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What is AZ431-B?

This electronic component, produced by the manufacturer "BCDSEMI", performs the same function as "ADJUSTABLE PRECISION SHUNT REGULATORS".


AZ431-B Datasheet PDF - BCDSEMI

Part Number AZ431-B
Description ADJUSTABLE PRECISION SHUNT REGULATORS
Manufacturers BCDSEMI 
Logo BCDSEMI Logo 


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ADJUSTABLE PRECISION SHUNT REGULATORS
General Description
Features
Data Sheet
AZ431-B
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 VREF (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 4 packages: TO-92 (bulk or
ammo packing), SOT-23, SOT-23-5 and SOT-89.
· 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/oC Typical
· Sink Current Capacity from 1mA to 100mA
· Low Output Noise
· Wide Operating Range of -40 to 125oC
Applications
· Charger
· Voltage Adapter
· Switching Power Supply
· Graphic Card
· Precision Voltage Reference
SOT-89
TO-92(Bulk Packing)
TO-92(Ammo Packing)
Dec. 2012 Rev. 3.3
SOT-23
SOT-23-5
Figure 1. Package Types of AZ431-B
BCD Semiconductor Manufacturing Limited
1

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AZ431-B equivalent
Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
Electrical Characteristics
Operating Conditions: TA=25oC, unless otherwise specified.
Parameter
Reference Voltage
0.4%
0.8%
Test
Circuit
4
Deviation of Reference Voltage
Over Full Temperature Range
4
Ratio of Change in Reference
Voltage to the Change in
Cathode Voltage
Reference Current
Deviation of Reference Current
Over Full Temperature Range
Minimum Cathode Current for
Regulation
5
5
5
4
Symbol
Conditions
VREF VKA=VREF, IKA=10mA
ΔVREF
ΔVREF
ΔVKA
IREF
ΔIREF
IKA
(Min)
VKA=VREF
IKA= 10mA
0 to 70oC
-40 to 85oC
-40 to 125oC
IKA=10mA
ΔVKA=
10V to VREF
ΔVKA=
18V to 10V
IKA=10mA, R1=10KΩ, R2=
IKA=10mA, R1=10KΩ, R2=
TA=-40 to 125oC
VKA=VREF
Off-state Cathode Current
6
IKA
(Off)
VKA=18V, VREF=0
Dynamic Impedance
Thermal Resistance
4
ZKA
VKA=VREF, IKA=1 to 100mA
f 1.0KHz
SOT-23
SOT-23-5
θJC TO-92
SOT-89
AZ431-B
Min
2.490
2.480
Typ
2.500
2.500
4.5
4.5
4.5
Max Unit
2.510
2.520
8
10
16
V
mV
-1.0 -2.7
mV/
V
-0.5 -2.0
0.7 4 μA
0.4 1.2 μA
0.4 1.0 mA
0.05 1.0 μA
0.2
177.65
177.65
107.04
30.30
0.5 Ω
oC/W
Dec. 2012 Rev. 3.3
BCD Semiconductor Manufacturing Limited
5


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AZ431-B datasheet


1. Datasheet - Adjustable Shunt Regulator

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