DESCRIPTION The LM340 series of 3-terminal regulators is available with several fixed output voltages making them useful in a wide range of applications. One of these is local on card regulation, eliminating the distridution problems associated with single point regu- lation. The voltages available allow these regulators to be used in logic systems, instrumentation, HiFi, and other solid state electronic equipment. Although designed primarily as fixed voltage regulators these devices can be used with external compo- nents to obtain adjustable voltages. EQUIVALENT SCHEMATIC FEATURES Output current in excess of 1A e Internal thermal overload protection No external components required Output transistor safe area protection Internal short circuit current limit Available in plastic TO-220 and metal TO-3 packages 1 INPUT Qi v3. ats R10 1k R15 2k 3 aig | 3 R16 > 23 2 pom) OUTPUT > 2 R17 < m<s ay oe 30k > aw at > RS R2 a7 1.9k 17k 2 o1 ak 4 20pF a2 = -4-Kow R3 26 | Qa an a 2.4k + as s Q3 as < AS > ak - > > Ra $ RS RB gg ; 1.2k D> 12.1k 1% 9 GND | 3 NOTE All resistor values are in ohms. = LM340-DA,U PIN CONFIGURATION O U PACKAGE (TO-220) (Top View) OUTPUT (2) COMMON (3) INPUT (1) ORDER INFORMATION OUTPUT ORDER VOLTAGE PART NO. 5V LM340-SU 6V LM340-6U 8V L.M340-8U 12vV LM340-12U 15V LM340-15U 18V LM340-18U 24Vv LM340-24U DA PACKAGE (TO-3) (Top View) COMMON oe OUTPUT (2) SS ORDER INFORMATION INPUT (1) OUTPUT ORDER VOLTAGE PART NO. 5V LM340-5DA 6V LM340-6DA av LM340-8DA 12V LM340-12DA 18V LM340-15DA 18V LM340-18DA 24v LM340-24DA 140 SqneticsLM340-DA,U ABSOLUTE MAXIMUM RATINGS PARAMETER RATING UNIT Input voltage Vo = 5V through 18V 35 Vv Vo = 24V 40 Vv Internal power dissipation! Internally limited Operating temperature range 0 to 70 C Maximum junction temperature TO-3 package 150 C TO-220 package 150 C Storage temperature range -65 to +150 C Lead temperature TO-3 package (soldering 10sec) 300 C TO-220 package (soldering, 10sec) 230 C NOTE 1, Thermal resistance without a heat sink for junction to case temperature is 4 C/W for the TO-3 package and 6C/W for the TO-220 package. Therrial resistance for case to ambient temperature is 35C/W for the TO-3 package and 59/W for the TO-220 package. DC ELECTRICAL CHARACTERISTICS tout = 500mA, (0C < Ta < 70C) unless otherwise specified. LM340-5 LM340-6 LM340-8 PARAMETER TEST CONDITIONS Min | Typ | Max | Min | Typ | Max | Min | Typ | Max UNIT Output voltage Ty = 25C VIN = 10V Vin = 11V Vin = 14V 48 | 5 | 52 |575 | 6 | 625 | 77 | 8 | 83 Vv Pp = < 15W 7V <= Vin = 20V 8V < Vin = 21V 10.5V <= Vin S 23V 5mA < lout $1.0 475 | | 525 | 57 | | 63 | 76 | | 8.4 Vv Line regulation Ty = 25C 7V < Vin = 25V 8V < Vin S 25V 10.5V <= Vin = 25V lout = 100mA 50 60 80 mV lout = 500MA 100 120 160 Load regulation Ty = 25C 5mA < lout = 1.5A 100 120 160 mV Quiescent current Ty = 25C 42 10 42 10 4.2 40 mA Quiescent current 7V < Vin S$ 25V 8V < Vin = 25V 10.5V < Vin < 25V A chan 1.3 13 1 m ge 5mA < lout <= 1.64 5 5 5 mA Output noise Ty = 25C voltage 10Hz < f < 100kHz 40 45 52 LA Voltage drift mvV/1000 Hrs. 20 a4 32 mV Ripple rejection louT = 20mA 7 55 f = 120Hz 60 08 Dropout voltage Ty = 25C 2 2 25 Vv 141 SinaticsDC ELECTRICAL CHARACTERISTICS LM340-DA,U (Cont'd) lout = 500mA, (0C < Ta S 70C) unless otherwise specified. 2.5 2.5 LM340-12 LM340-15 LM340-18 LM340-24 PARAMETER TEST CONDITIONS Min | Typ | Max |Min | Typ | Max Min | Typ | Max Min| Typ | Max UNIT Output voltage Ts = 28C Vin = 19V Vin = 23V Vin = 27V Vin = 33V 11.5| 12 | 125 [14.4] 15 |15.6/17.3| 18 [18.7] 23 | 24 | 25 Vv Pp =< 15W 14.5V < Vin < 27V 117.5V < Vin S$ 30V, 21V < Vin $ 33V| 27V < Vin S 38V 5mA = lout < 1.0A 11.4 | [12.6 |14.25| [15.75] 17.1 | | 18.9 {22.8 | |25.2 Vv Line regulation Ty = 25C 14.5V < Vin < 30V/17.5V < Vin S$ 30V| 21V< Vin S 33V| 27V < Vin S$ 38V lout = 100mA 120 450 180 240 mV lout = 500mA 240 300 360 480 mV Load regulation Ty = 25C 240 300 360 480 mV 5mA <= lout = 1.5A Quiescent current Ty = 26C 4.2] 10 4.2 | 10 4.2 | 10 4.2 | 10 mA 14.5V < Vin < 30V|17.5V < Vin < 30Vi 21V < Vin S$ 33V] 27V < Vin S$ 38V Quiescent current 1 4 1 1 mA change 5mA = lout = 1.5A 4 5 5 5 mA Output noise Ty = 25C voltage 10Hz < f < 100kHz 7 90 110 170 uv voltage drift mV/1000 Hrs. 48 60 72 96 mV Ripple rejection lout = 20mA 52 50 48 44 dB = 120Hz Dropout voitage Ty = 25C Vv 142 SiMOCS