6.0 Human Body Model per JESD22-A114 2 Charged Device Model per JESD22-C101 1 (3) V V kV TJ Junction Temperature -40 +150 C TSTG Storage Temperature -65 +150 C +260 C TL Lead Soldering Temperature, 10 Seconds Note: 3. Lesser of 6.0 V or VIN + 0.3 V. Recommended Operating Conditions The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to absolute maximum ratings. Symbol Parameter VIN Supply Voltage IOUT Maximum Output Current Min. Max. 2.5 4.5 1000 Unit V mA TA Ambient Temperature -40 +85 C TJ Junction Temperature -40 +125 C Thermal Properties Junction-to-ambient thermal resistance is a function of application and board layout. This data is measured with four-layer 2s2p boards with vias in accordance to JEDEC standard JESD51. Special attention must be paid not to exceed junction temperature, TJ(max), at a given ambient temperature, TA. Symbol JA Parameter Junction-to-Ambient Thermal Resistance (c) 2013 Fairchild Semiconductor Corporation FAN48610 * Rev. 1.5 Typical Unit 50 C/W www.fairchildsemi.com 3 FAN48610 -- 2.5 MHz, Fixed-Output Synchronous TinyBoost(R) Regulator Absolute Maximum Ratings Recommended operating conditions, unless otherwise noted, circuit per Figure 1, VOUT= 3.0 V to 5.0 V, VIN = 2.5 V to 4.5 V, TA = -40C to 85C. Typical values are given VIN = 3.6 V and TA = 25C. Symbol Parameter Conditions Min. Typ. Max. VIN=3.6 V, IOUT=0, EN= VIN 85 125 Shutdown: EN=0, VIN=3.6 V 3 10 2.2 2.3 Unit Power Supply IQ VIN Quiescent Current VUVLO Under-Voltage Lockout VIN Rising VUVLO_HYS Under-Voltage Lockout Hysteresis 150 A V mV Inputs VIH Enable HIGH Voltage VIL Enable LOW Voltage IPD Current Sink Pull-Down EN Pin, Logic HIGH Low-State Active Pull-Down EN Pin, Logic LOW RLOW 1.05 V 0.4 V 400 k 4 % 1 A 3.5 A 5 % 3.0 MHz 100 200 300 nA Outputs VREG Output Voltage Accuracy DC Referred to VOUT, 2.5 V VIN VOUT -150 mV (4) ILK_OUT VIN -to-VOUT Leakage Current VOUT=0, EN=0, VIN=4.2 V ILK VOUT-to-VIN Reverse Leakage Current VOUT=5.0 V, EN=0, VIN=2.5 V VTRSP Output Voltage Accuracy Transient (5) -2 Referred to VOUT, 50-500 mA Load Step -5 VIN=3.6 V, VOUT=5.0 V, Load=1000 mA 2.0 Timing fSW tSS tRST Switching Frequency Soft-Start EN HIGH to Regulation (5) 50 Load, VOUT = 5.0 V (5) FAULT Restart Timer 2.5 600 s 20 ms Power Stage RDS(ON)N N-Channel Boost Switch RDS(ON) VIN=3.6 V, VOUT=5.0 V 80 130 m RDS(ON)P P-Channel Sync. Rectifier RDS(ON) VIN=3.6 V, VOUT=5.0 V 65 115 m Boost Valley Current Limit VOUT=5.0 V 3.0 A IV_LIM IV_LIM_SS Boost Soft-Start Valley Current Limit VMIN_1.0A Minimum VIN for 1000 mA Load (5) VMIN_1.5A Minimum VIN for 1500 mA Load (5) VIN 3 F. 5. Guaranteed by design and characterization; not tested in production. (c) 2013 Fairchild Semiconductor Corporation FAN48610 * Rev. 1.5 www.fairchildsemi.com 4 FAN48610 -- 2.5 MHz, Fixed-Output Synchronous TinyBoost(R) Regulator Electrical Characteristics 96% 96% 92% 92% Efficiency Efficiency Unless otherwise specified; VIN = 3.6 V, VOUT = 5.0 V, TA = 25C, and circuit and components according to Figure 1. 