LT1083/LT1084/LT1085 7.5A, 5A, 3A Low Dropout Positive Adjustable Regulators Fea T Descrip T n 3-Terminal Adjustable The LT 1083 series of positive adjustable regulators are n Output Current of 3A, 5A or 7.5A designed to provide 7.5A, 5A and 3A with higher efficiency n Operates Down to 1V Dropout than currently available devices. All internal circuitry is n Guaranteed Dropout Voltage at Multiple Current Levels designed to operate down to 1V input-to-output differential n Line Regulation: 0.015% and the dropout voltage is fully specified as a function of n Load Regulation: 0.1% load current. Dropout is guaranteed at a maximum of 1.5V n 100% Thermal Limit Functional Test at maximum output current, decreasing at lower load cur- n Fixed Versions Available rents. On-chip trimming adjusts the reference voltage to n Available in 3-Lead Plastic TO-220 and DD Packages 1%. Current limit is also trimmed, minimizing the stress on both the regulator and power source circuitry under overload conditions. a T The LT1083/LT1084/LT1085 devices are pin compatible n High Efficiency Linear Regulators with older 3-terminal regulators. A 10F output capacitor n Post Regulators for Switching Supplies is required on these new devices. However, this is included n Constant Current Regulators in most regulator designs. n Battery Chargers Unlike PNP regulators, where up to 10% of the output cur- DEVICE OUTPUT CURRENT* rent is wasted as quiescent current, the LT1083 quiescent LT1083 7.5A current flows into the load, increasing efficiency. LT1084 5.0A LT1085 3.0A L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and UltraFast and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks *For a 1.5A low dropout regulator see the LT1086 data sheet. are the property of their respective owners. Typical a T Dropout Voltage vs Output Current 2 5V, 7.5A Regulator V 6.5V IN LT1083 OUT 5V AT 7.5A IN ADJ 121 + 1% + 1 10F 10F* TANTALUM 365 1% *REQUIRED FOR STABILITY 1083/4/5 ADJ TA01 0 0 I FULL LOAD OUTPUT CURRENT 1083/4/5 ADJ TA02 108345fh 1 For more information www.linear.com/LT1083 INPUT/OUTPUT VOLTAGE DIFFERENTIAL (V) ion pplica ions pplica ion uresLT1083/LT1084/LT1085 (Note 1) a Te Maxi Mu M r a T Power Dissipation ............................... Internally Limited M-Grades: (OBSOLETE) Input-to-Output Voltage Differential Control Section ............... 55C to 150C C-Grades ...............................................................30V Power Transistor .............55C to 200C I-Grades ................................................................30V Storage Temperature Range ..................65C to 150C M-Grades (OBSOLETE) ........................................35V Lead Temperature (Soldering, 10 sec) ...................300C Operating Junction Temperature Range (Note 9) C-Grades: Control Section ................... 0C to 125C p Di T Power Transistor ................. 0C to 150C 100% thermal shutdown functional test. I-Grades: Control Section ............... 40C to 125C Power Transistor ............. 40C to 150C p in c F T TAB IS FRONT VIEW OUTPUT FRONT VIEW 3 V IN 3 V IN TAB 2 V IS OUT 2 V OUT OUTPUT 1 ADJ 1 ADJ P PACKAGE T PACKAGE 3-LEAD PLASTIC TO-3P 3-LEAD PLASTIC TO-220 = 35C/W JA = 50C/W JA OBSOLETE PACKAGE BOTTOM VIEW FRONT VIEW CASE IS V IN OUTPUT 33 V IN TAB 2 IS 22 V OUT OUTPUT 1 ADJ 1 1 M PACKAGE ADJ 3-LEAD PLASTIC DD K PACKAGE = 30C/W* JA 2-LEAD TO-3 METAL CAN 2 *WITH PACKAGE SOLDERED TO 0.5IN COPPER AREA OVER = 35C/W JA BACKSIDE GROUND PLANE OR INTERNAL POWER PLANE. CAN VARY JA FROM 20C/W TO >40C/W DEPENDING ON MOUNTING TECHNIQUE OBSOLETE PACKAGE 108345fh 2 For more information www.linear.com/LT1083 ion igura on ioning recon ings bsolu