Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
General Description
The AZ432 series ICs are low voltage three-terminal
adjustable 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 for Zener diodes in applications such as
switching power supply, charger, motherboard and
other adjustable regulators.
The output voltage can be set to any value between
1.25V and 18V with two external resistors.
The AZ432 precision reference is offered in two volt-
age tolerance: 0.5% and 1.0%.
These ICs are available in 4 packages: TO-92 (bulk or
ammo packing), SOT-23, SOT-23-5 and SOT-89.
Features
·
·
·
·
·
·
·
·
Wide Programmable Precise Output Voltage from
1.25V to 18V
High Stability under Capacitive Load
Low Temperature Deviation: 3mV Typical
Low Equivalent Full-Range Temperature Coeffi-
cient: 20PPM/
o
C Typical
Low Dynamic Output Resistance: 0.05Ω Typical
High Sink Current Capacity from 0.1mA to 100
mA
Low Output Noise
Wide Operating Range of -40 to 125
o
C
Applications
·
·
·
·
·
Graphic Card
PC Motherboard
Voltage Adapter
Switching Power Supply
Charger
TO-92(Bulk Packing)
TO-92(Ammo Packing)
SOT-89
SOT-23-5
SOT-23
Figure 1. Package Types of AZ432
Dec. 2007 Rev. 1. 7
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BCD Semiconductor Manufacturing Limited
Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Pin Configuration
Z Package
(TO-92(Bulk Packing))
Z Package
(TO-92(Ammo Packing))
N Package
(SOT-23)
ANODE
3
2
1
CATHODE
ANODE
REF
3
2
1
CATHODE
3
ANODE
1
REF
REF
CATHODE
2
K Package
(SOT-23-5)
R Package
(SOT-89)
NC
NC
CATHODE
1
2
3
5
ANODE
1
4
REF
REF
2
3
ANODE CATHODE
Figure 2. Pin Configuration of AZ432 (Top View)
Functional Block Diagram
CATHODE
REF
+
-
V
REF
ANODE
Figure 3. Functional Block Diagram of AZ432
Dec. 2007 Rev. 1. 7
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BCD Semiconductor Manufacturing Limited
Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Ordering Information
AZ432
Circuit Type
-
E1: Lead Free
Blank: Tin Lead
TR: Tape and Reel or Ammo
Blank: Bulk
Bandage Tolerance
A: 0.5%
B: 1.0%
Package
Z: TO-92
N: SOT-23
K: SOT-23-5
R: SOT-89
Package
Tempera-
ture Range
Voltage
Tolerance
0.5%
Part Number
Tin Lead
AZ432AZ
AZ432AZTR
AZ432BZ
AZ432BZTR
Lead Free
AZ432AZ-E1
AZ432AZTR-E1
AZ432BZ-E1
AZ432BZTR-E1
AZ432ANTR-E1
AZ432BNTR-E1
AZ432AKTR
AZ432BKTR
AZ432ARTR
AZ432BRTR
AZ432AKTR-E1
AZ432BKTR-E1
AZ432ARTR-E1
AZ432BRTR-E1
K43
K44
R42A
R42B
Marking ID
Tin Lead
AZ432AZ
AZ432AZ
AZ432BZ
AZ432BZ
Lead Free
AZ432AZ-E1
AZ432AZ-E1
AZ432BZ-E1
AZ432BZ-E1
EA8
EA9
E7A
E8A
E42A
E42B
Packing
Type
Bulk
Ammo
Bulk
Ammo
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
TO-92
-40 to 125
o
C
0.5%
1.0%
1.0%
SOT-23
-40 to 125
o
C
-40 to 125
o
C
-40 to 125
o
C
0.5%
1.0%
0.5%
1.0%
0.5%
1.0%
SOT-23-5
SOT-89
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Dec. 2007 Rev. 1. 7
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BCD Semiconductor Manufacturing Limited
Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Absolute Maximum Ratings (Note 1)
Parameter
Cathode Voltage
Cathode Current Range (Continuous)
Reference Input Current Range
Symbol
V
KA
I
KA
I
REF
P
D
N, K Package
Junction Temperature
Storage Temperature Range
T
J
T
STG
150
-65 to 150
370
o
Value
20
-100 to 100
10
Z, R Package
770
Unit
V
mA
mA
Power Dissipation
mW
C
o
C
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 Operation Ratings
Parameter
Cathode Voltage
Cathode Current
Operating Ambient Temperature Range
Symbol
V
KA
I
KA
Min
V
REF
0.1
-40
Max
18
100
125
Unit
V
mA
o
C
Dec. 2007 Rev. 1. 7
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BCD Semiconductor Manufacturing Limited
Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Electrical Characteristics
(Typical and limits apply for T
A
=25
o
C, unless otherwise noted.)
Parameter
Reference Voltage
0.5%
1.0%
Test
Circuit
4
Symbol
V
REF
Conditions
V
KA
=V
REF,
I
KA
=10mA
0 to 70
o
C
Deviation of Reference Voltage
Over Full Temperature Range
Ratio of Change in V
REF
to the
Change in Cathode Voltage
Reference Input Current
Deviation of Reference Current
Over Full Temperature Range
Minimum Cathode Current for
Regulation
Off-state Cathode
Current
Dynamic Impedance
4
∆V
REF
∆V
REF
∆V
KA
I
REF
∆I
REF
I
KA
(MIN)
I
KA
(OFF)
Z
KA
V
KA
=V
REF
I
KA
=10mA
-40 to 85
o
C
-40 to 125
o
C
5
5
5
4
6
4
I
KA
=10mA,
∆V
KA
: V
REF
to 16V
I
KA
=10mA, R1=10KΩ, R2=∞
I
KA
=10mA, R1=10KΩ, R2=∞
T
A
=-40 to 125
o
C
V
KA
=V
REF
V
REF
=0, V
KA
=18V
V
KA
=6V, V
REF
=0
V
KA
=V
REF
, I
KA
=1 to 100mA
f≤1.0kHz
Min
1.244
1.238
Typ
1.250
1.250
2
3
4
-0.5
0.15
0.1
55
0.04
0.01
0.05
Max
1.256
1.262
10
10
15
-1.5
0.4
0.4
80
0.10
0.05
0.15
Ω
mV/V
µA
µA
µA
µA
mV
Unit
V
Dec. 2007 Rev. 1. 7
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BCD Semiconductor Manufacturing Limited
