LP2956 Datasheet | National Semiconductor

Description The LP2956 is a micropower voltage regulator with very low quiescent current (170 µA typical at light loads) and very low dropout voltage (typically 60 m V at 1 m A load current and 470 m V at 250 m A load current on the main output). The LP2956 retains all the desirable characteristics of the LP2951, but offers increased output current (main output), an auxiliary LDO adjustable regulated output (75 m A), and additional features . The auxiliary output is always on (regardless of main output status), so it can be used to power memory circuits. Quiescent current increases only slightly at dropout, which prolongs battery life. The error flag goes low if the main output voltage drops out of regulation. An open-collector auxiliary parator is included, whose inverting input is tied to the 1.23V reference. Reverse battery protection is provided. The parts are available in DIP and surface mount packages. Features n n n n n n n n n n n Output voltage adjusts from 1.23V to 29V Guaranteed 250 m A current (main output) Auxiliary LDO (75 m A) adjustable output Auxiliary parator with open-collector output Shutdown pin for main output Extremely low quiescent current Low dropout voltage Extremely tight line and load regulation Very low temperature coefficient Current and thermal limiting Reverse battery protection Applications n High-efficiency linear regulator n Low dropout battery-powered regulator n µP system regulator with switchable high-current VCC Block Diagram DS011339-1 © 1999 National Semiconductor Corporation DS011339 .national. Connection Diagrams 16- Pin DIP DS011339-2 Order Number LP2956IN or LP2956AIN See NS Package Number N16A Order Number LP2956AMJ-QML or 5962-9554701QEA See NS Package Number J16A 16-Pin Surface Mount DS011339-3 Order Number LP2956IM or LP2956AIM See NS Package Number M16A .national. Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales...