LT138A

NOT RECOMMENDED FOR NEW DESIGNS

5A Positive Adjustable Voltage Regulator

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Overview

Guaranteed 1% Initial Tolerance
Guaranteed 0.3% Load Regulation
Guaranteed 5A Output Current
100% Thermal Limit Burn-In
12A Transient Output Current

The LT138A series of adjustable regulators provide 5A output current over an output voltage range of 1.2V to 32V. The internal voltage reference is trimmed to less than 1%, enabling a very tight output voltage. In addition to excellent line and load regulation, with full overload protection, the LT138A incorporates new current limiting circuitry allowing large transient load currents to be handled for short periods. Transient load currents of up to 12A can be supplied without limiting, eliminating the need for a large output capacitor.

The LT138A is an improved version of the popular LM138 with improved circuit design and advanced process techniques to provide superior performance and reliability.

The graph below shows the significant improvement in output voltage tolerance achieved by using the LT138A or LT338A.

Applications