LM338

OBSOLETE: FOR INFORMATION PURPOSES ONLY Contact Linear Technology for Potential Replacement Features nn Guaranteed 1% Initial Tolerance nn Guaranteed 0.3% Load Regulation nn Guaranteed 5A Output Current nn 100% Thermal Limit Burn-In nn 12A Transient Output Current Applications nn High Power Linear Regulator nn Battery Chargers nn Power Driver nn Constant-Current Regulator Typical Application Parallel Regulators for Higher Current* LT338A 0.01Ω∗∗ VIN VIN VOUT ADJ 5V 8A LT350A VIN VOUT ADJ 0.016Ω** 121Ω 1% 365Ω 1% 138/338 TA01 *THIS CIRCUIT WILL NOT WORK WITH LM VERSION DEVICES **CURRENT SHARING RESISTORS DEGRADE REGULATION TO 1% LT138A/LT338A LM138/LM338 5A Positive Adjustable Voltage Regulator Description The LT®138A 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 voltag...