NOT RECOMMENDED FOR NEW DESIGN
AP432/AP432A
USE AZ431L
ADJUSTABLE PRECISION SHUNT REGULATOR
Description Pin Assignments
The AP432 and AP432A are 3-terminal adjustable precision shunt
(1) SOT25 (2) SO-8
regulators with guaranteed stable temperature over the applicable
(Top View)
(Top View)
extended commercial temperature range. The output voltage may be
1 8
REF
set at any level greater than 1.24V (V ) up to 20V merely by CATHODE
REF
NC 5 ANODE
1
selecting two external resistors that act as a voltage divider network. 2 7
ANODE ANODE
NC
These devices have a typical output impedance of 0.2. Active output 2
3 ANODE
ANODE 6
circuitry provides very sharp turn-on characteristics, making these
4 5
NC NC
CATHODE 3 4 REF
devices excellent improved replacements for Zener diodes in many
applications.
(3) SC59 (4) SC59R
The precise +/-1% reference voltage tolerance of the
(Top View) (Top View)
AP432/AP432A make it possible in many applications to avoid the
use of a variable resistor, consequently saving cost and eliminating
REF
3 3 CATHODE
drift and reliability problems associated with it.
ANODE 1
ANODE 1
2 CATHODE 2 REF
Features
Precision Reference Voltage
AP432 : 1.24V 1%
(5) SOT23 (6) SOT23R
AP432A : 1.24V 0.5%
(Top View) (Top View)
Sink Current Capability: 200mA
Minimum Cathode Current for Regulation: 150A
3 CATHODE
3 REF
Equivalent Full-Range Temp Coefficient: 30 ppm/C
Fast Turn-On Response
1
ANODE
ANODE 1
Low Dynamic Output Impedance: 0.2
Programmable Output Voltage to 20V 2
REF
2 CATHOD
Low Output Noise
Lead Free packages: SOT25, SC59, SC59R and SOT89-3
(7) SOT89-3
Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
(Top View)
SOT23, SOT23R, SOT25, SC59, SC59R, SO-8 and SOT89:
Available in Green Molding Compound (No Br, Sb)
Halogen and Antimony Free. Green Device (Note 3)
2 3
1
Anode Cathode
REF
Notes: 1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied.
2. See
NOT RECOMMENDED FOR NEW DESIGN
AP432/AP432A
USE AZ431L
Functional Block Diagram
REF (R)
+
-
VREF
Anode (A)
Functional Block Diagram
Cathode (C)
REF (R)
Anode (A)
Absolute Maximum Ratings (@T = +25C, unless otherwise specified.)
A
Symbol Parameter Rating Unit
V Cathode Voltage 20 V
CV
I Continuous Cathode Current -10 to +250 mA
CC
I Reference Input Current 10 mA
REF
T Operating Temperature -20 to +85 C
OP
T Storage Temperature -65 to +150 C
ST
SOT23(R) 400 mW
SOT25 550 mW
Power Dissipation
P SC59(R) 400 mW
D
(Notes 4, 5)
SO-8 600 mW
SOT89-3 800 mW
Notes: 4. T , max = +150C.
J
5. Ratings apply to ambient temperature at +25C.
2 of 15
September 2014
AP432/AP432A
Diodes Incorporated
www.diodes.com
Document number: DS31003 Rev. 19 - 3
Cathode (C)