LT1085 Datasheet – 3A Low Dropout Positive Fixed Regulator

Part Number: LT1085, LT1085CT-5

Function : 3A, Low Dropout Positive Fixed Regulator

Package: TO-220 and DD Type

Manufacturer: Linear Technology


LT1085 Positive Adjustable Regulator


The LT1085 series of positive adjustable regulators are designed to provide 7.5A, 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 1.5V at maximum output current, decreasing at lower load currents.
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 conditions. The LT1083 / LT1084 / LT1085 devices are pin compatible with older 3-terminal regulators. A 10μF output capacitor is required on these new devices. However, this is included in most regulator designs.


LT1085 datasheet pinout




1. 3-Terminal Adjustable

2. Output Current of 3A, 5A or 7.5A

3. Operates Down to 1V Dropout

4. Guaranteed Dropout Voltage at Multiple Current Levels

5. Line Regulation: 0.015%

6. Load Regulation: 0.1%

7. 100% Thermal Limit Functional Test

8. Fixed Versions Available


Official Homepage:


LT1085 Datasheet