Page 1
AZ431L
Document number: DS36801 Rev. 3 - 2
1 of 18
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January 2014
© Diodes Incorporated
AZ431L
A Product Line of
Diodes Incorporated
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 voltage 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 1.24V to 18V
High Stability under Capacitive Load
Low Temperature Deviation: 3mV Typical
Low Equivalent Full-range Temperature Coefficient: 20PPM/oC
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 +125oC
Applications
Graphic Card
PC Motherboard
Voltage Adapter
Switching Power Supply
Charger
1
2
3
CATHODE
ANODE
REF
CATHODE
ANODE
REF
3
2
1
CATHODE
ANODE
REF
1
2
3
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
Pin Assignments
(TO-92 (Bulk Packing)/ Z Package) (TO-92 (Ammo Packing)/ Z Package) (SOT-23/ N Package)
(Top View) (Top View) (Top View)
Page 2
AZ431L
Document number: DS36801 Rev. 3 - 2
2 of 18
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© Diodes Incorporated
AZ431L
A Product Line of
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CATHODE
ANODE
REF
1
2
3
4
5NC
*
(Note 1)
1 2 3
REF ANODE CATHODE
1 2
3
REF ANODE CATHODE
Pin Assignments (Cont.)
(Top View) (Top View) (Top View)
(SOT-23-5/ K Package) (SOT-89 Option 1/ R Package) (SOT-89 Option 2/ R Package)
Note 1: *Pin 2 is attached to substrate and must be connected to ANODE or open.
Typical Applications Circuit
Shunt Regulator
High Current Shunt Regulator
Page 3
AZ431L
Document number: DS36801 Rev. 3 - 2
3 of 18
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January 2014
© Diodes Incorporated
AZ431L
A Product Line of
Diodes Incorporated
Typical Applications Circuit (Cont.)
Current Source or Current Limit
Precision 5V 1A Regulator
PWM Converter with Reference
Page 4
AZ431L
Document number: DS36801 Rev. 3 - 2
4 of 18
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January 2014
© Diodes Incorporated
AZ431L
A Product Line of
Diodes Incorporated
Symbol
Parameter
Rating
Unit
VKA
Cathode Voltage
20
V
I
KA
Cathode Current Range (Continuous)
-100 to 100
mA
I
REF
Reference Input Current Range
10
mA
P
D
Power Dissipation
Z, R Package
770
mW
N, K Package
370
TJ
Junction Temperature
+150
ºC
T
STG
Storage Temperature Range
-65 to +150
ºC
Symbol
Parameter
Min
Max
Unit
V
KA
Cathode Voltage
V
REF
18
V
I
KA
Cathode Current
0.1
100
mA
–
Operating Ambient Temperature Range
-40
+125
ºC
Functional Block Diagram
Absolute Maximum Ratings (Note 2)
Note 2: 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 Operating Conditions
Page 5
AZ431L
Document number: DS36801 Rev. 3 - 2
5 of 18
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January 2014
© Diodes Incorporated
AZ431L
A Product Line of
Diodes Incorporated
Symbol
Parameter
Test
Circuit
Conditions
Min
Typ
Max
Unit
V
REF
Reference Voltage
0.5%
4
V
KA
= V
REF
, I
KA
= 10mA
1.234
1.240
1.246
V
1.0%
1.228
1.240
1.252
∆V
REF
Deviation of Reference Voltage
Over Full Temperature Range
4
V
KA
= V
REF
,
I
KA
= 10mA
0 to +70°C
– 2 10
mV
-40 to +85°C
– 3 10
-40 to +125°C
– 4 15
∆V
REF
∆VKA
Ratio of Change in V
REF
to the
Change in Cathode Voltage
5
I
KA
= 10mA,
∆VKA: V
REF
to 16V
–
-0.5
-1.5
mV/V
I
REF
Reference Input Current
5
I
KA
= 10mA, R1 = 10KΩ, R2 = ∞
–
0.15
0.4
µA
∆I
REF
Deviation of Reference Current
Over Full Temperature Range
5
I
KA
= 10mA, R1 = 10KΩ, R2 = ∞,
TA = -40 to +125°C
–
0.1
0.4
µA
I
KA
(Min)
Minimum Cathode Current for
Regulation
4
V
KA
= V
REF
–
55
80
µA
I
KA
(Off)
Off-state Cathode Current
6
V
REF
= 0, V
KA
= 18V
–
0.04
0.10
µA
V
KA
= 6, V
REF
= 0
–
0.01
0.05
Z
KA
Dynamic Impedance
4
V
KA
= V
REF
, IKA = 1 to 100mA,
f ≤ 1.0KHz
–
0.05
0.15
Ω
θ
JC
Thermal Resistance
–
SOT-23
–
84.84
–
°C/W
SOT-23-5
–
84.84
–
TO-92
–
140.80
–
SOT-89
–
29.80
–
Electrical Characteristics (Operating Conditions: T
= +25 ºC, unless otherwise noted.)
