LP3875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 LP387x 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 LP3872 and LP3875 are developed on a CMOS process which allows low quiescent current operation independent of output load current. This CMOS process also allows the LP3872 and LP3875 to operate under extremely low dropout conditions.Dropout Voltage: Ultra low-dropout voltage; typically 38 mV at 150-mA load current and 380 mV at 1.5-A load current.Ground Pin Current: Typically 6 mA at 1.5-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 (LP3872 only).SENSE: Sense pin improves regulation at remote loads (LP3875 only).Precision Output Voltage: Multiple output voltage options are available ranging from 1.8 V to 5 V with a specified accuracy of ±1.5% at room temperature, and ±3.0% over all conditions (varying line, load, and temperature).

特性 Features

• Input Voltage Range: 2.5 V to 7 V
• Ultra Low-Dropout Voltage
• Low Ground Pin Current
• Load Regulation of 0.06%
• 10-nA Quiescent Current in Shutdown Mode
• Ensured Output Current of 1.5-A DC
• Available in DDPAK/TO-263, TO-220, and SOT-223 Packages
• Output Voltage Accuracy ±1.5%
• ERROR Flag for Output Status
• Sense Option Improves Load Regulation
• Minimum Output Capacitor Requirements
• Overtemperature/Overcurrent Protection
• −40°C to 125°C Junction Temperature Range