LP2957A
LP2957A is 5V Low-Dropout Regulator manufactured by National Semiconductor.
- Part of the LP2957 comparator family.
- Part of the LP2957 comparator family.
Description
The LP2957 is a 5V micropower voltage regulator with electronic shutdown, error flag, very low quiescent current (150 µA typical at 1 m A load), and very low dropout voltage (470 m V typical at 250 m A 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 m A 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 (0.04% typical) and low output temperature coefficient (20 ppm/˚C typical).
The accuracy of the 5V output is guaranteed at room temperature and over the full operating temperature range.
The LP2957 is available in the five-lead TO-220 and TO-263 packages.
Features n 5V output within 1.4% over...