A
Page 6
AZ431L
Document number: DS36801 Rev. 3 - 2
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Electrical Characteristics (Cont.)
Test Circuit 4 for V
KA
= V
REF
Test Circuit 5 for V
Test Circuit 6 for I
> V
REF
KA
OFF
Page 7
AZ431L
Document number: DS36801 Rev. 3 - 2
7 of 18
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© Diodes Incorporated
AZ431L
A Product Line of
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-50 -25 0 25 50 75 100 125 150
1.235
1.236
1.237
1.238
1.239
1.240
1.241
1.242
Reference Voltage (V)
Ambient Temperature (oC)
VKA=V
REF
IKA=10mA
-50 -25 0 25 50 75 100 125
0.12
0.13
0.14
0.15
0.16
0.17
0.18
R1=10K
R2=Infinite
IKA=10mA
Ambient Temperature (oC)
Reference Current (
A)
-1 0 1
-150
-100
-50
0
50
100
150
Cathode Current (mA)
Cathode Voltage (V)
VKA=V
REF
TA=25oC
-1 0 1
-300
-200
-100
0
100
200
300
400
Cathode Current (
A)
Cathode Voltage (V)
VKA=V
REF
TA=25oC
1k 10k 100k
-10
0
10
20
30
40
50
60
70
Voltage Gain (dB)
Small Signal Frequency (Hz)
TA=250C
IKA=10mA
Performance Characteristics
Reference Voltage vs. Ambient Temperature Reference Current vs. Ambient Temperature
Cathode Current vs. Cathode Voltage Cathode Current vs. Cathode Voltage
Small Signal Voltage Gain vs. Frequency
Page 8
AZ431L
Document number: DS36801 Rev. 3 - 2
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© Diodes Incorporated
AZ431L
A Product Line of
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1k 10k 100k 1M
0.01
0.1
1
10
IKA=1mA to 100mA
Dynamic Impedance (
)
Frequency (Hz)
-1 0 1 2 3 4 5 6
0
1
2
3
Input
Input and output voltage (V)
Time (S)
Output
-40 -20 0 20 40 60 80 100 120
-0.55
-0.50
-0.45
-0.40
-0.35
-0.30
IKA=10mA
V
KA=VREF
to 16V
Ratio of
V
REF
to V
KA
(mV/V)
Ambient Temperature (oC)
Performance Characteristics (Cont.)
