Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
General Description
The AZ431L 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
1.24V and 18V with two external resistors.
The AZ431L 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, SOT-89-3.
Features
·
·
·
·
·
·
·
·
Wide Programmable Precise Output Voltage from
1.24V 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
100mA
Low Output Noise
Wide Operating Range of -40 to 125
o
C
Applications
·
·
·
·
·
Graphic Card
PC Motherboard
Voltage Adapter
Switching Power Supply
Charger
SOT-89-3
TO-92
TO-92 Ammo Packing
SOT-23
SOT-23-5
Figure 1. Package Types of AZ431L
Mar. 2007 Rev. 1. 7
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BCD Semiconductor Manufacturing Limited
Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Pin Configuration
Z Package
(TO-92)
Z Package
(TO-92 Ammo Packing)
N Package
(SOT-23)
ANODE
3
2
1
CATHODE
ANODE
REF
3
2
1
CATHODE
ANODE
REF
REF
1
3
2
CATHODE
K Package
(SOT-23-5)
R Package
(SOT-89-3)
NC
NC
CATHODE
1
2
5
ANODE
1
3
4
REF
2
3
REF ANODE CATHODE
Figure 2. Pin Configuration of AZ431L (Top View)
Functional Block Diagram
CATHODE
REF
+
-
V
REF
ANODE
Figure 3. Functional Block Diagram of AZ431L
Mar. 2007 Rev. 1. 7
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BCD Semiconductor Manufacturing Limited
Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Ordering Information
AZ431L
-
E1: Lead Free
Blank: Tin Lead
Circuit Type
TR: Tape and Reel or Ammo
Blank: Bulk
Voltage Tolerance
A: 0.5%
B: 1.0%
Package
Z: TO-92
N: SOT-23
K: SOT-23-5
R: SOT-89-3
Package
Tempera-
ture Range
Voltage
Tolerance
0.5%
Part Number
Tin Lead
AZ431LAZ
AZ431LAZTR
AZ431LBZ
AZ431LBZTR
Lead Free
AZ431LAZ-E1
AZ431LAZTR-E1
AZ431LBZ-E1
AZ431LBZTR-E1
AZ431LANTR-E1
AZ431LBNTR-E1
AZ431LAKTR
AZ431LBKTR
AZ431LARTR
AZ431LBRTR
AZ431LAKTR-E1
AZ431LBKTR-E1
AZ431LARTR-E1
AZ431LBRTR-E1
K41
K42
R41A
R41B
Marking ID
Tin Lead
AZ431LAZ
AZ431LAZ
AZ431LBZ
AZ431LBZ
Lead Free
AZ431LAZ-E1
AZ431LAZ-E1
AZ431LBZ-E1
AZ431LBZ-E1
EA6
EA7
E5A
E6A
E41A
E41B
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-89-3
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Mar. 2007 Rev. 1. 7
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BCD Semiconductor Manufacturing Limited
Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
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 Maxi-
mum Ratings" for extended periods may affect device reliability.
Recommended Operating Conditions
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
Mar. 2007 Rev. 1. 7
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BCD Semiconductor Manufacturing Limited
Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Electrical Characteristics
(Operating Conditions: T
A
=25
o
C, unless otherwise noted.)
Parameter
Reference Voltage
0.5%
1.0%
Test
Symbol
Circuit
4
V
REF
Conditions
V
KA
=V
REF,
I
KA
=10mA
0
o
C to 70
o
C
Deviation of Reference Voltage
Over Full Temperature Range
4
∆V
REF
V
KA
=V
REF
I
KA
=10mA
-40
o
C to 85
o
C
-40
o
C to 125
o
C
Ratio of Change in V
REF
to the
Change in Cathode Voltage
5
∆V
REF
I
KA
=10mA,
∆V
KA
∆V
KA
:V
REF
to 16V
I
REF
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
=6, V
REF
=0
V
KA
=V
REF
, I
KA
=1 to 100mA
f≤ 1.0kHz
Min
1.234
1.228
Typ
1.240
1.240
2
3
4
-0.5
Max
1.246
1.252
10
10
15
-1.5
mV/V
mV
Unit
V
Reference Input Current
5
0.15
0.4
µA
Deviation of Reference Current
Over Full Temperature Range
Minimum Cathode Current for
Regulation
Off-state Cathode Current
Dynamic Impedance
5
∆I
REF
I
KA
(Min)
I
KA
(Off)
Z
KA
0.1
0.4
µA
4
55
0.04
0.01
0.05
80
0.10
0.05
0.15
µA
µA
6
4
Ω
Mar. 2007 Rev. 1. 7
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BCD Semiconductor Manufacturing Limited
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