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
bandgap tolerance: 0.5% and 1%.
These ICs are available in 4 packages: TO-92, SOT-
23-3, SOT-23-5, SOT-89.
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 55µA 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
SOT-23-5
SOT-23-3
TO-92
SOT-89
Figure 1. Package Types of AZ431L
Apr. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
1
Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Pin Configuration
N Package
(SOT-23-3)
ANODE
Z Package
(TO-92)
K Package
(SOT-23-5)
R Package
(SOT-89)
3
2
1
CATHODE
3
ANODE
1
REF
CATHODE
REF
CATHODE
3
4
REF
REF
ANODE CATHODE
2
NC
2
1
2
3
NC
1
5
ANODE
Figure 2. Pin Configuration of AZ431L (Top View)
Functional Block Diagram
CATHODE
REF
+
-
V
REF
ANODE
Figure 3. Functional Block Diagram of AZ431L
Apr. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
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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: Tube or Bulk
Bandage Tolerance
A: 0.5%
B: 1%
Package
Z: TO-92
N: SOT-23-3
K: SOT-23-5
R: SOT-89
Package
Tempera-
ture Range
Voltage
Tolerance
0.50%
Part Number
Tin Lead
AZ431LAZ
AZ431LAZTR
AZ431LBZ
AZ431LBZTR
AZ431LANTR
AZ431LBNTR
AZ431LAKTR
AZ431LBKTR
AZ431LARTR
AZ431LBRTR
Lead Free
AZ431LAZ-E1
AZ431LAZTR-E1
AZ431LBZ-E1
AZ431LBZTR-E1
AZ431LANTR-E1
AZ431LBNTR-E1
AZ431LAKTR-E1
AZ431LBKTR-E1
AZ431LARTR-E1
AZ431LBRTR-E1
Marking ID
Tin Lead
AZ431LAZ
AZ431LAZ
AZ431LBZ
AZ431LBZ
N46
N47
K41
K42
R41A
R41B
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
0.50%
1%
1%
SOT-23-3
-40 to 125
o
C
-40 to 125
o
C
-40 to 125
o
C
0.50%
1%
0.50%
1%
0.50%
1%
SOT-23-5
SOT-89
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Apr. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
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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
Power Dissipation
Storage Temperature Range
Symbol
V
KA
I
KA
I
REF
P
D
T
STG
Value
20
-100 to 100
10
Z,R Package
N,K Package
-65 to 150
TO-92
Package Thermal Impedance
Q
JA
SOT-23-3
SOT-23-5
SOT-89
130
330
250
100
o
C/W
Unit
V
mA
mA
770
370
mW
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
Apr. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
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Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Electrical Characteristics
(Typical and limits apply for T
J
=25
o
C unless otherwise noted.)
Parameter
Reference Voltage
0.5%
1%
Test
Symbol
Circuit
4
4
V
REF
Conditions
V
KA
=V
REF,
I
KA
=10mA
0
o
C to 70
o
C
-40
o
C to 85
o
C
Min
1.234
1.228
Typ
1.240
1.240
2
3
-0.5
Max
1.246
1.252
10
mV
10
-1.5
mV/V
µ
A
µ
A
µ
A
µ
A
Unit
V
Deviation of Reference Voltage
Over-Temperature
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
V
KA
=V
REF
∆V
REF
I
KA
=10mA
5
∆V
REF
I
KA
=10mA,
∆V
KA
∆V
KA
:V
REF
to 16V
I
REF
∆I
REF
I
KA
(MIN)
I
KA
(OFF)
Z
KA
I
KA
=10mA, R1=10KΩ, R2=∞
I
KA
=10mA, R1=10KΩ, R2=∞
T
A
=-40 to 85 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
o
5
0.15
0.4
5
4
6
4
0.1
55
0.04
0.01
0.05
0.4
80
0.10
0.05
0.15
Ω
Apr. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
5
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