3A降压转换调节器--AT2596

一 概述

The AT2596 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator capable of driving a 3A load with excellent line and load regulation.
Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation,and a fixed-frequency oscillator. A standard series of inductors are available from several different manufacturers optimized for use with the AT2596 series. This feature greatly simplifies the design of switch-mode power supplies. The output voltage is guaranteed to ±3% tolerance under specified input voltage and output load conditions. The oscillator frequency is guaranteed to ±15%. External shutdown is included, featuring typically 100µA standby current. Self protection features include a two stage frequency current limit for the output switch and an temperature shutdown for complete under fault conditions.

二 特性

Standard PSOP-8/TO-220-5L /TO-263-5L

Adjustable Output VersionsAdjustable Version Output Voltage Range 1.23V to 37V
VOUT Accuracy is to ±3% Under Specified Input
Voltage the Output Load Conditions
Input Voltage Range Up to 40V
Requires Only 4 External Components with High Efficiency
TTL Shutdown Capability, Low Power Standby Mode
Built-in Thermal Shutdown, Current Limit Protection
Uses Standard Inductors
150 KHz Fixed Frequency Internal Oscillator

三 应用

Pre-Regulator for Linear Regulators
reducing High-Efficiency Step-Down Buck Regulator
over On-Card/ Board Switching Regulators
protection Positive to Negative Converter(Buck)

四 封装

五 应用电路图