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ZR431L

ADJUSTABLE PRECISION SHUNT REGULATOR

Zetex => Diodes 

ADJUSTABLE PRECISION SHUNT REGULATOR

ZR431L

SUMMARY

DESCRIPTION

The ZR431L is a three terminal adjustable shunt regulator offering excellent

temperature stability and output current handling capability up to 25mA. The

output voltage may be set to any chosen voltage between 1.24 and 10 volts

by selection of two external divider resistors.

The devices can be used as a replacement for zener diodes in many

applications requiring an improvement in zener performance.

The ZR431L is particularly used in the feedback control loop of switch mode

power supplies. In this application the device 1.24 volt reference enables the

generation of low voltage supplies, typically 3.3. volts or 3 volts.

FEATURES

• 2.5% and 1% tolerance

• Max. temperature coefficient 50 ppm/°C

• Temperature compensated for operation over the full temperature range

• 100␮A to 25mA current sink capability

• Surface mount SOT23 package

• TO92 package

APPLICATIONS

• Switch mode power supplies

• Shunt regulator

• Series regulator

• Voltage monitor

• Over voltage / under voltage protection

ORDERING INFORMATION

DEVICE

PACK

TOL %

ZR431LF01TA

SOT23

1

ZR431LF02TA

SOT23

2.5

ZR431LC01STOB

TO92

1

ZR431LC02STOB

TO92

2.5

ZR431LC01L

TO92

1

ZR431LC02L

TO92

2.5

REEL

SIZE

7”

7”

LOOSE

LOOSE

QUANTITY

PER REEL

3000

3000

1500

1500

PART MARK

43M

43L

ZR431L01

ZR431L02

ZR431L01

ZR431L02

SOT23

TO92

SOT23

Top View

TO92

Underside

View

ISSUE 2 - AUGUST 2003

1

SEMICONDUCTORS

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