HA17431_15 Datasheet, PDF (1/21 Pages) Renesas Technology Corp – Shunt Regulator

Data Sheet
HA17431 Series
Shunt Regulator
R03DS0086EJ0400
Rev.4.00
Jan 10, 2014
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
provide ±1% accuracy in the V versions, which have a V_KA max of 16 volts. The HA17431VLP, which is provided in
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
K
PS*
2kΩ
REF
+
−
A
Note: * The PS pin is only provided by the HA17431VLP.
Application Circuit Example
Switching power supply secondary-side error amplification circuit
Vout
R
+
R₁
–
K PS
2kΩ
REF
A
R₂
HA17431VLP
GND
R03DS0086EJ0400 Rev.4.00
Jan 10, 2014
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