ZHT2431 Datasheet, PDF (1/6 Pages) Zetex Semiconductors – HIGH TEMPERATURE ADJUSTABLE PRECISION ZENER SHUNT REGULATOR

HIGH TEMPERATURE ADJUSTABLE
PRECISION ZENER SHUNT REGULATOR
ZHT2431
ISSUE 1 JULY 1997
DEVICE DESCRIPTION
FEATURES
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°C to 125°C.
• ^{Surface mount SOT23 package}
• ^{TO92 package}
• ^{2.5% tolerance}
• ^{Average temperature coefficient 50 ppm/°C}
• ^{Temperature compensated for operation}
over the full temperature range
• ^{Programmable output voltage}
• ^{100µA to 25mA current sink capability}
• ^{Low output noise}
• ^{-55° to 125° 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