LT3081 1.5A Single Resistor Rugged Linear Regulator with Monitors Fea T Descrip T n Extended Safe Operating Area The LT 3081 is a 1.5A low dropout linear regulator de- n Maximum Output Current: 1.5A signed for rugged industrial applications. Key features of n Stable with or without Input/Output Capacitors the IC are the extended safe operating area (SOA), output n Wide Input Voltage Range: 1.2V to 36V current monitor, temperature monitor and programmable n Single Resistor Sets Output Voltage current limit. The LT3081 can be paralleled for higher n Output Current Monitor: I = I /5000 output current or heat spreading. The device withstands MON OUT n Junction Temperature Monitor: 1A/C reverse input and reverse output-to-input voltages without n Output Adjustable to 0V reverse current flow. n 50A SET Pin Current: 1% Initial Accuracy The LT3081s precision 50A reference current source n Output Voltage Noise: 27V RMS allows a single resistor to program output voltage to n Parallel Multiple Devices for Higher Current or any level between zero and 34.5V. The current reference Heat Spreading architecture makes load regulation independent of output n Programmable Current Limit voltage. The LT3081 is stable with or without input and n Reverse-Battery and Reverse-Current Protection output capacitors. n <1mV Load Regulation Typical Independent of V OUT n The output current monitor (I /5000) and die junction <0.001%/V Line Regulation Typical OUT n temperature output (1A/C) provide system monitoring Available in Thermally-Enhanced 12-Lead 4mm 4mm and debug capability. In addition, a single resistor pro- DFN and 16-Lead TSSOP, 7-Lead DD-Pak and 7-Lead grams current limit. TO-220 Internal protection circuitry includes reverse-battery and a T reverse-current protection, current limiting and thermal n All Surface Mount Power Supply limiting. The LT3081 is offered in the 16-lead TSSOP (with n Rugged Industrial Power Supply exposed pad for improved thermal performance), 7-lead n Post Regulator for Switching Supplies TO-220, 7-lead DD-Pak, and an 12-lead 4mm 4mm DFN. n Low Output Voltage Supply L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Intrinsic Safety Applications Typical a T SET Pin Current 50.5 I = 5mA Wide Safe Operating Area Supply L 50.4 V IN 50.3 IN LT3081 50.2 50.1 I /5000 1A/C 50A LOAD 50.0 + 49.9 I OUT 49.8 OUT 1.5V 1A 49.7 I I MON TEMP SET LIM 300* 10F* 49.6 1k 1k 30.1k 4.53k 3081 TA01a 49.5 125 *OPTIONAL 50 25 0 25 50 75 100 150 TEMPERATURE (C) 3081 TA01b 3081fc 1 For more information www.linear.com/LT3081 SET PIN CURRENT (A) ion pplica ions pplica ion uresLT3081 a T e Maxi Mu M r a T (Note 1) All Voltages Relative to V . OUT IN Pin to OUT Pin Differential Voltage .....................40V Operating Junction Temperature Range (Note 2) SET Pin Current (Note 6) .....................................25mA E-, I-Grades ....................................... 40C to 125C SET Pin Voltage (Relative to OUT, Note 6) .............. 10V H-Grade ............................................. 40C to 150C TEMP Pin Voltage (Relative to OUT) .................1V, 40V MP-Grade .......................................... 55C to 150C I Pin Voltage (Relative to OUT) .........................0.2V Storage Temperature Range .................. 65C to 150C LIM I Pin Voltage (Relative to OUT) ...................1V, 40V Lead Temperature (Soldering, 10 sec) MON Output Short-Circuit Duration .......................... Indefinite FE, R, T7 Packages Only ...................................300C p c F T TOP VIEW OUT 1 16 OUT TOP VIEW OUT 2 15 IN OUT 1 12 IN OUT 3 14 IN OUT 2 11 IN OUT 4 13 IN OUT 3 10 IN 17 13 OUT OUT OUT 4 9 IN OUT 5 12 IN I 5 8 TEMP LIM I 6 11 TEMP LIM SET 6 7 I MON SET 7 10 I MON DF PACKAGE OUT 8 9 OUT 12-LEAD (4mm 4mm) PLASTIC DFN T = 125C, = 32C/W, = 4C/W JMAX JA JC FE PACKAGE EXPOSED PAD (PIN 13) IS OUT, MUST BE SOLDERED TO PCB 16-LEAD PLASTIC TSSOP T = 150C, = 29C/W, = 8C/W JMAX JA JC EXPOSED PAD (PIN 17) IS OUT, MUST BE SOLDERED TO PCB FRONT VIEW FRONT VIEW 7 NC NC 7 6 IN IN 6 5 TEMP TEMP 5 TAB IS TAB IS 4 OUT OUT 4 OUT OUT I 3 I 3 MON MON SET 2 SET 2 I 1 I 1 LIM LIM R PACKAGE T7 PACKAGE 7-LEAD PLASTIC DD 7-LEAD PLASTIC TO-220 T = 125C, = 15C/W, = 3C/W T = 150C, = 40C/W, = 3C/W JMAX JA JC JMAX JA JC 3081fc 2 For more information www.linear.com/LT3081 ion igura on in ings bsolu