LT3080 - Adjustable 1.1A Single Resistor Low …

1 LT3080 . Single Resistor Low Dropout Regulator Features Description n Outputs May be Paralleled for Higher Current and The LT 3080 is a low dropout linear regulator that can Heat Spreading be paralleled to increase output current or spread heat in n Output Current: surface mounted boards. Architected as a precision cur- n Single Resistor Programs Output Voltage rent source and voltage follower allows this new regulator n 1% Initial Accuracy of SET Pin Current to be used in many applications requiring high current, n Output Adjustable to 0V adjustability to zero, and no heat sink. Also the device n Low Output Noise: 40 V. RMS (10Hz to 100kHz) brings out the collector of the pass transistor to allow low n Wide Input Voltage Range: to 36V dropout operation down to 350 millivolts when used n Low Dropout Voltage: 350mV (Except SOT-223 with multiple supplies. Package). n <1mV Load Regulation A key feature of the LT3080 is the capability to supply a n < Line Regulation wide output voltage range.

2 By using a reference current n Minimum Load Current: through a Single Resistor , the output voltage is programmed n Stable with F Minimum Ceramic Output Capacitor to any level between zero and 36V. The LT3080 is stable n Current Limit with Foldback and Overtemperature with F of capacitance on the output, and the IC uses small ceramic capacitors that do not require additional Protected n Available in 8-Lead MSOP, 3mm 3mm DFN, ESR as is common with other regulators. 5-Lead DD-Pak, TO-220 and 3-Lead SOT-223 Internal protection circuitry includes current limiting and thermal limiting. The LT3080 regulator is offered in the Applications 8-lead MSOP (with an exposed pad for better thermal n High Current All Surface Mount Supply characteristics), a 3mm 3mm DFN, 5-lead DD-Pak, n High Efficiency Linear Regulator TO-220 and a simple-to-use 3-lead SOT-223 version. n Post Regulator for Switching Supplies L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and VLDO.

3 And ThinSOT are trademarks of Linear Technology Corporation. All other trademarks are the n Low Parts Count Variable Voltage Supply property of their respective owners. n Low Output Voltage Power Supplies Typical Application Set Pin Current Distribution Variable Output Voltage Supply N = 13792. VIN IN LT3080 . TO 36V. VCONTROL. +. 1 F . OUT. VOUT. SET. F. RSET. VOUT = RSET 10 A 3080 TA01a SET PIN CURRENT DISTRIBUTION ( A). 3080 G02. 3080fc 1. LT3080 . Absolute Maximum Ratings (Note 1)(All Voltages Relative to VOUT). VCONTROL Pin 40V, Operating Junction Temperature Range (Notes 2, 10). IN Pin 40V, E-, 40 C to 125 C. SET Pin Current (Note 7).. 10mA Storage Temperature Range:.. 65 C to 150 C. SET Pin Voltage (Relative to OUT).. Lead Temperature (Soldering, 10 sec). Output Short-Circuit Indefinite MS8E, Q, T and ST Packages 300 C. Pin Configuration TOP VIEW. FRONT VIEW. TOP VIEW. OUT 1 8 IN 5 IN. OUT 1 8 IN. OUT 2 7 IN 4 VCONTROL. 9 OUT 2 9 7 IN.

