HIGH TEMPERATURE ADJUSTABLE
PRECISION ZENER SHUNT REGULATOR
ISSUE 1 JULY 1997
DEVICE DESCRIPTION
The ZHT2431 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 15 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 ZHT2431 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.
The ZHT2431 is intended for use over the
extended operating range of -55擄C to 125擄C.
ZHT2431
FEATURES
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Surface mount SOT23 package
TO92 package
2.5% tolerance
Average temperature coefficient 50 ppm/擄C
Temperature compensated for operation
over the full temperature range
Programmable output voltage
100碌A(chǔ) to 25mA current sink capability
Low output noise
-55擄 to 125擄 C operation
APPLICATIONS
Shunt regulator
Series regulator
Voltage monitor
Over voltage/ under voltage protection
Switch mode power supplies
SCHEMATIC DIAGRAM
V
Z
V
ref
G
nd
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HIGH TEMPERATURE ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
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HIGH TEMPERATURE ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
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HIGH TEMPERATURE ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
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HIGH TEMPERATURE ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
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HIGH TEMPERATURE ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
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