LT1020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 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

应用 Application

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

简介

LT1020属于集成电路（IC）的线性+开关稳压器。由制造生产的LT1020稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。