4 TAB IS. OUT 3 OUT 6 NC OUT 3 OUT 6 NC 3 OUT. OUT. SET 4 5 VCONTROL 2 SET. SET 4 5 VCONTROL. MS8E PACKAGE 1 NC. 8-LEAD PLASTIC MSOP. DD PACKAGE TJMAX = 125 C, JA = 60 C/W, JC = 10 C/W Q PACKAGE. 8-LEAD (3mm 3mm) PLASTIC DFN 5-LEAD PLASTIC DD-PAK. EXPOSED PAD (PIN 9) IS OUT, MUST BE SOLDERED TO PCB. TJMAX = 125 C, JA = 64 C/W, JC = 3 C/W TJMAX = 125 C, JA = 30 C/W, JC = 3 C/W. EXPOSED PAD (PIN 9) IS OUT, MUST BE SOLDERED TO PCB. FRONT VIEW. FRONT VIEW. 3 IN*. 5 IN. 4 VCONTROL TAB IS. TAB IS OUT 2 OUT. OUT 3 OUT. 2 SET 1 SET. 1 NC. ST PACKAGE. T PACKAGE 3-LEAD PLASTIC SOT-223. 5-LEAD PLASTIC TO-220 *IN IS VCONTROL AND IN TIED TOGETHER. TJMAX = 125 C, JA = 40 C/W, JC = 3 C/W. TJMAX = 125 C, JA = 55 C/W, JC = 15 C/W. 3080fc 2. LT3080 . Order Information LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE. LT3080 EDD#PBF LT3080 EDD#TRPBF LCBN 8-Lead (3mm x 3mm) Plastic DFN 40 C to 125 C. LT3080 IDD#PBF LT3080 IDD#TRPBF LCBN 8-Lead (3mm x 3mm) Plastic DFN 40 C to 125 C.

5 LT3080 EMS8E#PBF LT3080 EMS8E#TRPBF LTCBM 8-Lead Plastic MSOP 40 C to 125 C. LT3080 IMS8E#PBF LT3080 IMS8E#TRPBF LTCBM 8-Lead Plastic MSOP 40 C to 125 C. LT3080EQ#PBF LT3080EQ#TRPBF LT3080Q 5-Lead Plastic DD-Pak 40 C to 125 C. LT3080IQ#PBF LT3080IQ#TRPBF LT3080Q 5-Lead Plastic DD-Pak 40 C to 125 C. LT3080ET#PBF LT3080ET#TRPBF LT3080ET 5-Lead Plastic TO-220 40 C to 125 C. LT3080IT#PBF LT3080IT#TRPBF LT3080ET 5-Lead Plastic TO-220 40 C to 125 C. LT3080 EST#PBF LT3080 EST#TRPBF 3080 3-Lead Plastic SOT-223 40 C to 125 C. LT3080 IST#PBF LT3080 IST#TRPBF 3080 3-Lead Plastic SOT-223 40 C to 125 C. LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE. LT3080 EDD LT3080 EDD#TR LCBN 8-Lead (3mm x 3mm) Plastic DFN 40 C to 125 C. LT3080 IDD LT3080 IDD#TR LCBN 8-Lead (3mm x 3mm) Plastic DFN 40 C to 125 C. LT3080 EMS8E LT3080 EMS8E#TR LTCBM 8-Lead Plastic MSOP 40 C to 125 C. LT3080 IMS8E LT3080 IMS8E#TR LTCBM 8-Lead Plastic MSOP 40 C to 125 C.

6 LT3080EQ LT3080EQ#TR LT3080Q 5-Lead Plastic DD-Pak 40 C to 125 C. LT3080IQ LT3080IQ#TR LT3080Q 5-Lead Plastic DD-Pak 40 C to 125 C. LT3080ET LT3080ET#TR LT3080ET 5-Lead Plastic TO-220 40 C to 125 C. LT3080IT LT3080IT#TR LT3080ET 5-Lead Plastic TO-220 40 C to 125 C. LT3080 EST LT3080 EST#TR 3080 3-Lead Plastic SOT-223 40 C to 125 C. LT3080 IST LT3080 IST#TR 3080 3-Lead Plastic SOT-223 40 C to 125 C. Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: For more information on tape and reel specifications, go to: 3080fc 3. LT3080 . Electrical The Characteristics l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 C. (Note 11). PARAMETER CONDITIONS MIN TYP MAX UNITS. SET Pin Current ISET VIN = 1V, VCONTROL = , ILOAD = 1mA, TJ = 25 C 10 A.

