Rev. 10/30/00

SPX431

Precision Adjustable Shunt Regulator

FEATURES

APPLICATIONS

• Trimmed Bandgap to 0.5%

• Battery Operating Equipments

• Wide Operating Current..........................1mA to 150mA

• Adjustable Supplies

• Extended Temperature Range....................0°°°°C to 105°°°°C

• Switching Power Supplies

• Low Temperature Coefficient ............................30 ppm/°C

• Error Amplifiers

• Offered in TO-92, SOIC, SOT-89, SOT-23-5

• Single Supply Amplifier

• Improved Replacement in Performance for TL431

• Monitors / VCR / TV

• Low Cost Solution

• Personal Computers

PRODUCT DESCRIPTION

The SPX431 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate 0.5% bandgap reference. SPX431 acts as an

open-loop error amplifier with a 2.5V temperature compensation reference. The SPX431 thermal stability, wide operating current

(150mA) and temperature range (0

°C to 105°C) makes it suitable for all variety of application that are looking for a low cost solution

with high performance. SPX431 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 manufactures assembly line and contribute a significant cost

savings.

extended temperature range of 0°C to 105°C. The SPX431 is available in TO-92, SO-8, SOT-89, and SOT-23-5 packages.

PIN CONFIGURATIONS

SOT-23-5 (M5)

3

2

1

Top View

SPX431

54

Top View

SPX431

SOT-89 (M1)

1

2

3

Bottom View

TO-92 (N)

13

2

N/C

REF

ANODE

CATHODE

CATHODE

ANODE

REF

Top View

2

1

3

4

8

7

6

5

SPX431

8-Pin Surface Mount (S)

CATHODE

REF

ANODE

ANODE

ANODE

ANODE

N/C

N/C

N/C CATHODE

ANODE

REF