描述 Description

The LT?1020 is a combination micropower positive regulator and free collector comparator on a single monolithic chip. With only 40μA supply current, the LT1020 can supply over 125mA of output current. Input voltage range is from 4.5V to 36V and dropout voltage is 0.6V at 125mA. Dropout voltage decreases with lower load currents. Also included on the chip is a class B output 2.5V reference that can either source or sink current. A dropout detector provides an output current to indicate when the regulator is about to drop out of regulation.The dual output comparator can be used as a comparator for system or battery monitoring. For example, the comparator can be used to warn of low system voltage while the dropout detector shuts down the system to prevent abnormal operation. Frequency compensation of the comparator for amplifier applications can be obtained by adding external output capacitance. Dual output or positive and negative regulators can also be made.The 2.5V reference will source or sink current. This allows it to be used as a supply splitter or auxiliary output.

特性 Features

·Input Voltage Range: 4.5V to 36V
·40μA Supply Current
·125mA Output Current
·2.5V Reference Voltage
·Reference Output Sources 1mA and Sinks 0.5mA
·Dual Output Comparator
·Comparator Sinks 10mA
·Dropout Detector
·0.2V Dropout Voltage
·Thermal Limiting
·Available in SO Package

應(yīng)用 Application

·Battery Systems
·Battery Backup Systems
·Portable Terminals
·Portable Instruments

簡介

LT1020屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由制造生產(chǎn)的LT1020穩(wěn)壓器 - 線性線性穩(wěn)壓器用于提供穩(wěn)定的輸出電壓，無論負載電流、輸入電壓或環(huán)境因素如何變化，這些輸出電壓通常都要保持不變。它們的工作原理要求輸入電壓維持在高于所需的輸出電壓，而且要超出某個最小量，并且在工作時會將輸入端的任何多余電壓轉(zhuǎn)換為熱量。對于大多數(shù)應(yīng)用而言，雖然這種穩(wěn)壓器的效率低于開關(guān)模式的穩(wěn)壓器，但它們通常更適合對噪聲高度敏感的應(yīng)用。