LP2957是TI公司的一款单通道LDO产品，LP2957是用于微功耗应用的 5V 低压降稳压器，本页介绍了LP2957的产品说明、应用、特性等，并给出了与LP2957相关的TI元器件型号供参考。
LP2957 - 用于微功耗应用的 5V 低压降稳压器 - 单通道LDO - 线性稳压器(LDO) - TI公司（Texas Instruments，德州仪器）
The LP2957 is a 5V micropower voltage regulator with electronic shutdown, error flag, very low quiescent current (150µA 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 eliminate transition voltage states where µP operation may be unpredictable.
Output crowbar (50mA 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.
- 5V Output within 1.4% Over Temperature (A Grade)
- Easily Programmed for Snap-On/Snap-Off Output
- Ensured 250mA 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
