Advanced Power
Electronics Corp.
AP431A
ADJUSTABLE PRECISION SHUNT
REGULATOR
Features
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Description
The AP431A are 3-terminal adjustable precision
shunt regulators with guaranteed temperature
stability over the applicable extended commercial
temperature range. The output voltage may be set at
any level greater than 2.495V(V
REF
) up to 36V merely
by selecting two external resistors that act as a
voltage divider network. These devices have a
typical output impedance of 0.2Ω. Active output
circuitry provides very sharp turn-on characteristics,
making
these
devices
excellent
improved
replacements for Zener diodes in many applications.
The precise (+/-) 1% Reference voltage tolerance of
the AP431A make it possible in many applications to
avoid the use of a variable resistor, consequently
saving cost and eliminating drift and reliability
problems associated with it.
Precision reference voltage
AP431A : 2.495V
±
0.5%
Sink current capability: 200mA
Minimum cathode current for regulation: 300μA
o
Equivalent full-range temp coefficient: 30 ppm/ C
Fast turn-on response
Low dynamic output impedance: 0.2Ω
Programmable output voltage to 36V
Low output noise.
Packages: TO-92,SOT-23, SOT-25 and SOP-8
SOT-89
RoHS Compliant
& Halogen Free Product
Ordering Information
A
P
4
3
1
A
X
-
X
Package
T : TO-92
N/NR : SOT-23
Y : SOT-25
M : SOP-8
G: SOT-89
Reference Voltage
Tolerance :
A : +/- 0.5%
B : +/- 1%
Typical Application Circuit
V
IN
V
OUT
+
C
in
AP431A
AP431
R1
+
C
out
R2
V
OUT
= (1+R1/R2)V
REF
Precision Regulator
www.a-power.com.tw
1
20130401V6.2
A-POWER [ ADVANCED POWER ELECTRONICS CORP. ]
