AS431_18 [DIODES]
ADJUSTABLE PRECISION SHUNT REGULATORS;
| 型号： | AS431_18 |
| 厂家： | 
DIODES INCORPORATED |
| 描述： | ADJUSTABLE PRECISION SHUNT REGULATORS |
| 文件： | 总20页 (文件大小：558K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AS431
ADJUSTABLE PRECISION SHUNT REGULATORS
Description
Pin Assignments
The AS431 is a three-terminal adjustable shunt regulator with
guaranteed thermal stability over a full operation range. It features
sharp turn-on characteristics, low temperature coefficient and low
output impedance, which make it ideal substitute for Zener diode in
applications such as switching power supply, charger and other
adjustable regulators.
(Top View)
(Top View)
ANODE
3
NC
1
2
3
5
4
ANODE
REF
*
(Note 4)
The output voltage of AS431 can be set to any value between VREF
(2.5V) and the corresponding maximum cathode voltage (36V).
CATHODE
1
2
REF
CATHODE
The AS431 precision reference is offered in two voltage tolerance:
0.5% and 1.0%.
SOT23
SOT25
Note 4: * Pin 2 is attached to substrate and must be connected to ANODE or
open.
This IC is available in 4 packages: TO92 (Ammo Packing), SOT23,
SOT25 and SOT89.
(Top View)
(Top View)
Features
Programmable Precise Output Voltage from 2.5V to 36V
High Stability under Capacitive Load
Low Temperature Deviation: 4.5mV Typical
Low Equivalent Full-range Temperature Coefficient with
20PPM/°C Typical
3
1
2
1
2
3
REF ANODE CATHODE
REF ANODE CATHODE
Sink Current Capacity from 1mA to 100mA
Low Output Noise
SOT89 (Option 1)
SOT89 (Option 2)
Wide Operating Range of -40 to +125°C
Lead-Free Packages: SOT23, SOT25, TO92 (Ammo Packing),
SOT89
(Top View)
3
2
CATHODE
ANODE
REF
.
Totally Lead-Free; RoHS Compliant (Notes 1 & 2)
Lead-Free Packages, Available in “Green” Molding Compound:
SOT23, SOT25, TO92 (Ammo Packing), SOT89
.
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
1
.
Halogen and Antimony Free. “Green” Device (Note 3)
TO92 (Ammo Packing)
Applications
Charger
Voltage Adapter
Switching Power Supply
Graphic Card
Precision Voltage Reference
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
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AS431
Document number: DS36599 Rev. 4 - 2
AS431
Typical Applications Circuit
Shunt Regulator
High Current Shunt Regulator
Current Source or Current Limit
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AS431
Document number: DS36599 Rev. 4 - 2
AS431
Typical Applications Circuit (Cont.)
Precision 5V 1A Regulator
PWM Converter with Reference
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AS431
Document number: DS36599 Rev. 4 - 2
AS431
Functional Block Diagram
Absolute Maximum Ratings (Note 5)
Symbol
VKA
Parameter
Unit
V
Rating
40
Cathode Voltage
IKA
Cathode Current Range (Continuous)
Reference Input Current Range
-100 to 150
10
mA
mA
IREF
Z, R Package
N, K Package
+150
770
370
PD
Power Dissipation
mW
TJ
Junction Temperature
°C
°C
V
TSTG
ESD
Storage Temperature Range
ESD (Human Body Model)
-65 to +150
2000
Note 5:
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
Symbol
VKA
Parameter
Cathode Voltage
Unit
V
Min
VREF
1.0
Max
36
mA
°C
IKA
Cathode Current
100
+125
TA
Operating Ambient Temperature Range
-40
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AS431
Document number: DS36599 Rev. 4 - 2
AS431
Electrical Characteristics (Operating Conditions: TA = +25°C, unless otherwise specified.)
