Product Brief
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431-A
Description
Parametric Table
The AZ431-A series ICs are three-terminal adjustable
shunt regulators with guaranteed thermal stability over a
full operation range. These ICs feature sharp turn-on char-
acteristics, 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.
AZ431A-A AZ431B-A
I
KA (Max) (mA)
100
0.4
100
0.4
IKA (Min) (mA)
VOUT / VREF Initial
Tol. (%)
0.4
0.8
V
OUT (Max) (V)
36
36
The AZ431-A series ICs are of 40V voltage type. Its out-
put voltage can be set to any value between VREF(2.5V)
V
OUT (Min) (V)
2.5
0.15
2.5
0.15
and 36V.
ZKA (Typ) (Ω)
The AZ431-A precision reference is offered in two band-
gap tolerance: 0.4% and 0.8%.
Temp Coeff. (Typ)
(PPM/oC)
20
20
Operating Temperature
(Min) (oC)
Features
-40
+125
-40
·
Programmable Precise Output Voltage from 2.5V to
36V
Very Accurate Reference Voltage: 0.15% Typical
High Stability under Capacitive Load
Low Temperature Deviation: 4.5mV Typical
Low Equivalent Full-range Temperature Coefficient
with 20PPM/oC Typical
Low Dynamic Output Resistance: 0.2Ω Typical
Sink Current Capacity from 1mA to 100 mA
Low Output Noise
Operating Temperature
(Max) (oC)
+125
·
·
Benefits
·
·
·
Easier to Stabilize
Ultra Low Temperature Coefficient
Higher VREF Accuracy
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Wider Operating Temperature Range
Very Competitive Price
Wide Operating Range of -40 to 125oC
Applications
Additional Available Materials
·
Charger
Voltage Adapter
Switching Power Supply
Graphic Card
·
Samples
Datasheet
Reliability Report
ESD Report
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Precision Voltage Reference
Pin Configuration
SOT-23-3
SOT-89
ANODE
3
1
2
3
1
2
REF ANODE CATHODE
REF
CATHODE
Nov. 2004
BCD Semiconductor Manufacturing Limited