Dynamic Impedance vs. Frequency
Pulse Response of Input and Output Voltage
Ratio of Delta Reference Voltage to the Ratio of
Cathode Voltage vs. Ambient Temperature
Page 9
AZ431L
Document number: DS36801 Rev. 3 - 2
9 of 18
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January 2014
© Diodes Incorporated
AZ431L
A Product Line of
Diodes Incorporated
AZ431L X X XX - XX
PackingPackage
TR : Tape & Reel
A : 0.5%
B : 1.0%
E1 : Lead Free
Product Name
E1/G1
Blank : Bulk
G1 : Green
Voltage Tolerance
Z : TO-92
N : SOT-23
K : SOT-23-5
R : SOT-89
or Ammo
Package
Temperature
Range
Voltage
Tolerance
Part Number
Marking ID
Packing
Type
Lead Free
Green
Lead Free
Green
TO-92
-40 to +125°C
0.5%
AZ431LAZ-E1
AZ431LAZ-G1
AZ431LAZE1
AZ431LAZ-G1
Bulk
0.5%
AZ431LAZTRE1
AZ431LAZTRG1
AZ431LAZE1
AZ431LAZ-G1
Ammo
1.0%
AZ431LBZ-E1
AZ431LBZ-G1
AZ431LBZE1
AZ431LBZ-G1
Bulk
1.0%
AZ431LBZTRE1
AZ431LBZTRG1
AZ431LBZE1
AZ431LBZ-G1
Ammo
SOT-23
-40 to +125°C
0.5%
AZ431LANTRE1
AZ431LANTRG1
EA6
GA6
Tape &
Reel
1.0%
AZ431LBNTRE1
AZ431LBNTRG1
EA7
GA7
Tape &
Reel
SOT-23-5
-40 to +125°C
0.5%
AZ431LAKTRE1
AZ431LAKTRG1
E5A
G5A
Tape &
Reel
1.0%
AZ431LBKTRE1
AZ431LBKTRG1
E6A
G6A
Tape &
Reel
SOT-89
-40 to +125°C
0.5%
AZ431LARTRE1
AZ431LARTRG1
E41A
G41A
Tape &
Reel
1.0%
AZ431LBRTRE1
AZ431LBRTRG1
E41B
G41B
Tape &
Reel
Ordering Information
Diodes IC's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Products with "G1" suffix are available in green packages.
Page 10
AZ431L
Document number: DS36801 Rev. 3 - 2
10 of 18
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© Diodes Incorporated
AZ431L
A Product Line of
Diodes Incorporated
2.420(0.095)
2.660(0.105)
0.360(0.014)
0.760(0.030)
Φ
1.600(0.063)
MAX
12.500(0.492)
15.500(0.610)
1.270(0.050)
TYP
3.300(0.130)
3.700(0.146)
4.300(0.169)
4.700(0.185)
1.000(0.039)
1.400(0.055)
4.400(0.173)
4.800(0.189)
3.430(0.135)
MIN
0.320(0.013)
0.510(0.020)
0.000(0.000)
0.380(0.015)
Package Outline Dimensions (All dimensions in mm(inch).)
(1) Package Type: TO-92 (Bulk Packing)
Page 11
AZ431L
Document number: DS36801 Rev. 3 - 2
11 of 18
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© Diodes Incorporated
AZ431L
A Product Line of
Diodes Incorporated
4.300(0.169)
4.700(0.185)
1
2.500(0.492)14.500(0.571)
2.540(0.100
)
Ty
p
1.270(0.050
)
Typ
0.
(0.015)
0.
550
(0.022
)
4.400(0.173
)
4.
800
(
0.
189
)
3.430(0.135
)
MIN
0.320(0.013
)
0
.510(0.020
)
0.000(0.000
)
0.380(0.015
)
MAX
1.100(0.043
1.400(0.055
)
3.300(0.130)
3.800(0.150)
Φ
1.600(0.063)
)
380
2.500(0.098
)
4.
000
(
0.
157
)
13.000(0.512
)
15.
000
(
0.
591
)
Package Outline Dimensions (Cont. All dimensions in mm(inch).)
(2) Package Type: TO-92 (Ammo Packing)
Page 12
AZ431L
Document number: DS36801 Rev. 3 - 2
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© Diodes Incorporated
AZ431L
A Product Line of
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2.300(0.091)
2.500(0.098)
1.200(0.047)
1.400(0.055)
0.890(0.035)
1.030(0.041)
0.300(0.012)
0.510(0.020)
1.900(0.075)REF
2.800(0.110)
3.000(0.118)
2.0°
3.0°
0.500(0.020)
0.700(0.028)
1.050(0.041)REF
0.010(0.0004)
0.100(0.004)
0.900(0.035)
1.100(0.043)
4×
R0.100(0.004)
7.0°
7.0°
0.550(0.022)REF
0.200(0.008)MIN
0.100(0.004) GAUGE PLANE
0.080(0.003)
0.180(0.007)
R0.100(0.004)
0.0°~10.0°
Package Outline Dimensions (Cont. All dimensions in mm(inch).)
