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
provide ±1% accuracy in the V versions, which have a VKA 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
GND
HA17431VLP
REJ03D0678-0300 Rev.3.00 Apr 03, 2007
Page 1 of 19
HA17431 Series
Pin Arrangement
MPAK-5V
NC
5
PS
4
MPAKV
(HA17431VLTP)
A
3
1 2 3
REF A K
1
REF
2
K
FP-8DGV
REF NC
8
7
A
6
MPAKV
(HA17432VLTP)
A
3
1
K
UPAKV
(HA17431UA/VUP)
A
2
REF
1
REF
TO-92V
NC
5
2
A
UPAKV
(HA17432UA/VUP)
A
3
K
1
K
2
A
3
REF
TO-92MODV
Mark side
Mark side
1
1
K
2
3
4
NC NC NC
REJ03D0678-0300 Rev.3.00 Apr 03, 2007
Page 3 of 19
2
3
REF A
K
1
2
3
REF A
K
