可调节精密分流调节器--AT431

一 概述

The AT431, A, B is a three-terminal adjust -able regulator series with a guaranteed thermal stability over applicable temperature ranges. The output voltage may be set to any value between vref (approxi- mately 2.5 volts) and 40 volts with two external resistors. These devices have a typical dynamic output impedance of 0.2 ?. Active output circuitr y provides a very sharp turn-on characteristic, making these devices excellent replacement for zener diodes in many applications.
The AT431, A, B is characterized for operation from 0°C to +85°C.

二 特性

Programmable Output Voltage to 40V
Voltage Reference Tolerance 1.0% for B Series
and 0.5% for A Series Low Dynamic Output Impedance 0.22?
Sink Current Capability of 0.1mA to 100mA
Equivalent Full-Range Temperature Coefficient of 50ppm/°C
Temperature Compensated for Operation Over
Full Rated Operating Temperature Range
Low Output Noise Voltage
Fast Turn on Response

Available in SOT-23, SOT-25, SOT-89 or TO-92 Packages.
 

三 应用

Low Output Voltage (3.0V to 3.3V)Switching
Power Supply Error Amplifier
Adjustable Voltage or Current Linear and Switch-ing Power Supplies
Voltage Monitoring
Current Source and Sink Circuits
Analog and Digital Circuits Requiring Precision
References
Low Voltage Zener Diode Replacements

四 封装

五 结构图