AZ431 Datasheet, PDF (1/20 Pages) BCD Semiconductor Manufacturing Limited – ADJUSTABLE PRECISION SHUNT REGULATORS

Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
General Description
Features
AZ431
The AZ431 series ICs are three-terminal adjustable
shunt regulators with guaranteed thermal stability over
a full operation range. These ICs feature sharp turn-on
characteristics, low temperature coefficient and low
output impedance, which make them ideal substitutes
for Zener diodes in applications such as switching
power supply, charger and other adjustable regulators.
The AZ431 series ICs contain two voltage types,
AZ431-A for 40V and AZ431-B for 20V. The output
voltage of both types can be set to any value between
V_REF(2.5V) and the corresponding maximum cathode
voltage.
The AZ431 precision reference is offered in two band-
gap tolerance: 0.4% and 0.8%.
These ICs are available in 5 Packages: TO-92, SOT-23-
3, SOT-23-5, SOT-89 and SOIC-8.
· Programmable Precise Output Voltage from 2.5V
to 36V or 18V
· Very Accurate Reference Voltage: 0.15% Typical
· High Stability under Capacitive Load
· Low Temperature Deviation: 4.5mV Typical
· Low Equivalent Full-range Temperature Coeffi-
cient with 20PPM/^oC Typical
· Low Dynamic Output Resistance: 0.2Ω Typical
· Sink Current Capacity from 1mA to 100 mA
· Low Output Noise
· Wide Operating Range of -40 to 125^oC
Applications
· Charger
· Voltage Adapter
· Switching Power Supply
· Graphic Card
· Precision Voltage Reference
SOIC-8
SOT-89
TO-92
Apr. 2005 Rev. 1. 7
SOT-23-3
SOT-23-5
Figure 1. Package Types of AZ431
BCD Semiconductor Manufacturing Limited
1