Texas Instruments LM431 Adjustable Shunt Voltage Reference 2.495V to 36V

The Texas Instruments LM431 Adjustable Shunt Voltage Reference is a precision shunt voltage reference with an adjustable output from 2.495V to 36V, set using two external resistors. It has an initial accuracy of 0.5% and a temperature coefficient of ±50ppm/°C.

Overview

The LM431 can be programmed to the desired output voltage by selecting two external resistors arranged as a voltage divider network. Its sharp turn-on characteristics make it suitable for many zener diode applications, offering improved precision and consistency. The device is temperature compensated for stable performance over its full temperature range.

Key Features

• Adjustable output voltage from 2.495V to 36V
• Initial accuracy of 0.5%
• Temperature coefficient of ±50ppm/°C
• Temperature compensated for stable operation
• Fast turn-on response
• Low output noise
• Low dynamic output impedance to help maintain voltage stability under load variations
• Green product, free from antimony and bromine

Package

The LM431 is supplied in a compact SOT-23-3 package with three pins, ideal for space-constrained PCB designs.

Dimensions and Weight

Width 3.3, depth 1.5 and height 4.3, with a weight of 0.088 g.

Applications

Typical applications include power management and safety systems, where accurate voltage monitoring and regulation are critical. It can be used in power supplies, battery chargers and voltage monitors.

Choose the Texas Instruments LM431 Adjustable Shunt Voltage Reference for designs that require an adjustable, temperature compensated voltage reference in a compact three-pin package.