ZR431L
ADJUSTABLE PRECISION SHUNT REGULATOR
Description
Pin Assignments
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.
(Top View)
VREF 1
The devices can be used as a replacement for zener diodes in many
applications requiring an improvement in zener performance.
3 GND
VZ
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.
2
SOT23
Features
2.5% and 1% Tolerance
Max. Temperature Coefficient 50ppm/°C
Applications
Temperature Compensated for Operation over The Full
Temperature Range
Shunt Regulator
Series Regulator
Voltage Monitor
Over Voltage/ Under Voltage Protection
Switch Mode Power Supplies
Programmable Output Voltage
100μA to 100mA Current Sink Capability
Surface Mount SOT23 Package
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain
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