(3) Package Type: SOT-23
Page 13
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Document number: DS36801 Rev. 3 - 2
13 of 18
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© Diodes Incorporated
AZ431L
A Product Line of
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2.820(0.111)
2.650(0.104)
1
.
500
(
0
.
059
)
0
.
000
(
0
.
000
)
0.300(0.012)
0.950(0.037)
0
.
900
(
0
.
035
)
0.100(0.004)
0.200(0.008)
0
.
300
(
0
.
012
)
8°
0°
3.100(0.122)
1
.
700
(
0
.
067
)
3
.
000
(
0
.
118
)
0.500(0.020)
0
.
150
(
0
.
006
)
1
.300(
0.051
)
0.200(0.008)
0
.
600
(
0
.
024
)
1.800(0.071)
2.000(0.079)
0
.
700
(
0
.
028
)
REF
TYP
1
.
450
(
0
.
057
)
MAX
Package Outline Dimensions (Cont. All dimensions in mm(inch).)
(4) Package Type: SOT-23-5
Page 14
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Document number: DS36801 Rev. 3 - 2
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A Product Line of
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45
1.550(0.061)REF
4.400(0.173)
4.600(0.181)
0.900(0.035)
1.200(0.047)
3.950(0.156)
4.250(0.167)
3.000(0.118)
TYP
0.480(0.019)
2.300(0.091)
2.600(0.102)
0.320(0.013)
0.540(0.021)
3
10
2.060(0.081)REF
1.400(0.055)
1.600(0.063)
0.350(0.014)
0.450(0.018)
R0.150(0.006)
3
10
1.500(0.059)
0.320(0.013)REF
1.620(0.064)REF
2.210(0.087)REF
0.320(0.013)
0.540(0.021)
1.800(0.071)
Option 1 Option 2
0.620(0.024)
1.030(0.041)REF
R 0.200(0.008)
1.620(0.064)
1.830(0.072)
2.630(0.104)
2.930(0.115)
Option 1
Package Outline Dimensions (Cont. All dimensions in mm(inch).)
(5) Package Type: SOT-89
Page 15
AZ431L
Document number: DS36801 Rev. 3 - 2
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Y
G
Z
Y
X E
Grid placement courtyard
Dimensions
Z
(mm)/(inch)
G
(mm)/(inch)
X
(mm)/(inch)
Y
(mm)/(inch)
E
(mm)/(inch)
Value
2.900/0.114
1.100/0.043
0.800/0.031
0.900/0.035
0.950/0.037
Suggested Pad Layout
(1) Package Type: SOT-23
Page 16
AZ431L
Document number: DS36801 Rev. 3 - 2
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E2
E1
Y
X
G
Z
Dimensions
Z
(mm)/(inch)
G
(mm)/(inch)
X
(mm)/(inch)
Y
(mm)/(inch)
E1
(mm)/(inch)
E2
(mm)/(inch)
Value
3.600/0.142
1.600/0.063
0.700/0.028
1.000/0.039
0.950/0.037
1.900/0.075
Suggested Pad Layout (Cont.)
(2) Package Type: SOT-23-5
Page 17
AZ431L
Document number: DS36801 Rev. 3 - 2
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X1
X2
Y1
E
X
Y
Z
Dimensions
Z
(mm)/(inch)
X
(mm)/(inch)
X1
(mm)/(inch)
X2
(mm)/(inch)
Y
(mm)/(inch)
Y1
(mm)/(inch)
E
(mm)/(inch)
Value
4.600/0.181
0.550/0.022
1.850/0.073
0.800/0.031
1.300/0.051
1.475/0.058
1.500/0.059
Suggested Pad Layout (Cont.)
(3) Package Type: SOT-89
Page 18
AZ431L
Document number: DS36801 Rev. 3 - 2
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© Diodes Incorporated
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A Product Line of
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DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
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representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2012, Diodes Incorporated
www.diodes.com
IMPORTANT NOTICE
LIFE SUPPORT
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