LT1083/LT1084/LT1085 - 7.5A, 5A, 3A Low Dropout Positive ...

1 LT1083/LT1084/LT10851108345fhFor more information , 5A, 3A Low DropoutPositive Adjustable RegulatorsThe LT 1083 series of Positive adjustable regulators are designed to provide , 5A and 3A with higher efficiency than currently available devices. All internal circuitry is designed to operate down to 1V input-to-output differential and the Dropout voltage is fully specified as a function of load current . Dropout is guaranteed at a maximum of at maximum output current , decreasing at lower load cur-rents. On-chip trimming adjusts the reference voltage to 1%. current limit is also trimmed, minimizing the stress on both the regulator and power source circuitry under overload LT1083/LT1084/LT1085 devices are pin compatible with older 3-terminal regulators. A 10 F output capacitor is required on these new devices. However, this is included in most regulator PNP regulators, where up to 10% of the output cur-rent is wasted as quiescent current , the LT1083 quiescent current flows into the load, increasing n3-Terminal Adjustable nOutput current of 3A, 5A or nOperates Down to 1V Dropout nGuaranteed Dropout Voltage at Multiple current Levels nLine Regulation: nLoad Regulation.

2 N100% Thermal Limit Functional Test nFixed Versions Available nAvailable in 3-Lead Plastic TO-220 and DD Packages nHigh Efficiency Linear Regulators nPost Regulators for Switching Supplies nConstant current Regulators nBattery ChargersDEVICEOUTPUT current *LT1083 LT1084 *For a low Dropout regulator see the LT1086 data 1%INOUTADJ365 1%10 F5V AT ADJ TA01+10 F*TANTALUM+*REQUIRED FOR STABILITY5V, RegulatorOUTPUT CURRENT0 INPUT/OUTPUT VOLTAGE DIFFERENTIAL (V)2101083/4/5 ADJ TA02 IFULL LOADD ropout Voltage vs Output CurrentL, LT, LT C, LT M, Linear Technology and the Linear logo are registered trademarks and UltraFast and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. LT1083/LT1084/LT10852108345fhFor more information MaxiMuM raTingsPower Dissipation.

3 Internally LimitedInput-to-Output Voltage Differential C- Grades ..30V I-Grades ..30V M-Grades (OBSOLETE) ..35 VOperating Junction Temper atur e Range (Note 9) C- Grades: Control Section ..0 C to 125 C Power Tr ansis tor ..0 C to 150 C I- Grades: Control Section .. 40 C to 125 C Power Tr ansis tor .. 40 C to 150 C M-Grades: (OBSOLETE) Control Section .. 55 C to 150 C Power Tr ansis tor .. 55 C to 200 CStorage Temper atur e Range .. 65 C to 150 CLead Temper atur e (Soldering, 10 sec) ..300 C100% thermal shutdown functional test.(Note 1)T PACKAGE3-LEAD PLASTIC TO-220 FRONT VIEWTABISOUTPUT321 VINVOUTADJ JA = 50 C/WVINVOUTADJP PACKAGE3-LEAD PLASTIC TO-3 PFRONT VIEWTAB ISOUTPUT321 JA = 35 C/WOBSOLETE PACKAGE12 VINCASE ISOUTPUTBOTTOM VIEWADJK PACKAGE2-LEAD TO-3 METAL CAN JA = 35 C/WOBSOLETE PACKAGEVINVOUTADJ321M PACKAGE3-LEAD PLASTIC DDFRONT VIEWTABISOUTPUT321 JA = 30 C/W**WITH PACKAGE SOLDERED TO COPPER AREA OVER BACKSIDE GROUND PLANE OR INTERNAL POWER PLANE.

