AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
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%
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
•
•
•
•
•
•
•
•
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.
Packages: TO92-3L, SOT89-3L, SOP-8L, SOT23,
SOT25, SC-59
Ordering Information
X
X
X
A
P
4
3
1
X
Reference Voltage
Package
Packing
: Tube
Lead-Free
Tolerance:
Blank : +/- 1%
Blank : SOP-8L
Blank : Standard
-U
-B
L
G
: Lead-Free
: Green
:
Bulk
Y
V
SA
W
R
: SOT89-3L
: TO92-3L
: SOT23
: SC59
A
: +/- 0.5%
(Note1)
-7/-13 : Taping
-A Ammo Box
:
: SC59
Q
: SOT25
Note:
1. Only for SOT23 and SC59
7” Tape and Reel
Part
13” Tape and Reel
Part
Number Quantity Number
Ammo Box
Device
(Note 2)
Package Packaging
Part
Code
(Note 3)
Quantity
Number
Quantity
Suffix
Suffix
Suffix
AP431(A)SA
AP431(A)Q
AP431(A)W
AP431(A)R
AP431(A)
SA
Q
W
R
SOT23
SOT25
SC59
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
NA
-7
10000/Tape & Reel
10000/Tape & Reel
10000/Tape & Reel
10000/Tape & Reel
2500/Tape & Reel
2500/Tape & Reel
NA
-13
NA
NA
NA
NA
NA
NA
-7
-7
-7
NA
NA
NA
-13
-13
-13
-13
-13
NA
NA
NA
NA
NA
NA
-A
SC59
SOP-8L
SOT89-3L
TO92-3L
AP431(A)Y
AP431(A)V
Y
V
NA
NA
NA
2000/Box
Notes: 2. Suffix “A” denotes AP431A device.
3. 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. 1
1 of 13
AUGUST 2006
www.diodes.com
© Diodes Incorporated