LT3083 Adjustable 3A Single Resistor Low Dropout Regulator FEATURES DESCRIPTION n Outputs May be Paralleled for Higher Current and The LT 3083 is a 3A low dropout linear regulator that can Heat Spreading be paralleled to increase output current or spread heat n Output Current: 3A on surface mounted boards. Architected as a precision n Single Resistor Programs Output Voltage current source and voltage follower, this new regulator n 50A Set Pin Current: 1% Initial Accuracy finds use in many applications requiring high current, n Output Adjustable to 0V adjustability to zero, and no heat sink. The device also n Low Output Noise: 40V (10Hz to 100kHz) brings out the collector of the pass transistor to allow RMS n Wide Input Voltage Range: 1.2V to 23V low dropout operationdown to 310mVwhen used (DD-Pak and TO-220 Packages) with multiple supplies. n Low Dropout Voltage: 310mV A key feature of the LT3083 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: 1mA grammed to any level between zero and 23V (DD-PAK n Stable with Minimum 10F Ceramic Capacitor and TO-220 packages). The LT3083 is stable with 10F of n Current Limit with Foldback and Overtemperature capacitance on the output, and the IC is stable with small Protection ceramic capacitors that do not require additional ESR as n Available in 16-Lead TSSOP, 12-Lead 4mm 4mm is common with other regulators. DFN, 5-Lead TO-220 and 5-Lead Surface Mount DD-PAK Packages Internal protection circuitry includes current limiting and thermal limiting. The LT3083 is offered in the 16-lead APPLICATIONS TSSOP (with an exposed pad for better thermal char- n acteristics), 12-lead 4mm 4mm DFN (also with an High Current All Surface Mount Supply n exposed pad), 5-lead TO-220, and 5-lead surface mount High Efficiency Linear Regulator n DD-PAKpackages. Post Regulator for Switching Supplies n All registered trademarks and trademarks are the property of their respective owners Low Parts Count Variable Voltage Supply n Low Output Voltage Power Supplies TYPICAL APPLICATION Set Pin Current Distribution 1.5V to 0.9V at 3A Supply (Using 3.3V V ) CONTROL N = 1052 V CONTROL 3.3V 4.7F V CONTROL V = 0.9V LT3083 V OUT IN IN OUT I = 3A 1.5V MAX * 10F 10F SET R MIN 3083 TA01a 909 *OPTIONAL FOR MINIMUM 1mA LOAD REQUIREMENT R SET 0.1F 18.2k 1% 49 49.5 50 50.5 51 SET PIN CURRENT DISTRIBUTION (A) 3083 TA01b Rev. B 1 Document Feedback For more information www.analog.comLT3083 ABSOLUTE MAXIMUM RATINGS (Note 1) All Voltages Relative to V OUT Output Short-Circuit Duration .......................... Indefinite CONTROL Pin Voltage .............................................28V Operating Junction Temperature Range (Notes 2, 10) IN Pin Voltage (T5, Q Packages) ....................18V, 0.3V E-, I-grades ........................................ 40C to 125C No Overload or Short-Circuit .....................23V, 0.3V MP-grade ........................................... 55C to 125C IN Pin Voltage (DF, FE Packages) .....................8V, 0.3V Storage Temperature Range .................. 65C to 150C No Overload or Short-Circuit .....................14V, 0.3V Lead Temperature (Soldering, 10 sec) SET Pin Current (Note 7) .....................................25mA T, Q, FE Packages Only .....................................300C SET Pin Voltage (Relative to OUT) .......................... 10V PIN CONFIGURATION TOP VIEW OUT 1 OUT 16 TOP VIEW OUT 2 IN 15 1 12 IN OUT OUT 3 IN 14 2 IN OUT 11 OUT 4 IN 13 3 IN OUT 13 10 17 OUT OUT 4 OUT 5 IN OUT 9 IN 12 OUT 5 8 V CONTROL OUT 6 V 11 CONTROL SET 6 7 V CONTROL SET 7 V 10 CONTROL DF PACKAGE OUT 8 OUT 9 12-LEAD (4mm 4mm) PLASTIC DFN T = 125C, = 37C/W, = 8C/W FE PACKAGE JMAX JA JC EXPOSED PAD (PIN 13) IS OUT, MUST BE SOLDERED TO PCB 16-LEAD PLASTIC TSSOP T = 125C, = 25C/W, = 8C/W JMAX JA JC EXPOSED PAD (PIN 17) IS OUT, MUST BE SOLDERED TO PCB FRONT VIEW FRONT VIEW 5 IN 5 IN 4 V 4 V CONTROL CONTROL TAB IS TAB IS 3 OUT 3 OUT OUT OUT 2 SET 2 SET 1 NC 1 NC Q PACKAGE T PACKAGE 5-LEAD PLASTIC DD-PAK 5-LEAD PLASTIC TO-220 T = 125C, = 15C/W, = 3C/W T = 125C, = 40C/W, = 3C/W JMAX JA JC JMAX JA JC ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3083EDF PBF LT3083EDF TRPBF 3083 12-Lead (4mm 4mm) Plastic DFN 40C to 125C LT3083EFE PBF LT3083EFE TRPBF 3083FE 16-Lead Plastic TSSOP 40C to 125C LT3083EQ PBF LT3083EQ TRPBF LT3083Q 5-Lead Plastic DD-PAK 40C to 125C LT3083ET PBF N/A LT3083T 5-Lead Plastic TO-220 40C to 125C LT3083IDF PBF LT3083IDF TRPBF 3083 12-Lead (4mm 4mm) Plastic DFN 40C to 125C LT3083IFE PBF LT3083IFE TRPBF 3083FE 16-Lead Plastic TSSOP 40C to 125C Rev. B 2 For more information www.analog.com