7 VIN 1V, VCONTROL , 1mA ILOAD (Note 9) l 10 A. Output Offset Voltage (VOUT VSET) VOS DFN and MSOP Package 2 2 mV. VIN = 1V, VCONTROL = 2V, IOUT = 1mA l mV. SOT-223, DD-Pak and T0-220 Package 5 5 mV. l 6 6 mV. Load Regulation ISET ILOAD = 1mA to nA. VOS ILOAD = 1mA to (Note 8) l mV. Line Regulation (Note 9) ISET VIN = 1V to 25V, VCONTROL = 2V to 25V, ILOAD = 1mA l nA/V. DFN and MSOP Package VOS VIN = 1V to 25V, VCONTROL = 2V to 25V, ILOAD = 1mA mV/V. Line Regulation (Note 9) ISET VIN = 1V to 26V, VCONTROL = 2V to 26V, ILOAD = 1mA l nA/V. SOT-223, DD-Pak and T0-220 Package VOS VIN = 1V to 26V, VCONTROL = 2V to 26V, ILOAD = 1mA mV/V. Minimum Load Current (Notes 3, 9) VIN = VCONTROL = 10V l 300 500 A. VIN = VCONTROL = 25V (DFN and MSOP Package) l 1 mA. VIN = VCONTROL = 26V (SOT-223, DD-Pak and T0-220 Package) l 1 mA. VCONTROL Dropout Voltage (Note 4) ILOAD = 100mA V. ILOAD = l V. VIN Dropout Voltage (Note 4) ILOAD = 100mA l 100 200 mV.

8 ILOAD = l 350 500 mV. VCONTROL Pin Current ILOAD = 100mA l 4 6 mA. ILOAD = l 17 30 mA. Current Limit VIN = 5V, VCONTROL = 5V, VSET = 0V, VOUT = l A. Error Amplifier RMS Output Noise (Note 6) ILOAD = , 10Hz f 100kHz, COUT = 10 F, CSET = F 40 VRMS. Reference Current RMS Output Noise (Note 6) 10Hz f 100kHz 1 nARMS. Ripple Rejection f = 120Hz, VRIPPLE = , ILOAD = , CSET = F, COUT = F 75 dB. f = 10kHz 55 dB. f = 1 MHz 20 dB. Thermal Regulation, ISET 10ms Pulse %/W. Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 6: Output noise is lowered by adding a small capacitor across the may cause permanent damage to the device. Exposure to any Absolute voltage setting Resistor . Adding this capacitor bypasses the voltage setting Maximum Rating condition for extended periods may affect device Resistor shot noise and reference current noise; output noise is then equal reliability and lifetime. to error amplifier noise (see Applications Information section).

9 Note 2: Unless otherwise specified, all voltages are with respect to VOUT. Note 7: SET pin is clamped to the output with diodes. These diodes only The LT3080 is tested and specified under pulse load conditions such that carry current under transient overloads. TJ TA. The LT3080E is tested at TA = 25 C. Performance of the LT3080E Note 8: Load regulation is Kelvin sensed at the package. over the full 40 C and 125 C operating temperature range is assured by Note 9: Current limit may decrease to zero at input-to-output differential design, characterization, and correlation with statistical process controls. voltages (VIN VOUT) greater than 25V (DFN and MSOP package) or 26V. The LT3080I is guaranteed over the full 40 C to 125 C operating junction (SOT-223, DD-Pak and T0-220 Package). Operation at voltages for both IN. temperature range. and VCONTROL is allowed up to a maximum of 36V as long as the difference Note 3: Minimum load current is equivalent to the quiescent current of between input and output voltage is below the specified differential the part.

10 Since all quiescent and drive current is delivered to the output (VIN VOUT) voltage. Line and load regulation specifications are not of the part, the minimum load current is the minimum current required to applicable when the device is in current limit. maintain regulation. Note 10: This IC includes overtemperature protection that is intended Note 4: For the LT3080 , dropout is caused by either minimum control to protect the device during momentary overload conditions. Junction voltage (VCONTROL) or minimum input voltage (VIN). Both parameters are temperature will exceed the maximum operating junction temperature when specified with respect to the output voltage. The specifications represent the overtemperature protection is active. Continuous operation above the specified minimum input-to-output differential voltage required to maintain regulation. maximum operating junction temperature may impair device reliability. Note 5: The VCONTROL pin current is the drive current required for the Note 11: The SOT-223 package connects the IN and VCONTROL pins output transistor.