LP2957A

The LP2957 is a 5V micropower voltage regulator with elec-tronic shutdown,error flag,very low quiescent current(150 µA typical at 1mA load),and very low dropout voltage(470mV typical at 250mA load current).

Output can be wired for snap-on/snap-off operation to elimi-nate transition voltage states where µP operation may beun-predictable.

Output crowbar (50mA typical pull-down current)willbring down the output quickly when the regulator snaps off or when the shutdown function is activated.

The part has tight  line and load regulation(0.04% typical) and low output temperature coefficient (20 ppm/˚C typical).

The accuracy of the 5V output is guaranteed at room tem- perature and over the full operating temperature range.

The LP2957 is available in the five-lead TO-220 and TO-263 packages.