AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
General Description
Features
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 (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.
•
Precision reference voltage
AP431 : 2.495V ± 1%
AP431A : 2.495V ± 0.5%
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Sink current capability: 200mA
Minimum cathode current for regulation: 300µA
Equivalent full-range temp coefficient: 30 ppm/oC
Fast turn-on response
Low dynamic output impedance: 0.2Ω
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)
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.
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Ordering Information
X X X
X
A P 4 3 1
Reference Voltage
Package
Blank: SOP-8L
: TO92-3L
Packing
Lead-Free
L : Lead Free
:
-B : Bulk
Tolerance
V
:
Blank : +/- 1%
-7/-13 Taping
(Note 1)
G : Green
SA : SOT23
A
: +/- 0.5%
(Note 3)
-A : Ammo Box
W
R
: SC59
:
:
59
SC
Q
25
SOT
: SOT23R
SR
Note:
1. SOT23, SOT23R are “Green” products only.
2. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
7” Tape and Reel
Part Number
13” Tape and Reel
Part Number
Ammo Box
Device Package Packaging
Part Number
(Note 4)
Code
(Note 5)
Quantity
Quantity
Quantity
Suffix
Suffix
Suffix
3000/Tape
& Reel
SA
SR
Q
SOT23
SOT23R
SOT25
SC59
-7
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
AP431(A)SA
AP431(A)SR
AP431(A)Q
AP431(A)W
AP431(A)R
3000/Tape
& Reel
3000/Tape
& Reel
3000/Tape
& Reel
3000/Tape
& Reel
-7
-7
-7
-7
NA
NA
NA
NA
NA
NA
NA
NA
Lead-free
W
R
SC59
2500/Tape
& Reel
NA
SOP-8L
NA
NA
NA
NA
-13
NA
NA
NA
-A
AP431(A)
AP431(A)V
V
TO92-3L
2000/Box
Lead-free
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.
AP431/AP431A Rev. 5
1 of 14
MARCH 2007
www.diodes.com
© Diodes Incorporated