LT3080 - Adjustable 1.1A Single Resistor Low Dropout …

1 Single Resistor Low Dropout RegulatorThe LT 3080 is a low Dropout linear regulator that can be paralleled to increase output current or spread heat in surface mounted boards. Architected as a precision cur-rent source and voltage follower allows this new regulator to be used in many applications requiring high current, adjustability to zero, and no heat sink. Also the device brings out the collector of the pass transistor to allow low Dropout operation down to 350 millivolts when used with multiple key feature of the LT3080 is the capability to supply a wide output voltage range.

2 By using a reference current through a Single Resistor , the output voltage is programmed to any level between zero and 36V. The LT3080 is stable with F of capacitance on the output, and the IC uses small ceramic capacitors that do not require additional ESR as is common with other regulators. Internal protection circuitry includes current limiting and thermal limiting. The LT3080 regulator is offered in the 8-lead MSOP (with an exposed pad for better thermal characteristics), a 3mm 3mm DFN, 5-lead DD-Pak, TO-220 and a simple-to-use 3-lead SOT-223 High Current All Surface Mount Supplyn High Efficiency Linear Regulatorn Post Regulator for Switching Suppliesn Low Parts Count Variable Voltage Supplyn Low Output Voltage Power Suppliesn Outputs May be Paralleled for Higher Current and Heat Spreadingn Output Current.

3 Single Resistor Programs Output Voltagen 1% Initial Accuracy of SET Pin Currentn Output Adjustable to 0Vn Low Output Noise: 40 VRMS (10Hz to 100kHz)n Wide Input Voltage Range: to 36Vn Low Dropout Voltage: 350mV (Except SOT-223 Package)n <1mV Load Regulationn < Line Regulationn Minimum Load Current: Stable with F Minimum Ceramic Output Capacitorn Current Limit with Foldback and Overtemperature Protectedn Available in 8-Lead MSOP, 3mm 3mm DFN, 5-Lead DD-Pak, TO-220 and 3-Lead SOT-223 Variable Output Voltage Supply+ TO 36 VVCONTROLOUT3080 TA01aSET1 FRSETVOUT = RSET 10 AVOUTSet Pin Current DistributionSET PIN CURRENT DISTRIBUTION ( A) = 13792 Typical applicaTionDescripTionFeaTuresapplicaTio nsL, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and VLDO and ThinSOT are trademarks of Linear Technology Corporation.

4 All other trademarks are the property of their respective owners. LT308023080fcabsoluTe MaxiMuM raTingsVCONTROL Pin Voltage ..40V, Pin Voltage ..40V, Pin Current (Note 7) .. 10mASET Pin Voltage (Relative to OUT) .. Short-Circuit Duration ..Indefinite(Note 1)(All Voltages Relative to VOUT)TOP VIEW9 OUTDD PACKAGE8-LEAD (3mm 3mm) PLASTIC DFN56784321 OUTOUTOUTSETININNCVCONTROLTJMAX = 125 C, JA = 64 C/W, JC = 3 C/WEXPOSED PAD (PIN 9) IS OUT, MUST BE SOLDERED TO PCB1234 OUTOUTOUTSET8765 ININNCVCONTROLTOP VIEWMS8E PACKAGE8-LEAD PLASTIC MSOP9 OUT TJMAX = 125 C, JA = 60 C/W, JC = 10 C/WEXPOSED PAD (PIN 9)

5 IS OUT, MUST BE SOLDERED TO PCBQ PACKAGE5-LEAD PLASTIC DD-PAKTAB ISOUTFRONT VIEWINVCONTROLOUTSETNC54321 TJMAX = 125 C, JA = 30 C/W, JC = 3 C/WT PACKAGE5-LEAD PLASTIC TO-220 INVCONTROLOUTSETNCFRONT VIEW54321 TAB ISOUTTJMAX = 125 C, JA = 40 C/W, JC = 3 C/W321 FRONT VIEWTAB ISOUTIN*OUTSETST PACKAGE3-LEAD PLASTIC SOT-223*IN IS VCONTROL AND IN TIED TOGETHERTJMAX = 125 C, JA = 55 C/W, JC = 15 C/WOperating Junction Temperature Range (Notes 2, 10)E-, I-Grades .. 40 C to 125 CStorage Temperature Range: .. 65 C to 150 CLead Temperature (Soldering, 10 sec) MS8E, Q, T and ST Packages Only.

