LP2957/LP2957A 5V Low-Dropout
Regulator for µP Applications
June 1998
LP2957/LP2957A 5V Low-Dropout
Regulator for µP Applications
General Description
The LP2957 is a 5V micropower voltage
regulator with electronic shutdown, error flag, very low quiescent current (150 µA typical at 1 mA load), and very low dropout voltage (470 mV typical at 250 mA load current).
Output can be wired for snap-on/snap-off operation to eliminate transition voltage states where µP operation may be unpredictable.
Output crowbar (50 mA typical pull-down current) will bring down the output quickly when the
regulator snaps off or when the shutdown function is activated.
The part has tight line and load regulation (...