4 JA CAN VARY FROM 20 C/W TO >40 C/W DEPENDING ON MOUNTING TECHNIQUEpin conFiguraTionLT1083/LT1084/LT10853108345 fhFor more information inForMaTionLEAD FREE FINISHTAPE AND REELPART MARKINGPACKAGE DESCRIPTIONTEMPERATURE RANGELT1083CP#PBFNALT1083CP3-Lead Plastic TO-3 PControl: 0 C to 125 C Power: 0 C to 150 CLT1084CP#PBFNALT1084CP3-Lead Plastic TO-3 PControl: 0 C to 125 C Power: 0 C to 150 COBSOLETE PACKAGELT1084CT#PBFNALT1084CT3-Lead Plastic TO-220 Control: 0 C to 125 C Power: 0 C to 150 CLT1084IT#PBFNALT1084IT3-Lead Plastic TO-220 Control: 40 C to 125 C Power: 40 C to 150 CLT1085CT#PBFNALT1085CT3-Lead Plastic TO-220 Control: 0 C to 125 C Power: 0 C to 150 CLT1085IT#PBFNALT1085IT3-Lead Plastic TO-220 Control: 40 C to 125 C Power: 40 C to 150 CLT1085CM#PBFLT1085CM#TRPBFLT1085CM3-Lea d Plastic DDControl: 0 C to 125 C Power: 0 C to 150 CLT1085IM#PBFLT1085IM#TRPBFLT1085IM3-Lea d Plastic DDControl: 40 C to 125 C Power: 40 C to 150 CLEAD BASED FINISHTAPE AND REELPART MARKINGPACKAGE DESCRIPTIONTEMPERATURE RANGELT1083 CPNALT1083CP3-Lead Plastic TO-3 PControl: 0 C to 125 C Power: 0 C to 150 CLT1084 CPNALT1084CP3-Lead Plastic TO-3 PControl: 0 C to 125 C Power: 0 C to 150 COBSOLETE PACKAGELT1084 CTNALT1084CT3-Lead Plastic TO-220 Control: 0 C to 125 C Power: 0 C to 150 CLT1084 ITNALT1084IT3-Lead Plastic TO-220 Control: 40 C to 125 C Power: 40 C to 150 CLT1085 CTNALT1085CT3-Lead Plastic TO-220 Control: 0 C to 125 C Power: 0 C to 150 CLT1085 ITNALT1085IT3-Lead Plastic TO-220 Control: 40 C to 125 C Power: 40 C to 150 CLT1085 CMLT1085CM#TRLT1085CM3-Lead Plastic DDControl: 0 C to 125 C Power: 0 C to 150 CLT1085 IMLT1085IM#TRLT1085IM3-Lead Plastic DDControl.

5 40 C to 125 C Power: 40 C to 150 CLT1083/LT1084/LT10854108345fhFor more information BASED FINISHTAPE AND REELPART MARKINGPACKAGE DESCRIPTIONTEMPERATURE RANGELT1083 CKNALT1083CK2-Lead TO-3 Metal CanControl: 0 C to 125 C Power: 0 C to 150 CLT1083 MKNALT1083MK2-Lead TO-3 Metal CanControl: 55 C to 150 C Power: 55 C to 200 CLT1084 CKNALT1084CK2-Lead TO-3 Metal CanControl: 0 C to 125 C Power: 0 C to 150 CLT1084 MKNALT1084MK2-Lead TO-3 Metal CanControl: 55 C to 150 C Power: 55 C to 200 CLT1085 CKNALT1085CK2-Lead TO-3 Metal CanControl: 0 C to 125 C Power: 0 C to 150 CLT1085 MKNALT1085MK2-Lead TO-3 Metal CanControl: 55 C to 150 C Power: 55 C to 200 COBSOLETE PACKAGEC onsult LTC Marketing for parts specified with wider operating temperature more information on lead free part marking, go to: For more information on tape and reel specifications, go to: inForMaTionLT1083/LT1084/LT10855108345fh For more information characTerisTics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 VoltageIOUT = 10mA, TJ = 25 C, (VIN VOUT) = 3V 10mA IOUT IFULL_LOAD (VIN VOUT) 25V (Notes 4, 6, 7) l V VLine RegulationILOAD = 10mA, (VIN VOUT) 15V, TJ = 25 C (Notes 2, 3) %M-Grade: 15V (VIN VOUT) 35V (Notes 2, 3) , I-Grades.

