Datasheet LT1083, LT1084, LT1085 (Analog Devices)

LT1083/LT1084/LT1085 7.5A, 5A, 3A Low Dropout Positive Adjustable Regulators
FeaTures DescripTion
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.
applicaTions
The LT1083/LT1084/LT1085 devices are pin compatible n High Efficiency Linear Regulators with older 3-terminal regulators. A 10µF 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 applicaTion Dropout Voltage vs Output Current 5V, 7.5A Regulator
2 VIN ≥ 6.5V IN LT1083 OUT 5V AT 7.5A ADJ 121Ω + 1% + 10µF 1 10µF* TANTALUM 365Ω 1% *REQUIRED FOR STABILITY 1083/4/5 ADJ TA01 INPUT/OUTPUT VOLTAGE DIFFERENTIAL (V) 0 0 IFULL LOAD OUTPUT CURRENT 1083/4/5 ADJ TA02 108345fh For more information www.linear.com/LT1083 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Block Diagram Applications Information Typical Application Package Description Revision History Typical Applications Related Parts