KSD-I0A003-000 1
A431x
Programmable Voltage Reference




Description
The A431 series are 3-terminal precision shunt regulators that are programmable over a wide voltage range of
2.495V to 16V with ±0.5%, ±1.0% tolerance. The A431 series have a low dynamic impedance of 0.15Ω. These
features make the A431 series an excellent replacement for zener diodes in numerous applications circuits that
require a precision reference voltage.

Features
• Programmable output voltage from 2.495V to 16V
• Voltage reference tolerance : ±0.5%, ±1.0%
• Cathode current capability of 1mA to 100mA

Ordering Information
Type NO. Marking Package Code
A431x A431□ TO-92
　□ : Grade => A:±1% , B:±0.5%
Outline Dimensions ( Unit : mm )

















4.
40~4.
80
4.40~4.80
0.50 Max.
13.
50~14.
50

3.
40~3.
60
0.
45 Max.

1.27 Typ. 1.27 Typ.
1 2 3

Semiconductor
Symbol
PIN Connections
1. Reference
2. Anode
3. Cathode
Functional block diagram

=2.495VV
REF
Reference(R)
Cathode(K)
+
-
Anode(A)