88% 84% 88% 84% 2.6 VIN 80% - 40C 80% 3.0 VIN +25C 3.6 VIN 4.2 VIN +85C 76% 76% 1 10 100 1000 1 10 Load Current (mA) 100 1000 Load Current (mA) Figure 5. Efficiency vs. Load Current and Input Voltage Figure 6. Efficiency vs. Load Current and Temperature 98% 96% 94% Efficiency Efficiency 92% 88% 90% 86% 84% -40C 82% 2.5 VIN +25C 2.7 VIN +85C 3.0 VIN 78% 80% 10 100 10 1000 100 1000 Load Current (mA) Load Current (mA) Figure 7. Efficiency vs. Load Current and Input Voltage, VOUT=3.3V Figure 8. Efficiency vs. Load Current and Temperature, VIN=3.0V, VOUT=3.3V 2 3 Output Regulation (%) Output Regulation (%) 2 1 0 2.6 VIN 1 0 -1 - 40C 3.0 VIN -1 +25C 3.6 VIN +85C 4.2 VIN -2 -2 0 250 500 750 0 1000 500 750 1000 Load Current (mA) Load Current (mA) Figure 10. Output Regulation vs. Load Current and Temperature (Normalized to 3.6 VIN, 500 mA Load, TA=25C) Figure 9. Output Regulation vs. Load Current and Input Voltage (Normalized to 3.6 VIN, 500 mA Load) (c) 2013 Fairchild Semiconductor Corporation FAN48610 * Rev. 1.5 250 www.fairchildsemi.com 5 FAN48610 -- 2.5 MHz, Fixed-Output Synchronous TinyBoost(R) Regulator Typical Characteristics 120 60 100 50 Output Ripple (mVpp) Input Current (A) Unless otherwise specified; VIN = 3.6 V, VOUT = 5.0 V, TA = 25C, and circuit and components according to Figure 1. 80 60 40 - 40C Auto 20 40 30 20 2.6 VIN 3.0 VIN 10 3.6 VIN +25C Auto 4.2 VIN +85C Auto 0 0 2.0 2.5 3.0 3.5 4.0 0 4.5 250 500 750 1000 Load Current (mA) Input Voltage (V) Figure 11. Quiescent Current vs. Input Voltage, Temperature Figure 12. Output Ripple vs. Load Current and Input Voltage 3,000 Switching Frequency (KHz) 2,500 2,000 1,500 1,000 2.6 VIN 3.0 VIN 500 3.6 VIN 4.2 VIN 0 0 250 500 750 1000 Load Current (mA) Figure 13. Frequency vs. Load Current and Input Voltage Figure 14. Startup, 50 Figure 15. Overload Protection (c) 2013 Fairchild Semiconductor Corporation FAN48610 * Rev. 1.5 Figure 16. Load Transient, 100-500 mA, 100 ns Edge www.fairchildsemi.com 6 FAN48610 -- 2.5 MHz, Fixed-Output Synchronous TinyBoost(R) Regulator Typical Characteristics Unless otherwise specified; VIN = 3.6 V, VOUT = 5.0 V, TA = 25C, and circuit and components according to Figure 1. Figure 17. Load Transient, 500-1000 mA, 100 ns Edge Figure 18. Simultaneous Line / Load Transient, 3.3-3.9 VIN, 10 s Edge, 500-1000 mA Load, 100 ns Edge Maximum Output Current (A) 2.60 2.20 1.80 1.40 1.00 +25C +85C 0.60 2.5 3.0 3.5 4.0 4.5 Input Voltage (V) Figure 19. Line Transient, 3.3-3.9 VIN, 10 s Edge, 500 mA Load (c) 2013 Fairchild Semiconductor Corporation FAN48610 * Rev. 1.5 Figure 20. Typical Maximum Output Current vs. Input Voltage www.fairchildsemi.com 7 FAN48610 -- 2.5 MHz, Fixed-Output Synchronous TinyBoost(R) Regulator Typical Characteristics FAN48610 is a synchronous boost regulator, typically operating at 2.5 MHz in Continuous Conduction Mode (CCM), which occurs at moderate to heavy load current and low VIN voltages. The regulator's Pass-Through Mode automatically activates when VIN is above the boost regulator's set point. Table 2. If VOUT reaches VIN-300 mV during LIN1 Mode, the SS Mode is initiated. Otherwise, LIN1 times out after 512 s and LIN2 Mode is entered. In LIN2 Mode, the current source is incremented to 1.6 A. If VOUT fails to reach VIN-300 mV after 1024 s, a fault condition is declared and the device waits 20 ms to attempt an automatic restart. Operating Modes Mode Description Invoked When: LIN Linear Startup VIN > VOUT SS Boost Soft-Start VIN < VOUT < VOUT(TARGET) BST Boost Operating Mode VOUT= VOUT(TARGET) PT Pass-Through Mode VIN > VOUT(TARGET) Soft-Start (SS) Mode Upon the successful completion of LIN Mode (VOUT>VIN300 mV), the regulator begins switching with boost pulses current limited to 50% of nominal level. During SS Mode, if VOUT fails to reach regulation during the SS ramp