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AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
Features
AP431/AP431A Rev. 5
1 of 14
MARCH 2007
www.diodes.com
Diodes Incorporated
Lead-free
Lead-free
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/
o
C
Fast turn-on response
Low dynamic output impedance: 0.2
Programmable output voltage to 36V
Low output noise
Packages: SOT23, SOT23R, SOT25, SC59 (W package
code), SC59 (R package code), SOP-8L and TO92-3L
SOT23, SOT23R, SOP-8L and SC59: Available in
“Green” Molding Compound (No Br, Sb) (Note 1)
Lead Free Finish/RoHS Compliant for Lead Free and
“Green” Products (Note 2)
Ordering Information
A P 4 3 1 X X X X
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
) up to
36V merely by selecting two external resistors that act as a
voltage divider network. These devices have a typical output
impedance of 0.2
. 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.
Package
Blank: SOP-8L
V : TO92-3L
Packing
-B Bulk
SA
W
R
Q
SR
: SOT23
: SC59
: SC59
: SOT25
: SOT23R
Lead-Free
Tolerance:
Blank : +/- 1%
Reference Voltage
A : +/- 0.5%
L : Lead Free
G : Green
(Note 1)
-7/-13 : Taping
-A : Ammo Box
(Note 3)
Note:
2. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see
EU Directive Annex Notes 5 and 7.
1. SOT23, SOT23R are “Green” products only.
7” Tape and Reel
13” Tape and Reel
QuantityPart Number
Ammo Box
Device
(Note 4)
Package
Code
Packaging
(Note 5) QuantityPart Number
Suffix
Suffix
Quantity Part Number
Suffix
AP431(A)SA
SA
SOT23
3000/Tape
& Reel
3000/Tape
& Reel
3000/Tape
& Reel
3000/Tape
& Reel
3000/Tape
& Reel
-7
NA
NA
NA
NA
AP431(A)SR
SR
SOT23R
-7
NA
NA
NA
NA
AP431(A)Q
Q
SOT25
-7
NA
NA
NA
NA
AP431(A)W
W
SC59
-7
NA
NA
NA
NA
AP431(A)R
R
SC59
-7
NA
NA
NA
NA
AP431(A)
SOP-8L
NA
NA
2500/Tape
& Reel
NA
-13
NA
NA
AP431(A)V
V
TO92-3L
NA
NA
NA
2000/Box
-A
Notes: 3. Ammo Box is for TO92-3 Spread Lead.
4. Suffix “A” denotes AP431A device.
5. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf
.
General Description