ZHT431

Document number: DS32157 Rev. 12 - 2

1 of 9

www.diodes.com

April 2018

© Diodes Incorporated

ZHT431

ADJUSTABLE PRECISION ZENER SHUNT REGULATOR

Description

The ZHT431 is a three terminal adjustable shunt regulator offering

excellent temperature stability and output current handling capability

up to 100mA. The device offers extended operating temperature

range working from -55 to +125°C.

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.

Features



Surface Mount SOT23 (Type DN) Package



0.5%, 1% and 2% Tolerance



Maximum Temperature Coefficient 67ppm/°C



Temperature

Compensated

for

Operation

Over

the

Full

Temperature Range



Programmable Output Voltage



50

μA to 100mA Current Sink Capability



Low Output Noise



Wide Temperature Range -55 to +125°C



Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)



Halogen and Antimony Free. “Green” Device (Note 3)

Pin Assignments

Applications



Series and Shunt Regulator



Voltage Monitor



Over Voltage / Under Voltage Protection



Switch Mode Power Supplies

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.

2. See https://www.diodes.com/quality/lead-

free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and

Lead-free.

3. Halogen, Antimony and Beryllium-

free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br +

Cl), <1000ppm antimony compounds and <1000ppm Beryllium.

Typical Application Circuit

GND

(Top View)

SOT23

(Top View)

SOT23 (Type DN)

GND