sequence for more than 64 s, a fault is declared. If large COUT is used, the reference is automatically stepped slower to avoid excessive input current draw. Boost Mode Regulation Boost (BST) Mode The FAN48610 uses a current-mode modulator to achieve excellent transient response and smooth transitions between CCM and DCM operation. During CCM operation, the device maintains a switching frequency of about 2.5 MHz. In lightload operation (DCM), frequency is naturally reduced to maintain high efficiency. This is a normal operating mode of the regulator. Pass-Through (PT) Mode In normal operation, the device automatically transitions from Boost Mode to Pass-Through Mode if VIN goes above the target VOUT. In Pass-Through Mode, the device fully enhances Q2 to provide a very low impedance path from VIN to VOUT. Entry to the Pass-Through Mode is triggered by condition where VIN > VOUT and no switching has occurred during the past 5 s. To soften the entry into Pass-Through Mode, Q2 is driven as a linear current source for the first 5 s. Pass-Through Mode exit is triggered when VOUT reaches the target VOUT voltage. During Automatic PassThrough Mode, the device is short-circuit protected by a voltage comparator tracking the voltage drop from V IN to VOUT; if the drop exceeds 300 mV, a fault is declared. Shutdown and Startup When EN is LOW, all bias circuits are off and the regulator is in Shutdown Mode. During shutdown, current flow is prevented from VIN to VOUT, as well as reverse flow from VOUT to VIN. It is recommended to keep load current draw below 500 mA until the devices successfully executes startup. The following table describes the startup sequence. Table 3. Boost Startup Sequence Start Mode Entry Exit LIN1 VIN > VUVLO, EN=1 VOUT > VIN300 mV SS TIMEOUT LIN2 VOUT > VIN300 mV SS LIN2 SS LIN1 Exit LIN1 or LIN2 Exit End Timeout Mode (s) TIMEOUT FAULT VOUT=VOUT(TARGET) BST OVERLOAD TIMEOUT FAULT Fault State The regulator enters Fault State under any of the following conditions: 512 1024 64 VOUT fails to achieve the voltage required to advance from LIN Mode to SS Mode. VOUT fails to achieve the voltage required to advance from SS Mode to BST Mode. Boost current limit triggers for 2 ms during BST Mode. VIN - VOUT > 300 mV; this fault can occur only after successful completion of the soft-start sequence. VIN < VUVLO. Once a fault is triggered, the regulator stops switching and presents a high-impedance path between VIN and VOUT. After waiting 20 ms, an automatic restart is attempted. LIN Mode When EN is HIGH and VIN > VUVLO, the regulator first attempts to bring VOUT within 300 mV of VIN by using the internal fixed-current source from VIN (Q2). The current is limited to the LIN1 set point. (c) 2013 Fairchild Semiconductor Corporation FAN48610 * Rev. 1.5 Over-Temperature The regulator shuts down if the die temperature exceeds 150C. Restart occurs when the IC has cooled by approximately 20C. www.fairchildsemi.com 8 FAN48610 -- 2.5 MHz, Fixed-Output Synchronous TinyBoost(R) Regulator Circuit Description Output Capacitance (COUT) Output Voltage Ripple (6) The effective capacitance (CEFF ) of small, high-value ceramic capacitors decreases as their bias voltage increases, as illustrated in the graph below: Output voltage ripple is inversely proportional to C OUT. During tON, when the boost switch is on, all load current is supplied by COUT. 25 VRIPPLE ( P P ) tON 20 ILOAD COUT