LP2957A Datasheet | Texas Instruments

LP2957, LP2957A .ti. SNVS102C - JUNE 1998 - REVISED APRIL 2013 LP2957/LP2957A 5V Low-Dropout Regulator for µP Applications Check for Samples: LP2957, LP2957A Features - 2 5V Output within 1.4% Over Temperature (A Grade) - Easily Programmed for Snap-On/Snap-Off Output - Ensured 250 m A Output Current - Extremely Low Quiescent Current - Low Input-Output Voltage Required for Regulation - Reverse Battery Protection - Extremely Tight Line and Load Regulation - Very Low Temperature Coefficient - Current and Thermal Limiting - Error Flag Signals when Output is out of Regulation APPLICATIONS - High-Efficiency Linear Regulator - Battery-Powered Regulator 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 ensured at room temperature and over the full operating temperature range. The LP2957 is available in the five-lead TO-220 and DDPAK/TO-263...