6 300 Cpin conFiguraTionLT308033080fcorDer inForMaTionLEAD FREE FINISHTAPE AND REEL PART MARKING*PACKAGE DESCRIPTIONTEMPERATURE RANGELT3080 EDD#PBFLT3080 EDD#TRPBFLCBN8-Lead (3mm x 3mm) Plastic DFN 40 C to 125 CLT3080 IDD#PBFLT3080 IDD#TRPBFLCBN8-Lead (3mm x 3mm) Plastic DFN 40 C to 125 CLT3080 EMS8E#PBFLT3080 EMS8E#TRPBFLTCBM8-Lead Plastic MSOP 40 C to 125 CLT3080 IMS8E#PBFLT3080 IMS8E#TRPBFLTCBM8-Lead Plastic MSOP 40 C to 125 CLT3080EQ#PBFLT3080EQ#TRPBFLT3080Q5-Lead Plastic DD-Pak 40 C to 125 CLT3080IQ#PBFLT3080IQ#TRPBFLT3080Q5-Lead Plastic DD-Pak 40 C to 125 CLT3080ET#PBFLT3080ET#TRPBFLT3080ET5-Lea d Plastic TO-220 40 C to 125 CLT3080IT#PBFLT3080IT#TRPBFLT3080ET5-Lea d Plastic TO-220 40 C to 125 CLT3080 EST#PBFLT3080 EST#TRPBF30803-Lead Plastic SOT-223 40 C to 125 CLT3080 IST#PBFLT3080 IST#TRPBF30803-Lead Plastic SOT-223 40 C

7 To 125 CLEAD BASED FINISHTAPE AND REEL PART MARKING*PACKAGE DESCRIPTIONTEMPERATURE RANGELT3080 EDDLT3080 EDD#TRLCBN8-Lead (3mm x 3mm) Plastic DFN 40 C to 125 CLT3080 IDDLT3080 IDD#TRLCBN8-Lead (3mm x 3mm) Plastic DFN 40 C to 125 CLT3080 EMS8 ELT3080 EMS8E#TRLTCBM8-Lead Plastic MSOP 40 C to 125 CLT3080 IMS8 ELT3080 IMS8E#TRLTCBM8-Lead Plastic MSOP 40 C to 125 CLT3080 EQLT3080EQ#TRLT3080Q5-Lead Plastic DD-Pak 40 C to 125 CLT3080 IQLT3080IQ#TRLT3080Q5-Lead Plastic DD-Pak 40 C to 125 CLT3080 ETLT3080ET#TRLT3080ET5-Lead Plastic TO-220 40 C to 125 CLT3080 ITLT3080IT#TRLT3080ET5-Lead Plastic TO-220 40 C to 125 CLT3080 ESTLT3080 EST#TR30803-Lead Plastic SOT-223 40 C to 125 CLT3080 ISTLT3080 IST#TR30803-Lead Plastic SOT-223 40 C to 125 CConsult LTC Marketing for parts specified

8 With wider operating temperature ranges. *The temperature grade is identified by a label on the shipping more information on lead free part marking, go to: For more information on tape and reel specifications, go to: Pin CurrentISETVIN = 1V, VCONTROL = , ILOAD = 1mA, TJ = 25 C VIN 1V, VCONTROL , 1mA ILOAD (Note 9) A AOutput Offset Voltage (VOUT VSET) VIN = 1V, VCONTROL = 2V, IOUT = 1mAVOSDFN and MSOP Package l 2 mVSOT-223, DD-Pak and T0-220 Package l 5 65 6mV mVLoad Regulation ISET VOS ILOAD = 1mA to ILOAD = 1mA to (Note 8) l mVLine Regulation (Note 9) DFN and MSOP Package ISET VOSVIN = 1V to 25V, VCONTROL = 2V to 25V, ILOAD = 1mA VIN = 1V to 25V, VCONTROL = 2V to 25V, ILOAD = 1mAl mV/VLine Regulation (Note 9)

9 SOT-223, DD-Pak and T0-220 Package ISET VOSVIN = 1V to 26V, VCONTROL = 2V to 26V, ILOAD = 1mA VIN = 1V to 26V, VCONTROL = 2V to 26V, ILOAD = mV/VMinimum Load Current (Notes 3, 9)VIN = VCONTROL = 10V VIN = VCONTROL = 25V (DFN and MSOP Package) VIN = VCONTROL = 26V (SOT-223, DD-Pak and T0-220 Package)l l l300500 1 1 A mA mAVCONTROL Dropout Voltage (Note 4)ILOAD = 100mA ILOAD = VVIN Dropout Voltage (Note 4)ILOAD = 100mA ILOAD = l100 350200 500mV mVVCONTROL Pin CurrentILOAD = 100mA ILOAD = l4 176 30mA mACurrent LimitVIN = 5V, VCONTROL = 5V, VSET = 0V, VOUT = 0.

10 Amplifier RMS Output Noise (Note 6)ILOAD = , 10Hz f 100kHz, COUT = 10 F, CSET = F40 VRMSR eference Current RMS Output Noise (Note 6)10Hz f 100kHz1nARMSR ipple Rejectionf = 120Hz, VRIPPLE = , ILOAD = , CSET = F, COUT = F f = 10kHz f = 1 MHz75 55 20dB dB dBThermal Regulation, ISET10ms 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and 2: Unless otherwise specified, all voltages are with respect to VOUT.