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 VREF(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/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
Benefits
·Easier to Stabilize
·Ultra Low Temperature Coefficient
·Higher VREF Accuracy
·Wider Operating Temperature Range
·Very Competitive Price
Parametric Table
AZ431A-A AZ431B-A
IKA (Max) (mA) 100 100
IKA (Min) (mA) 0.4 0.4
VOUT / VREF Initial
Tol. (%) 0.4 0.8
VOUT (Max) (V) 36 36
VOUT (Min) (V) 2.5 2.5
ZKA (Typ) (Ω)0.15 0.15
Temp Coeff. (Typ)
(PPM/oC)20 20
Operating Temperature
(Min) (oC)-40 -40
Operating Temperature
(Max) (oC)+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 To l-
erance
Part Number Marking ID
Packing Type
Tin Lead Lead Free Tin Lead Lead Free
SOT-23-5 -40 to 125oC
0.4% AZ431AK-ATR AZ431AK-ATRE1 K3A E3A Tape & Reel
0.8% AZ431BK-ATR AZ431BK-ATRE1 K3B E3B Tape & Reel
TO-92 -40 to 125oC
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
45
6
7
8
ANODE
ANODE
ANODE
TO-92
SOT-23-5
NC
CATHODE
ANODE
REF3
2
1
4
5
NC
4
CATHODE
ANODE
REF
1
2
3