6 15V (VIN VOUT) 30V (Notes 2, 3) Regulation(VIN VOUT) = 3V, 10mA IOUT IFULL_LOAD, TJ = 25 C (Notes 2, 3, 4, 6) % Dropout Voltage VREF = 1%, IOUT = IFULL_LOAD (Notes 5, 6, 8) Limit LT1083 LT1084 LT1085 (VIN VOUT) = 5V (VIN VOUT) = 25V (VIN VOUT) = 5V (VIN VOUT) = 25V (VIN VOUT) = 5V (VIN VOUT) = 25V l l l l l l A A A A A AMinimum Load current (VIN VOUT) = 25Vl510mAThermal Regulation LT1083 LT1084 LT1085TA = 25 C, 30ms Pulse %/W %/W %/WRipple Rejectionf = 120Hz, CADJ = 25 F, COUT = 25 F Tantalum IOUT = IFULL_LOAD, (VIN VOUT) = 3V (Notes 6, 7, 8)l6075dBAdjust Pin CurrentTJ = 25 C l55 120 A AAdjust Pin current Change10mA IOUT IFULL_LOAD, (VIN VOUT) 25V (Note 6) ATemperature StabilityTA = 125 C, 1000 Output Noise (% of VOUT)TA = 25 C, 10Hz = f Resistance Junction-to-Case LT1083 LT1084 LT1085 Control Circuitry/Power Transistor K Package P Package K Package P Package T Package K Package M, T Package C/W C/W C/W C/W C/W C/W C/WLT1083/LT1084/LT10856108345fhFor more information characTerisTicsNote 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.

7 Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and 2: See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulation are measured at a constant junction temperature by low duty cycle pulse 3: Line and load regulation are guaranteed up to the maximum power dissipation (60W for the LT1083, 45W for the LT1084 (K, P), 30W for the LT1084 (T) and 30W for the LT1085). Power dissipation is determined by the input/output differential and the output current . Guaranteed maximum power dissipation will not be available over the full input/output voltage 4: IFULL_LOAD is defined in the current limit curves. The IFULL_LOAD curve is defined as the minimum value of current limit as a function of input-to-output voltage. Note that the 60W power dissipation for the LT1083 (45W for the LT1084 (K, P), 30W for the LT1084 (T), 30W for the LT1085) is only achievable over a limited range of input-to-output 5: Dropout voltage is specified over the full output current range of the device.

8 Test points and limits are shown on the Dropout Voltage 6: For LT1083 IFULL_LOAD is 5A for 55 C TJ < 40 C and for TJ 40 7: (VIN VOUT) 25V for LT1084 at 55 C TJ 40 8: Dropout is maximum for LT1084 at 55 C TJ 40 9: The LT1083/LT1084/LT1085 regulators are tested and specified under pulse load conditions such that TJ TA. The C-grade LT1083/LT1084/LT1085 are 100% tested at 25 I-grade LT1084/LT1085 are guaranteed over the full 40 C to 125 C operating ambient temperature range. LT1083/LT1084/LT10857108345fhFor more information perForMance characTerisTicsOUTPUT current (A)0 MINIMUM INPUT/OUTPUT DIFFERENTIAL (V)12LT1083/4/5 ADJ G01012345678910 INDICATES GUARANTEED TEST POINT 40 C TJ 150 C0 C TJ 125 CTJ = 150 CTJ = 25 CTJ = 55 CINPUT/OUTPUT DIFFERENTIAL (V)0 SHORT-CIRCUIT current (A)810121525LT1083/4/5 ADJ G02645102030352025 C150 CIFULL LOADGUARANTEED 55 CTEMPERATURE ( C) 50 VOLTAGE DEVIATION (%) ADJ 252575125 I = current (A)00 MINIMUN INPUT/OUTPUT DIFFERENTIAL (V)11234LT1083/4/5 ADJ G04526 INDICATES GUARANTEED TEST POINT 55 C TJ 150 C0 C TJ 125 CTJ = 150 CTJ = 55 CTJ = 25 CINPUT/OUTPUT DIFFERENTIAL (V)00 SHORT-CIRCUIT current (A)1345107102025LT1083/4/5 ADJ G052896515303525 C 55 C150 CGUARANTEEDIFULL LOADTEMPERATURE ( C) 50 VOLTAGE DEVIATION (%)

