SG1544中文资料Precision Output Supervisory Circuit Single Supply Monitors - Low Voltage Option数据手册Microchip规格书

描述 Description

This device was designed to provide all the operational features of the SG1543 device with the added advantage of uncommitted inputs to the voltage sensing comparators. This allows monitoring of voltage levels less than 2.5 volts by dividing down the internal reference supply. In all other respects, the SG1544 series is identical to the SG1543 series. These monolithic devices contain all the functions necessary to monitor and control the output of a sophisticated power supply system. Over-voltage sensing with provision to trigger an external SCR “crowbar” shutdown; an under-voltage circuit which can be used to monitor either the output or sample the input line voltage; and a third op-amp/comparator usable for current sensing are all included in this IC, together with an independent, accurate reference generator. The voltage-sensing input comparators are identical and can be used with threshold levels from zero volts to VIN (3V). Each has approximately 25mV of hysteresis which is offset so the switching differential threshold is zero on the non-inverting input for rising levels and zero on the inverting input for falling signals. All other operating characteristics are as described in the SG1543 data sheet and application note.Microchip Ordering Part  Standard Microcircuit Drawing (SMD) SG1544J-DESC Cross Reference 5962-8774002VASG1544J-DESC Cross Reference 5962-8774002VX

特性 Features

Uncommitted Comparator Inputs for Wide Input Flexibility
Common-Mode Range from Zero to Near Supply Voltage
Reference Voltage Trimmed to 1% Accuracy
Over-Voltage, Under-Voltage, and Current Sensing Circuits all included
SCR \"Crowbar\" Drive of 300mA
Programmable Time Delays
Open-Collector Outputs and Remote Activation Capability
Total Standby Current Less Than 10mA

简介

SG1544属于集成电路（IC）的监控器。由制造生产的SG1544监控器PMIC 监控器用于监视和/或控制电路中的电压轨，能够连接微控制器以维持一定的功率限值。监控器类型包括电池备用电路、监控器、多电压监控器、电源监控器、稳压器/监控器、复位计时器、定序器、简单复位/上电复位、智能开/关控制器、系统管理器、电压检测器和看门狗电路。