LT3080 Adjustable1.1A Single Resistor Low Dropout Regulator FEATURES DESCRIPTION n Outputs May Be Paralleled for Higher Current The LT 3080 is a 1.1A low dropout linear regulator that andHeat Spreading can be paralleled to increase output current or spread n Output Current: 1.1A heat in surface mounted boards. Architected as a preci- n Single Resistor Programs Output Voltage sion current source and voltage follower allows this new n 1% Initial Accuracy of SET Pin Current regulator to be used in many applications requiring high n Output Adjustable to 0V current, adjustability to zero, and no heat sink. Also the n Low Output Noise: 40V (10Hz to 100kHz) device brings out the collector of the pass transistor to RMS n Wide Input Voltage Range: 1.2V to 36V allow low dropout operation down to 350 millivolts n Low Dropout Voltage: 350mV (Except when used with multiple supplies. SOT-223Package) A key feature of the LT3080 is the capability to supply n <1mV Load Regulation a wide output voltage range. By using a reference cur- n <0.001%/V Line Regulation rent through a single resistor, the output voltage is pro- n Minimum Load Current: 0.5mA grammed to any level between zero and 36V. The LT3080 n Stable with 2.2F Minimum Ceramic Output Capacitor is stable with 2.2F of capacitance on the output, and n Current Limit with Foldback and Overtemperature the IC uses small ceramic capacitors that do not require Protected additional ESR as is common with other regulators. n Available in 8-Lead MSOP, 3mm 3mm DFN, n Internal protection circuitry includes current limiting and 5-Lead DD-Pak, TO-220 and 3-Lead SOT-223 n thermal limiting. The LT3080 regulator is offered in the AEC-Q100 Qualified for Automotive Applications 8-lead MSOP (with an exposed pad for better thermal characteristics), a 3mm 3mm DFN, 5- lead DD-Pak, APPLICATIONS TO-220 and a simple-to-use 3-lead SOT-223 version. n High Current All Surface Mount Supply All registered trademarks and trademarks are the property of their respective owners. n High Efficiency Linear Regulator n Post Regulator for Switching Supplies n Low Parts Count Variable Voltage Supply n Low Output Voltage Power Supplies Set Pin Current Distribution TYPICAL APPLICATION Variable Output Voltage 1.1A Supply N = 13792 IN LT3080 V IN 1.2V TO 36V V CONTROL + 1F OUT V OUT SET 2.2F R SET V = R 10A OUT SET 9.80 9.90 10.00 10.10 10.20 3080 TA01a SET PIN CURRENT DISTRIBUTION (A) 3080 G02 Rev. D 1 Document Feedback For more information www.analog.comLT3080 ABSOLUTE MAXIMUM RATINGS (Note 1)(All Voltages Relative to V ) OUT V Pin Voltage ....................................40V, 0.3V Operating Junction Temperature Range (Notes 2, 10) CONTROL IN Pin Voltage ................................................40V, 0.3V E-, I-Grade ............................................. 40C to 125C SET Pin Current (Note 7) ..................................... 10mA Storage Temperature Range .................. 65C to 150C SET Pin Voltage (Relative to OUT) .........................0.3V Lead Temperature (Soldering, 10 sec) Output Short-Circuit Duration .......................... Indefinite MS8E, Q, T and ST Packages Only ...................300C PIN CONFIGURATION TOP VIEW FRONT VIEW TOP VIEW 5 IN OUT 1 8 IN OUT 1 8 IN 4 V CONTROL OUT 2 7 IN OUT 2 9 7 IN 9 TAB IS 3 OUT OUT 3 OUT 6 NC OUT OUT NC 3 6 OUT SET 4 5 V CONTROL 2 SET SET V 4 5 CONTROL MS8E PACKAGE 1 NC 8-LEAD PLASTIC MSOP Q PACKAGE DD PACKAGE T = 125C, = 60C/W, = 10C/W 5-LEAD PLASTIC DD-PAK 8-LEAD (3mm 3mm) PLASTIC DFN JMAX JA JC EXPOSED PAD (PIN 9) IS OUT, MUST BE SOLDERED TO PCB T = 125C, = 64C/W, = 3C/W T = 125C, = 30C/W, = 3C/W JMAX JA JC JMAX JA JC EXPOSED PAD (PIN 9) IS OUT, MUST BE SOLDERED TO PCB FRONT VIEW FRONT VIEW 3 IN* 5 IN TAB IS 4 V CONTROL TAB IS 2 OUT OUT 3 OUT OUT 2 SET 1 SET 1 NC ST PACKAGE T PACKAGE 3-LEAD PLASTIC SOT-223 5-LEAD PLASTIC TO-220 *IN IS V AND IN TIED TOGETHER CONTROL T = 125C, = 40C/W, = 3C/W JMAX JA JC T = 125C, = 55C/W, = 15C/W JMAX JA JC Rev. D 2 For more information www.analog.com