Diodes AP432_A User Manual
Description, Features, Pin assignments
AP432/AP432A
Document number: DS31003 Rev. 18 - 2
1 of 15
September 2012
© Diodes Incorporated
AP432/AP432A
ADJUSTABLE PRECISION SHUNT REGULATOR
Description
The AP432 and AP432A are 3-terminal adjustable precision shunt
regulators with guaranteed stable temperature over the applicable
extended commercial temperature range. The output voltage may be
set at any level greater than 1.24V (V
REF
) up to 20V merely by
selecting two external resistors that act as a voltage divider network.
These devices have a typical output impedance of 0.2
Ω. 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
AP432/AP432A 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.
Features
•
Precision Reference Voltage
AP432 : 1.24V ± 1%
AP432A : 1.24V ± 0.5%
•
Sink Current Capability: 200mA
•
Minimum Cathode Current for Regulation: 150
μA
•
Equivalent Full-Range Temp Coefficient: 30 ppm/°C
•
Fast Turn-On Response
•
Low Dynamic Output Impedance: 0.2
Ω
•
Programmable Output Voltage to 20V
•
Low Output Noise
•
Lead Free packages: SOT25, SC59, SC59R, SOT89-3 and
TO92
Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
•
SOT23, SOT23R, SOT25, SC59, SC59R, SO-8, SOT89 and
TO92: Available in “Green” Molding Compound (No Br, Sb)
Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
(1) SOT25
(2) SO-8
4
REF
5 ANODE
NC
1
CATHODE 3
NC
2
(Top View)
NC
5
4
1
8
6
7
3
2
ANODE
ANODE
CATHODE
NC
ANODE
REF
ANODE
(Top View)
(3) SC59
(4) SC59R
(Top View)
ANODE
1
3 REF
2 CATHODE
ANODE 1
2 REF
3 CATHODE
(Top View)
(5) SOT23
(6) SOT23R
(Top View)
ANODE
1
2
CATHOD
3
REF
(Top View)
ANODE
1
2
CATHODE
3
REF
(7) SOT89-3
(8) TO92
1 2
3
Anode Cathode
REF
(Top View)
(Top View)
1 REF
2 Anode
+
+
+
3 Cathode
Notes:
1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied.
2. Se information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Typical Applications Circuit
+
+
R 2
R 1
V
O U T
V
IN
V
O U T
= (1 +R 1/R 2)V
R E F
P re cisio n R e g u lato r
C
in
C
o ut
A P 4 3 2