LP3871

0.8A 快速超低压降线性稳压器

The and LP3874 series of fast ultra-low-dropout linear regulators operate from a 2.5-V to 7-V input supply. Wide range of preset output voltage options are available. These ultra-low-dropout linear regulators respond very quickly to step changes in load, which makes them suitable for low voltage microprocessor applications. The devices are developed on a CMOS process which allows low quiescent current operation independent of output load current. This CMOS process also allows the LP3871 and LP3874 to operate under extremely low dropout conditions.

**Dropout Voltage:** Ultra-low-dropout voltage; typically 24 mV at 80-mA load current and 240 mV at 0.8-A load current.

**Ground Pin Current:** Typically 6 mA at 0.8-A load current.

**Shutdown Mode:** Typically 10-nA quiescent current when the SD pin is pulled low.

**ERROR Flag: **ERROR flag goes low when the output voltage drops 10% below nominal value.

**SENSE:** SENSE pin improves regulation at remote loads.

**Precision Output Voltage:** Multiple output voltage options are available ranging from 1.8 V to 5 V with a ensured accuracy of ±1.5% at room temperature, and ±3% over all conditions varying line, load, and temperature.

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Input Voltage: 2.5 V to 7 V

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Ultra-Low-Dropout Voltage

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Low Ground Pin Current

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Load Regulation of 0.04%

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10-nA Quiescent Current in Shutdown Mode

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Specified Output Current of 0.8-A DC

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Output Voltage Accuracy ±1.5%

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ERROR Flag Indicates Output Status

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SENSE Option Improves Load Regulation

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Minimum Output Capacitor Requirements

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Overtemperature/Overcurrent Protection

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−40°C to +125°C Junction Temperature Range