Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
General Description
The AZ431-B is a three-terminal adjustable shunt regu-
lator with guaranteed thermal stability over a full oper-
ation range. It features sharp turn-on characteristics,
low temperature coefficient and low output impedance,
which make it ideal substitute for Zener diode in appli-
cations such as switching power supply, charger and
other adjustable regulators.
The output voltage of AZ431-B can be set to any value
between V
REF
(2.5V) and the corresponding maximum
cathode voltage.
The AZ431-B precision reference is offered in two
voltage tolerance: 0.4% and 0.8%.
This IC is available in 5 packages: TO-92 (bulk or
ammo packing), SOT-23, SOT-23-5, SOT-89-3 and
SOIC-8.
AZ431-B
Features
·
·
·
·
·
·
·
Programmable Precise Output Voltage from 2.5V
to 18V
High Stability under Capacitive Load
Low Temperature Deviation: 4.5mV Typical
Low Equivalent Full-range Temperature Coeffi-
cient with 20PPM/
o
C Typical
Sink Current Capacity from 1mA to 100mA
Low Output Noise
Wide Operating Range of -40 to 125
o
C
Applications
·
·
·
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Charger
Voltage Adapter
Switching Power Supply
Graphic Card
Precision Voltage Reference
SOIC-8
SOT-89-3
TO-92
SOT-23
SOT-23-5
TO-92 Ammo Packing
Figure 1. Package Types of AZ431-B
Mar. 2007 Rev. 2. 4
1
BCD Semiconductor Manufacturing Limited
BCDSEMI [ BCD SEMICONDUCTOR MANUFACTURING LIMITED ]
