用于微功耗应用的 5V 低压降稳压器
The is a 5V micropower voltage regulator with electronic shutdown, error flag, very low quiescent current 150 µA typical at 1 mA load, and very low dropout voltage 470 mV typical at 250 mA 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 mA 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.
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- 5V Output within 1.4% Over Temperature A Grade
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- Easily Programmed for Snap-On/Snap-Off Output
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- Ensured 250 mA Output Current
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- Extremely Low Quiescent Current
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- Low Input-Output Voltage Required for Regulation
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- Reverse Battery Protection
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- Extremely Tight Line and Load Regulation
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- Very Low Temperature Coefficient
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- Current and Thermal Limiting
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- Error Flag Signals when Output is out of Regulation
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