LP2957

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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