Rev F: Nov 2-06

SPX43A,B,C Precision Adjustable Shunt Regulator

© 2006 Sipex Corporation

Precision Adjustable Shunt Regulator

The SPX43 is a three-terminal adjustable shunt voltage regulator providing a highly accurate

bandgap reference. The SPX431 acts as an open-loop error amplifier with a 2.5V temperature

compensation reference. The SPX431 has thermal stability, wide operating current of 150mA

and broad temperature range of 0°C to 150°C, making it suitable for a variety of applications

which require a low-cost, high performance solution. SPX431A tolerance of 0.5% is proven

to be sufficient to overcome all 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

two external resistors. The SPX431 is available in SOIC-8, SOT-23-3, SOT-23-5, SOT89,

and TO-92 packages.

SPX431A,B,C

FEATURES

• Trimmed Bandgap: 0.5%, 1% and 2%

• Wide Operating Current: 1mA to 150mA

• Extended Temperature Range:

0°C to 105°C

• Low Temperature Coefficient: 30 ppm/°C

• Improved Replacement in Performance

for TL43

• Low Cost Solution

• Available in Lead Free, RoHS compliant

packaging: SOIC, SOT-89, SOT-23-3,

SOT-23-5, and TO-92

APPLICATIONS

• Battery Operated Equipment

• Adjustable Supplies

• Switching Power Supplies

• Error Amplifiers

• Single Supply Amplifier

• Monitors/VCRs/TVs

• Personal Computers

DESCRIPTION

Anode (A)

Cathode (K)

2.5V

Reference

(R)

+

-

TyPICAL APPLICATIONS CIRCUIT