Test
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Circuit
0.5%
1.0%
2.487
2.475
—
2.500
2.500
4.5
2.512
2.525
8
4
VKA = VREF, IKA = 10mA
VREF
Reference Voltage
V
0 to +70°C
Deviation of Reference Voltage
Over Full Temperature Range
VKA = VREF,
∆VREF
4
-40 to +85°C
—
4.5
10
mV
IKA = 10mA
-40 to +125°C
∆VKA = 10V to VREF
—
4.5
16
Ratio of Change in Reference
Voltage to the Change in Cathode
Voltage
∆VREF
∆VKA
—
-1.0
-2.7
5
IKA = 10mA
mV/V
∆VKA = 36V to 10V
—
—
-0.5
0.7
-2.0
4
IREF
Reference Current
5
5
IKA = 10mA, R1 = 10kΩ, R2 = ∞
µA
µA
Deviation of Reference Current
Over Full Temperature Range
Minimum Cathode Current for
Regulation
IKA = 10mA, R1 = 10kΩ, R2 = ∞,
TA = -40 to +125°C
—
—
—
—
∆IREF
0.4
0.4
1.2
1.0
1.0
0.5
IKA
(Min)
IKA
4
6
4
VKA = VREF
mA
µA
Ω
Off-state Cathode Current
Dynamic Impedance
VKA = 36V, VREF = 0
0.05
0.15
(Off)
VKA = VREF, IKA = 1 to 100mA,
ZKA
f ≤ 1.0kHz
—
—
—
—
—
—
—
—
SOT23
135.9
135.9
81.9
SOT25
θJC
Thermal Resistance
—
°C/W
TO92 (Ammo Packing)
SOT89
29.8
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AS431
Document number: DS36599 Rev. 4 - 2
AS431
Electrical Characteristics (Cont.)
Test Circuit 4 for VKA = VREF
Test Circuit 5 for VKA > VREF
Test Circuit 6 for IOFF
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AS431
Document number: DS36599 Rev. 4 - 2
AS431
Performance Characteristics
Reference Voltage vs. Ambient Temperature
Reference Current vs. Ambient Temperature
2.510
1.5
VKA = VREF
IKA = 10mA
R1=10K,R2=Infinite
IKA=10mA
2.505
1.0
0.5
0.0
2.500
2.495
2.490
2.485
-60 -40 -20
0
20
40
60
80 100 120 140
-60 -40 -20
0
20
40
60
80 100 120 140
Ambient Temperature (oC)
Ambient Temperature (0C)
Cathode Current vs. Cathode Voltage
Cathode Current vs. Cathode Voltage
800
600
400
200
0
150
100
50
VKA=VREF
TA=250C
VKA=VREF
TA=250C
0
-50
-200
-100
-2
-1
0
1
2
3
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
Cathode Voltage (V)
Cathode Voltage (V)
Off-State Cathode Current
vs. Ambient Temperature
Ratio of Delta Reference Voltage to the
Ratio of Delta Cathode Voltage
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-0.9
-1.0
-1.1
-1.2
-1.3
-1.4
VKA=3.5V to 36V
VKA=36V
VREF=0
-40
-20
0
20
40
60
80
100
120
-40
-20
0
20
40
60
80
100
120
Ambient Temperature (oC)
Ambient Temperature (oC)
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AS431
Document number: DS36599 Rev. 4 - 2
AS431
Performance Characteristics (Cont.)
Small Signal Voltage Gain vs. Frequency
70
60
50
40
30
20
10
0
TA=250C
IKA=10mA
-10
1k
10k
100k
1M
Small Signal Frequency (Hz)
Reference Impedance vs. Frequency
IKA=10mA
TA=25oC
10
1
0.1
1K
10K
100K
1,000K
Frequency (Hz)
Stability Boundary Conditions vs. Load Capacitance
100
90
80
70
60
50
40
30
20
10
0
Stable
Stable
TA=25oC
VKA=VREF
VKA= 5V:No oscillation
VKA=10V:No oscillation
VKA=15V:No oscillation
1
10
0.001
0.01
0.1
Load Capacitance (F)
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AS431
Document number: DS36599 Rev. 4 - 2
AS431
Performance Characteristics (Cont.)