9 0050100150LT1083/4/5 ADJ G06 252575125 I = 5 ATEMPERATURE ( C) 50 VOLTAGE DEVIATION (%)0050100150LT1083/4/5 ADJ G09 252575125 I = 3 AINPUT/OUTPUT DIFFERENTIAL (V)0 SHORT-CIRCUIT current (A)4561525LT1083/4/5 ADJ G08 325102030351025 C 55 CIFULL LOADGUARANTEED150 COUTPUT current (A)00 MINIMUM INPUT/OUTPUT DIFFERENTIAL (V)1212LT1083/4/5 ADJ G0734 INDICATES GUARANTEED TEST POINTTJ = 150 CTJ = 25 C 55 C TJ 150 CTJ = 55 C0 C TJ 125 CLT1083 Dropout VoltageLT1083 Short-Circuit CurrentLT1083 Load RegulationLT1084 Dropout VoltageLT1084 Short-Circuit CurrentLT1084 Load RegulationLT1085 Dropout VoltageLT1085 Short-Circuit CurrentLT1085 Load RegulationLT1083/LT1084/LT10858108345fhF or more information perForMance characTerisTicsINPUT/OUTPUT DIFFERENTIAL (V)00 MINIMUM OPERATING current (mA)1345107102025LT1083/4/5 ADJ G1028965153035TJ = 55 CTJ = 150 CTJ = 25 CTEMPERATURE ( C) VOLTAGE (V)050100150LT1083/4/5 ADJ G11 252575125 TEMPERATURE ( C) 501009080706050403020100 ADJUST PIN current ( A)050100150LT1083/4/5 ADJ G12 252575125 FREQUENCY (Hz)RIPPLE REJECTION (dB)1009080706050403020100101k10k100k108 3/4/5 ADJ G13100 VRIPPLE 3VP-P(VIN VOUT) 3V(VIN VOUT) VDROPOUTCADJ = 200 F AT FREQUENCIES < 60 HzCADJ = 25 F AT FREQUENCIES > 60 HzIOUT = 7 AOUTPUT current (A)0 RIPPLE REJECTION (dB) 10090807060504030201002451083/4/5 ADJ G1413678 VOUT = 5 VCADJ = 25 FCOUT = 25 FfR = 120 HzVRIPPLE 3VP-PfR = 20kHzVRIPPLE TEMPERATURE ( C)50 POWER (W)1009080706050403020100LT1083/4/5 ADJ G1560 70 80 90 100 110 120 130 140 150LT1083 MKLT1083 CPLT1083CK* AS LIMITED BY MAXIMUM JUNCTION TEMPERATUREFREQUENCY (Hz)

10 RIPPLE REJECTION (dB)1009080706050403020100101k10k100k108 3/4/5 ADJ G16100 VRIPPLE 3VP-P(VIN VOUT) 3V(VIN VOUT) VDROPOUTCADJ = 200 F AT FREQUENCIES < 60 HzCADJ = 25 F AT FREQUENCIES > 60 HzIOUT = 5 AOUTPUT current (A)0 RIPPLE REJECTION (dB) 10090807060504030201002451083/4/5 ADJ G1713 VOUT = 5 VCADJ = 25 FCOUT = 25 FfR = 120 HzVRIPPLE 3VP-PfR = 20kHzVRIPPLE TEMPERATURE ( C)50 POWER (W)6050403020100LT1083/4/5 ADJ G1860 70 80 90 100 110 120 130 140 150LT1084 MKLT1084 CTLT1084CP* AS LIMITED BY MAXIMUM JUNCTION TEMPERATURELT1084 CKMinimum Operating CurrentTemperature StabilityAdjust Pin CurrentLT1083 Ripple RejectionLT1083 Ripple Rejection vs CurrentLT1083 Maximum Power Dissipation*LT1084 Maximum Power Dissipation*LT1084 Ripple Rejection vs CurrentLT1084 Ripple RejectionLT1083/LT1084/LT10859108345fhFo r more information perForMance characTerisTicsTIME ( s)0 OUTPUT VOLTAGEDEVIATION (V)LOAD current (A) ADJ G24100 CADJ = 0 CADJ = 1 FCIN = 1 FCOUT = 10 F TANTALUMVOUT=10 VVIN=13 VPRELOAD=100mAFREQUENCY (Hz)RIPPLE REJECTION (dB)1009080706050403020100101k10k100k108 3/4/5 ADJ G19 100 VRIPPLE 3VP-P(VIN VOUT) 3V(VIN VOUT)