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Issue 7- July 2009 1 www.diodes.com
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Diodes Incorporated
ZHT431
Adjustable Precision Zener Shunt Regulator
Description
Ordering Information
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 SOT223 and SOT23 packages
• 0.5%, 1% and 2% tolerance
• Maximum temperature coefficient 67 ppm/°C
• Temperature compensated for operation over
the full temperature range
• Programmable output voltage
• 50mA to 100mA current sink capability
• Low output noise
• Available in “Green” Molding Compound
(No Br, Sb) denoted by -7
• Wide temperature range -55 to +125°C
Applications
• Series and shunt regulator
• Voltage monitor
• Over voltage / under voltage protection
• Switch mode power supplies
Pinout Information
Order Reference Tolerance
(%)
Package Part mark Status Reel size
(inches)
Quantity
per reel
Tape
width
ZHT431C01L 1 TO92 ZHT43101 Obsolete Loose 4000 -
ZHT431C01STOB 1 TO92 ZHT43101 Obsolete 12.5 1500 -
ZHT431C01STZ 1 TO92 ZHT43101 Obsolete Concertina 1500 -
ZHT431C02L 2 TO92 ZHT43102 Obsolete Loose 4000 -
ZHT431C02STOB 2 TO92 ZHT43102 Obsolete 12.5 1500 -
ZHT431C02STZ 2 TO92 ZHT43102 Obsolete Concertina 1500 -
ZHT431F01TA 1 SOT23 43C Active 7 3000 8mm
ZHT431F01-7 1 SOT23 43C Active 7 3000 8mm
ZHT431FMTA 0.5 SOT23 43P Active 7 3000 8mm
ZHT431F02TA 2 SOT23 43D Active 7 3000 8mm
ZHT431G01TA 1 SOT223 ZHT43101 Active 7 1000 12mm
ZHT431G02TA 2 SOT223 ZHT43102 Active 7 1000 12mm
V
Z
GND
SOT223
Pinout - Top view
V
REF
GND
GND
V
REF
V
Z
SOT23
Pinout - Top view
