Description
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.
The AZ431-A series ICs are of 40V voltage type. Its out-
put voltage can be set to any value between V
REF
(2.5V)
and 36V.
The AZ431-A precision reference is offered in two band-
gap tolerance: 0.4% and 0.8%.
Features
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/
o
C Typical
Low Dynamic Output Resistance: 0.2 Typical
Sink Current Capacity from 1mA to 100 mA
Low Output Noise
Wide Operating Range of -40 to 125
o
C
Applications
Charger
Voltage Adapter
Switching Power Supply
Graphic Card
Precision Voltage Reference
Benefits
Easier to Stabilize
Ultra Low Temperature Coefficient
Higher V
REF
Accuracy
Wider Operating Temperature Range
Very Competitive Price
Parametric Table
AZ431A-A
AZ431B-A
I
KA
(Max) (mA)
100
100
I
KA
(Min) (mA)
0.4
0.4
V
OUT
/ V
REF
Initial
Tol. (%)
0.4
0.8
V
OUT
(Max) (V)
36
36
V
OUT
(Min) (V)
2.5
2.5
Z
KA
(Typ) (
)
0.15
0.15
Temp Coeff. (Typ)
(PPM/
o
C
)
20
20
Operating Temperature
(Min) (
o
C
)
-40
-40
Operating Temperature
(Max) (
o
C
)
+125
+125
Additional Available Materials
Samples
Datasheet
Reliability Report
ESD Report
Nov. 2004
BCD Semiconductor Manufacturing Limited
Product Brief
ADJUSTABLE PRECISION SHUNT REGULATORS AZ431-A
Pin Configuration
SOT-23-3
SOT-89
ANODE
REF
CATHODE
REF
ANODE CATHODE
1
2
3
1
2
3
Product Brief
ADJUSTABLE PRECISION SHUNT REGULATORS AZ431-A
Ordering Information Example
Package
Temperature
Range
Voltage Tol-
erance
Part Number
Marking ID
Packing Type
Tin Lead
Lead Free
Tin Lead
Lead Free
SOT-23-5
-40 to
125
o
C
0.4%
AZ431AK-ATR
AZ431AK-ATRE1
K3A
E3A
Tape & Reel
0.8%
AZ431BK-ATR
AZ431BK-ATRE1
K3B
E3B
Tape & Reel
TO-92
-40 to
125
o
C
0.4%
AZ431AZ-A
AZ431AZ-AE1
AZ431AZ-A
AZ431AZ-AE1
Bulk
0.4%
AZ431AZ-ATR
AZ431AZ-ATRE1
AZ431AZ-A
AZ431AZ-AE1
Ammo
0.8%
AZ431BZ-A
AZ431BZ-AE1
AZ431BZ-A
AZ431BZ-AE1
Bulk
0.8%
AZ431BZ-ATR
AZ431BZ-ATRE1
AZ431BZ-A
AZ431BZ-AE1
Ammo
Detailed information please refer to the relevant datasheet.
Sales Office:
USA
3170 De La Cruz Blvd, Suite # 105 Santa Clara, CA 95054-2411,
U.S.A
Tel : +1-408-988 6388
Fax : +1-408-988 6386
Taiwan
4F, 298-1 Rui Guang Road, Nei-Hu District, Taipei,
Taiwan
Tel : 886-2-2656-2808
Fax : 886-2-2656-2806
Shanghai
8F, B Zone, 900 Yi Shan Road, Shanghai 200233,
China
Tel : 86-21-6495 9539
Fax : 86-21-6485 9673
Shenzhen
Room 27B, Tower C, No. 2070, Shennanzhong Road, Shenzhen
518031, China
Tel : 86-755-8368 3987
Fax : 86-755-8368 3166
Nov. 2004
BCD Semiconductor Manufacturing Limited
Pin Configuration
Circuit Type
Bandgap Tolerance
B: 0.8%
A: 0.4%
E1: Lead-Free
Blank: Tin Lead
A Z 431 -
A: AZ431(40V)
B: AZ431(20V)
Package
M: SOIC-8 Z: TO-92
N: SOT-23-3 K:SOT-23-5
R: SOT-89
TR: Tape/Reel or Ammo
Blank: Tube or Bulk
SOIC-8
REF
ANODE
NC
CATHODE
NC
1
2
3
4
5
6
7
8
ANODE
ANODE
ANODE
TO-92
SOT-23-5
NC
CATHODE
ANODE
REF
3
2
1
4
5
NC
4
CATHODE
ANODE
REF
1
2
3
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