EQ. 1 Capacitance (F) and 15 V tON t SW D t SW 1 IN V OUT therefore: 10 V VRIPPLE ( P P ) tSW 1 IN V OUT 5 0 0 1 2 3 4 5 EQ. 2 ILOAD COUT EQ. 3 6 t SW DC Bias Voltage (V) Figure 21. CEFF for 22 F, 0603, X5R, 6.3 V-Rated Capacitor (TDK C1608X5R0J226M) 1 EQ. 4 fSW FAN48610 is guaranteed for stable operation with the minimum value of CEFF (CEFF(MIN)) outlined in Table 4. The maximum VRIPPLE occurs when VIN is minimum and ILOAD is maximum. For better ripple performance, more output capacitance can be added. Table 4. Layout Recommendations Minimum CEFF Required for Stability Operating Conditions VOUT (V) VIN (V) ILOAD (mA) 5.0 2.5 to 4.5 0 to 1000 CEFF(MIN) (F) The layout recommendations below highlight various topcopper pours by using different colors. 3.0 To minimize spikes at VOUT, COUT must be placed as close as possible to PGND and VOUT, as shown below. Note: 6. CEFF varies by manufacturer, capacitor material, and case size. For thermal reasons, it is suggested to maximize the pour area for all planes other than SW. Especially the ground pour should be set to fill all available PCB surface area and tied to internal layers with a cluster of thermal vias. Inductor Selection Recommended nominal inductance value is 0.47 H. The FAN48610 employs valley-current limiting, so peak inductor current can reach 3.8 A for a short duration during overload conditions. Saturation effects cause the inductor current ripple to become higher under high loading, as only the valley of the inductor current ripple is controlled. Startup Input current limiting is in effect during soft-start, which limits the current available to charge COUT and any additional capacitance on the VOUT line. If the output fails to achieve regulation within the limits described in the Soft-Start section above, a fault occurs, causing the circuit to shut down. It waits about 20 ms before attempting a restart. If the total combined output capacitance is very high, the circuit may not start on the first attempt, but eventually achieves regulation if no load is present. If a high current load and high capacitance are both present during soft-start, the circuit may fail to achieve regulation and continually attempt soft-start, only to have the output capacitance discharged by the load when in Fault State. Figure 22. Layout Recommendation Product-Specific Dimensions (This table pertains to the package information on the following page.) D E X Y 1.215 0.030 mm 1.215 0.030 mm 0.2075 mm 0.2075 mm (c) 2013 Fairchild Semiconductor Corporation FAN48610 * Rev. 1.5 www.fairchildsemi.com 9 FAN48610 -- 2.5 MHz, Fixed-Output Synchronous TinyBoost(R) Regulator Application Information 0.03 C E 2X E A B 0.40 A1 BALL A1 INDEX AREA Cu Pad (Bottom) 0.40 D 0.03 C Solder Mask 2X RECOMMENDED LAND PATTERN (NSMD PAD TYPE) TOP VIEW 0.06 C 0.05 C C SEATING PLANE D 0.005 0.40 9X C B 0.40 A 1 2 3 BOTTOM VIEW SIDE VIEWS NOTES A. NO JEDEC REGISTRATION APPLIES. B. DIMENSIONS ARE IN MILLIMETERS. C A B C. DIMENSIONS AND TOLERANCE PER ASME Y14.5M, 2009. D. DATUM C IS DEFINED BY THE SPHERICAL CROWNS OF THE BALLS. E. FOR DIMENSIONS D,E,X, AND Y SEE PRODUCT DATASHEET. F. DRAWING FILNAME: MKT-UC009Ak rev3 E ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor's product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. "Typical" parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. 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