AP431/AP431A
Adjustable Precision Shunt Regulator
Features
Description
• Precision reference voltage
AP431 : 2.495V ± 1%
The AP431/AP431A are 3-terminal adjustable
precision shunt regulators with guaranteed
temperature stability over the applicable extended
commercial temperature range. The output voltage
AP431A : 2.495V ± 0.5%
• Sink current capability: 200mA
• Minimum cathode current for regulation: 300μA
• Equivalent full-range temp coefficient: 30 ppm/oC
• Fast turn-on response
may be set at any level greater than 2.495V(VREF
)
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.
• Low dynamic output impedance: 0.2Ω
• Programmable output voltage to 36v
• Low output noise.
• Packages: TO92, SOT89, SOT23, SOT25 and
SOP
The precise (+/-) 1% Reference voltage tolerance of
the AP431/431A 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.
Ordering Information
A P 4 3 1 X X X X X
Operating Temp. Range
Blank : -20oC~85oC
Reference Voltage
Package
Lead Free
Packing
Blank : Normal
Tolerance:
Blank : SOP-8L
Blank : Tube or bulk
I
: -40oC~85oC
Blank : +/- 1%
Y
: SOT89-3L
: TO92-3L
: SOT23-3L
: SOT23-3L
: SOT25
L : Lead Free Package
A
: Taping
A
: +/- 0.5%
V
W
R
Q
Typical Application Circuit
VIN
VOUT
+
+
R1
R2
Cin
Cout
AP431
VOUT = (1+R1/R2)VREF
Precision Regulator
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev.1.0 May.7, 2004
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