AS2954 Datasheet | Sipex Corporation

FEATURES - Output Accuracy 5V, 3.3V,@ 250m A Output - Very Low Quiescent Current - Low Dropout Voltage - Extremely Tight Load And Line Regulation - Very Low Temperature Coefficient - Current & Thermal Limiting - Improved Replacement With Hight IOUT For LP2954 Sockets APPLICATIONS - Battery Powered Systems - Cordless Telephones - Radio Control Systems - Portable/Palm Top/Notebook puters - Portable Consumer Equipment - Portable Instrumentation - Automotive Electronics - SMPS Post-Regulator - Voltage Reference - Avionics AS2954 Version Over LP2954 - Error Flag Warns Of Output Dropout - Logic-Controlled Electronic Shutdown - Output Programmable From 1.24V to 29V - Input Can Withstand -20V Reverse Battery & +60 Positive Transient PRODUCT DESCRIPTION The AS2954 is a low power voltage regulator. This device is an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable puters. The AS2954 features very low quiescent current (75µA Typ.) and very low dropout voltage. This includes a tight initial tolerance of ± 0.5% max and ± 1% max., and very low output temperature coefficient, making the AS2954 useful as a low-power voltage reference. The key AS2954 features include protection against reversed battery, fold-back current limiting, and automotive load dump protection (60V positive transient). The error flag output feature is used as power-on reset for warning of a low output voltage, due to falling voltage input of batteries. Another feature is the logic patible shutdown input which enables the regulator to be switched on and off. The AS2954 is offered in a 3-pin TO-92and TO-263 package patible with other 5 volt regulators, in 8-Pin plastic, SO-8, (same pin out as AS2951), TO220 and TO-263. The regulator output voltage (of the 8-pin) may be pin-strapped for a 5Vand 3.3V or programmed from 1.24V to 29V with an external pair of resistors. Look for AS2951 for 150m A and LP2951 for 100m A applications. PIN...