LP3871数据手册集成电路（IC）的线性+开关稳压器规格书PDF

描述 Description

The LP3871 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).

特性 Features

• Input Voltage: 2.5 V to 7 V
• Ultra-Low-Dropout Voltage
• Low Ground Pin Current
• Load Regulation of 0.04%
• 10-nA Quiescent Current in Shutdown Mode
• Specified Output Current of 0.8-A DC
• Output Voltage Accuracy ±1.5%
• ERROR Flag Indicates Output Status
• SENSE Option Improves Load Regulation
• Minimum Output Capacitor Requirements
• Overtemperature/Overcurrent Protection
• −40°C to +125°C Junction Temperature Range