ZTL431/ZTL432

ZTL431/ZTL432

Document number: DS33263 Rev. 15 - 2

1 of 9

www.diodes.com

November 2010

© Diodes Incorporated

A Product Line of

Diodes Incorporated

COST EFFECTIVE ADJUSTABLE PRECISION SHUNT REGULATOR

Description

The ZTL431 and ZTL432 are three terminal adjustable

shunt regulators offering excellent temperature stability and

output current handling capability up to 100mA. The output

voltage may be set to any chosen voltage between 2.5 and

20 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 ZTL432 has the same electrical specifications as the

ZTL431 but has a different pin out in SOT23 (F-suffix) and

SOT23F (FF-suffix).

Both variants are available in 2 grades with initial

tolerances of 1% and 0.5% for the A and B grades

respectively.

These are functionally equivalent to the TL431/ TL432

except for maximum operation voltage, and have an

ambient temperature range of -40 to 125°C as standard.

Pin Assignments

ZTL431_F SOT23, ZTL431_FF SOT23F

(Top View)

ZTL432_F SOT23, ZTL432_FF SOT23F

(Top View)

ZTL431_H6, SC70-6

(Top View)

†Connected internally to substrate;

should be left floating or connected to Anode

ZTL431ASE5 SOT235

(Top View)

ZTL431_E5 SOT235

(Top View)

connected to pin 5

Features

•

Temperature range ................ -40 to 125°C

•

Reference voltage tolerance at 25°C

o

0.5%.......................................B grade

o

1% .........................................A grade

•

0.2

Ω typical output impedance

•

Sink current capability…….. 1mA to 100mA

•

Applications

•

Opto-coupler linearization

•

Linear regulators

•

Improved zener

•

Variable reference

Anode

Cathode

Ref

2

1

3

Anode

Cathode

Ref

2

1

3

Anode

Cathode

Ref

2

1

3

Cathode

Ref

N/C

†

N/C

†

NC

Anode

3

2

1

4

5

6

Cathode

2

Anode

Cathode

N/C

3

1

5

4

Ref

N/C

2

Anode

Cathode

N/C

3

1

5

N/C*