LP2957 Datasheet | Texas Instruments

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 packages. Package Outline Top View Top View Figure 1. Bent, Staggered Leads 5-Lead TO-220 Package See Package Number NDH0005D Figure 2. Plastic Surface Mount Package 5-Lead DDPAK/TO-263 Package See Package Number KTT0005B Side View Figure 3. See Package Number KTT0005B These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of...