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PDF AZ431 Data sheet ( Hoja de datos )
| Número de pieza | AZ431 | |
| Descripción | ADJUSTABLE PRECISION SHUNT REGULATORS | |
| Fabricantes | BCD Semiconductor | |
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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
www.DataSheet4U.fcoorm 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
VREF(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 125oC
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
1 page  
ADJUSTABLE PRECISION SHUNT REGULATORS
Absolute Maximum Ratings (Note 1)
Data Sheet
AZ431
Parameter
Cathode Voltage
Cathode Current Range (Continuous)
www.DataSheet4U.cRoemference Input Current Range
Power Dissipation
Junction Temperature
Storage Temperature Range
Package Thermal Impedance
Symbol
VKA
IKA
IREF
PD
TJ
TSTG
θJA
Value
AZ431 (40V): 40
AZ431 (20V): 20
-100 to +150
10
M,Z,R Package: 770
N,K Package: 370
160
-65 to +150
M Package: 150
N Package: 330
Z Package: 150
R Package: 50
K Package: 250
Unit
V
mA
mA
mW
oC
oC
oC/W
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the
device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond
those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum
Ratings" for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter
Cathode Voltage
Cathode Current
Operating Ambient
Temperature Range
Symbol
VKA
IKA
Min
VREF
1.0
-40
Max
AZ431(40V): 36
AZ431(20V): 18
100
125
Unit
V
mA
oC
Apr. 2005 Rev. 1. 7
BCD Semiconductor Manufacturing Limited
5
5 Page 
ADJUSTABLE PRECISION SHUNT REGULATORS
Typical Performance Characteristics (Continued)
Data Sheet
AZ431
10
www.DataSheet4U.com
1
I =10mA
KA
T =25oC
A
1K
50
0.1
1K
10K
100K
1000K
Frequency (Hz)
Figure 14. Reference Impedance vs. Frequency
Output
IKA
GND
100
90
80
70
60
50
40
30
20
10
0
0.01uF
A: V =5V
KA
B: V =10V
KA
V =15V: No oscillation
KA
R1 (10K)
150
IKA
A
B
0.1uF
Load Capacitance
1uF 2uF
R2
Figure 15. Stability Boundary Conditions vs. Load Capacitance
Apr. 2005 Rev. 1. 7
BCD Semiconductor Manufacturing Limited
11
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| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet AZ431.PDF ] | |
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