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Date: 5/25/04

SPX431L Precision Adjustable Shunt Regulator

© Copyright 2004 Sipex Corporation5

Precision Adjustable Shunt Regulator

SPX431L

DESCRIPTION

FEATURES

■ Tight Voltage Tolerance 0.5% at 10mA

■ Wide Operating Current 1mA to 100mA

■ Extended Temperature Range:

0°C to 105°C

■ Low Temperature Coefficient 30 ppm/°C

■ Improved Replacement in Performance for

TL431 and AS431

■ Low Cost Solution

®

The SPX431L is a 3-terminal adjustable shunt voltage regulator providing a highly accurate

bandgap reference.The SPX431L acts as an open-loop error amplifier with a 2.5V temperature

compensation reference. The SPX431L’s thermal stability, wide operating current (100mA) and

temperature range (0°C to 105°C) makes it suitable for a variety of applications that require a

low cost, high performance solution. SPX431L tolerance of 0.5% is proven to be sufficient to

overcome all of the other errors in the system to virtually eliminate the need for trimming in the

power supply manufacturer's assembly line and contribute a significant cost savings.

resistors. The SPX431L is available in TO-92, SOIC-8, SOT-89, and SOT-23-3 packages.

■ Error Amplifiers

■ Single Supply Amplifier

■ Monitors / VCRs / TVs

■ Personal Computers

BLOCK DIAGRAM

+

-

2.5V

Reference

(R)

Anode (A)

Cathode (K)

APPLICATIONS

■ Battery Operating Equipment

■ Adjustable Supplies

■ Switching Power Supplies

SPX431L

3 Pin SOT-23

ANODE

REF

CATHODE

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Now Available in Lead Free Packaging