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AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
AP431/AP431A
Document number: DS31002 Rev. 18 - 2
1 of 18
www.diodes.com
February 2012
© Diodes Incorporated
Description
The AP431 and 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
AP431/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.
Features
• Precision reference voltage
• AP431: 2.495V ± 1%
• AP431A: 2.495V ± 0.5%
• Sink current capability: 200mA
• Minimum cathode current for regulation: 300μA
• 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
• Lead Free packages: SOT25, SC59, SC59R,
SOT89-3L and TO92-3L
• SOT23, SOT23R, SOT25, SC59, SC59R, SO-8,
SOT89-3L, TO92-3L: Available in “Green” Molding
Compound (No Br, Sb)
• Lead Free Finish/ RoHS Compliant (Note 1)
Pin Assignments
(1) SOT25 (2) SO-8
4REF
5 ANODE
NC
1
CATHODE
3
NC
2
(Top View)
NC
5
4
18
6
7
3
2
ANODE
ANODE
CATHODE
NC
ANODE
REF
ANODE
(Top View)
(3) SC59 (4) SC59R
(Top View)
A
NODE 1
3 REF
2 CATHODE
ANODE 1
2REF
3 CATHODE
(Top View)
(5) SOT23 (6) SOT23R
(Top View)
ANODE 1
2 CATHODE
3REF
(Top View)
ANODE
1
2
CATHODE3
REF
(7) SOT89-3L (8) TO92-3L
1
2
3
Anode Cathode
REF
(Top View)
(Top View)
1 REF
2 Anode
+
+
+
3 Cathode
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
Verzeichnis
- ・ Konfiguration des Pinbelegungsdiagramms on Seite 1
- ・ Abmessungen des Paketumrisses on Seite 12 Seite 13 Seite 14 Seite 15
- ・ Paket-Footprint-Pad-Layout on Seite 9 Seite 16 Seite 17
- ・ Teilenummerierungssystem on Seite 9
- ・ Markierungsinformationen on Seite 10 Seite 11
- ・ Blockdiagramm on Seite 2
- ・ Typisches Anwendungsschaltbild on Seite 2 Seite 8
- ・ Technische Daten on Seite 3
- ・ Elektrische Spezifikation on Seite 3 Seite 4 Seite 5 Seite 6 Seite 7
