REJ03D0678-0300 Rev.3.00 Apr 03, 2007

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HA17431 Series

Shunt Regulator

REJ03D0678-0300

Rev.3.00

Apr 03, 2007

Description

The HA17431 series is temperature-compensated variable shunt regulators. The main application of these products is in

voltage regulators that provide a variable output voltage. The on-chip high-precision reference voltage source can

the MPAK-5V package, is designed for use in switching mode power supplies. It provides a built-in photocoupler

bypass resistor for the PS pin, and an error amplifier can be easily constructed on the supply side.

Features

• The V versions provide 2.500 V ±1% at Ta = 25°C

• The HA17431VLP includes a photocoupler bypass resistor (2 kΩ)

• The reference voltage has a low temperature coefficient

• The MPAK-5V(5-pin), MPAKV(3-pin) and UPAKV miniature packages are optimal for use on high mounting

density circuit boards

Block Diagram

A

+

−

REF

K

PS*

2k

Ω

Note: * The PS pin is only provided by the HA17431VLP.

Application Circuit Example

Vout

+

–

A

K

REF

2k

Ω

PS

HA17431VLP

GND

Switching power supply secondary-side error amplification circuit

R