ZHT431 Datasheet, PDF (1/7 Pages) Zetex Semiconductors – ADJUSTABLE PRECISION ZENER SHUNT REGULATOR

ADJUSTABLE PRECISION
ZENER SHUNT REGULATOR
ISSUE 2 – FEBRUARY 1997
DEVICE 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.
SCHEMATIC DIAGRAM
V ref
ZHT431
FEATURES
• ^{Surface mount SO8, SOT89, SOT223}
and SOT23 packages
• ^{TO92 package}
• ^{2% and 1% tolerance}
• ^{Maximum temperature coefficient 67}
ppm/°C
• ^{Temperature compensated for}
operation over the full temperature
range
• ^{Programmable output voltage}
• ^{50µA to 100mA current sink capability}
• ^{Low output noise}
• ^{Wide temperature range -55 to +125°C}
APPLICATIONS
• ^{Series and Shunt regulator}
• ^{Voltage monitor}
• ^{Over voltage/ under voltage protection}
• ^{Switch mode power supplies}
V_Z
G
nd
4-28