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PDF AZ431-B Data sheet ( Hoja de datos )
| Número de pieza | AZ431-B | |
| Descripción | ADJUSTABLE PRECISION SHUNT REGULATORS | |
| Fabricantes | BCD Semiconductor | |
| Logotipo |  |
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
General Description
Features
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 5 packages: TO-92 (bulk or
ammo packing), SOT-23, SOT-23-5, SOT-89-3 and
SOIC-8.
· 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
www.DataSheet4U.com
SOIC-8
SOT-89-3
TO-92
SOT-23
SOT-23-5
TO-92 Ammo Packing
Mar. 2007 Rev. 2. 4
Figure 1. Package Types of AZ431-B
BCD Semiconductor Manufacturing Limited
1
1 page  
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
∆VREF
∆VREF
∆VKA
IREF
∆IREF
IKA
(Min)
VKA=VREF
IKA= 10mA
0 to 70oC
-40 to 85oC
-40 to 125oC
IKA=10mA
∆VKA=
10V to VREF
∆VKA=
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
4
ZKA
VKA=VREF, IKA=1 to 100mA
f ≤ 1.0KHz
Min
2.490
2.480
Typ
2.500
2.500
4.5
4.5
4.5
-1.0
-0.5
0.7
0.4
0.4
0.05
0.2
AZ431-B
Max Unit
2.510
2.520
8
10
16
V
mV
-2.7
mV/
V
-2.0
4 µA
1.2 µA
1.0 mA
1.0 µA
0.5 Ω
Mar. 2007 Rev. 2. 4
BCD Semiconductor Manufacturing Limited
5
5 Page 
Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
Typical Application
AZ431-B
R3
VIN
R1
VREF
R2
VOUT
VOUT=(1+R1/R2)*VREF
AZ431-B
Figure 19. Shunt Regulator
VIN
R1
R2
VREF
R3
R4
AZ431-B
VOUT
VOUT=(1+R2/R3)*VREF
Figure 20. High Current Shunt Regulator
VIN
R1
R2
IOUT
IOUT=VREF/R2 + IKA
Mar. 2007 Rev. 2. 4
AZ431-B
Figure 21. Current Source or Current Limit
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet AZ431-B.PDF ] | |
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