Pulse Response of Input and Output Voltage
5
Input
4
3
Output
2
1
0
0
2
4
6
Time (S)
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AS431
Document number: DS36599 Rev. 4 - 2
AS431
Ordering Information
AS431 X X X - X
Product Name
Package
Voltage Tolerance
Packing
E1/G1
A : 0.5%
B : 1.0%
N : SOT23
K : SOT25
R : SOT89
Z : TO92
TR : Tape & Reel or
Ammo
E1 : RoHS Compliant
G1 : RoHS Compliant
and Green
(Ammo Packing)
RoHS
Voltage
Tolerance
Package
(Note 7)
Compliant
Lead Free /
Green
Status
Part Number
Marking ID
Packing
Quantity
Alternative
(Note 6)
AS431ANTR-
E1
AS431ANTR
Pb
0.5%
1.0%
0.5%
1.0%
0.5%
1.0%
0.5%
1.0%
0.5%
0.5%
1.0%
1.0%
0.5%
0.5%
1.0%
1.0%
SOT23
SOT23
SOT23
SOT23
SOT25
SOT25
SOT25
SOT25
TO92
Lead Free
Lead Free
Green
EB5
EB6
GB5
GB6
E6H
E6I
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
Bulk
3000
3000
3000
3000
3000
3000
3000
3000
1000
2000
1000
2000
1000
2000
1000
2000
NRND
-G1
Lead-Free
AS431BNTR-
E1
AS431BNTR
Pb
Lead-Free
NRND
-G1
AS431ANTR-
G1
In
—
Production
AS431BNTR-
G1
In
—
Green
Production
AS431AKTR-
E1
AS431AKTR
Pb
Lead-Free
Lead Free
Lead Free
Green
NRND
-G1
AS431BKTR-
E1
AS431BKTR
Pb
Lead-Free
NRND
-G1
AS431AKTR-
G1
In
—
G6H
G6I
Production
AS431BKTR-
G1
In
—
Green
Production
AS431AZ-
E1
AS431AZTR
Pb
Lead-Free
AS431AZ-E1
Lead Free
Lead Free
Lead Free
Lead Free
Green
End of Life
-E1
AS431AZTR-
E1
AS431AZ-
E1
In
—
Pb
Lead-Free
TO92
Ammo
Production
AS431BZ-
E1
AS431BZTR
Pb
Lead-Free
AS431BZ-E1
TO92
Bulk
End of Life
-E1
AS431BZTR-
E1
AS431BZ-
E1
In
—
Pb
Lead-Free
TO92
Ammo
Production
AS431AZ-
G1
AS431AZTR
AS431AZ-G1
TO92
Bulk
End of Life
-G1
AS431AZTR-
G1
AS431AZ-
G1
In
—
TO92
Green
Ammo
Production
AS431BZ-
G1
AS431BZTR
AS431BZ-G1
TO92
Green
Bulk
End of Life
-G1
AS431BZTR-
G1
AS431BZ-
G1
In
—
TO92
Green
Ammo
Production
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© Diodes Incorporated
AS431
Document number: DS36599 Rev. 4 - 2
AS431
Ordering Information (Cont.)
RoHS
Compliant
Lead Free /
Green
Voltage
Part Number
Package
(Note 7)
Status
Marking ID
Packing
Quantity
Alternative
Tolerance
(Note 6)
AS431ARTR-
AS431ARTR
-G1
Pb
0.5%
1.0%
0.5%
1.0%
SOT89
SOT89
SOT89
SOT89
Lead Free
Lead Free
Green
E43G
E43H
G43G
G43H
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
1000
1000
1000
1000
NRND
NRND
E1
Lead-Free
AS431BRTR-
E1
AS431BRTR
-G1
Pb
Lead-Free
AS431ARTR-
G1
In
—
—
Production
AS431BRTR-
G1
In
Green
Production
Notes:
6. All variants with TO92 package in Bulk packing (AS431AZ-E1, AS431BZ-E1, AS431AZ-G1 and AS431BZ-G1) are End of Life, recommended
alternatives are the variants with the same package in Ammo packing.
NRND: Not Recommended for New Design.
7. For packaging details, go to our website at: https://www.diodes.com/design/support/packaging/diodes-packaging/.
Marking Information
(1) TO92 (Ammo Packing)
(Front View)
First and Second Lines: Logo and Marking ID
(See Ordering Information)
Third Line: Date Code
AS431
XZ-XX
Y: Year
WW: Work Week of Molding
A: Assembly House Code
XX: Internal Code
YWWAXX
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AS431
Document number: DS36599 Rev. 4 - 2
AS431
Marking Information (Cont.)
(2) SOT23
(Top View)
3
XXX
1
: Logo
XXX: Marking ID (See Ordering Information)
2
(3) SOT89
(Top View)
First Line: Logo and Marking ID
(See Ordering Information)
Second Line: Date Code
Y: Year
WW: Work Week of Molding
A: Assembly House Code
XX: Internal Code
XXXX
YWWAXX
XXXX
YWWAXX
1
2
3
1
2
3
(4) SOT25
(Top View)
: Logo
XXX
XXX: Marking ID (See Ordering Information)
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AS431
Document number: DS36599 Rev. 4 - 2
AS431
Package Outline Dimensions (All dimensions in mm(inch).)
(1) Package Type: TO92 (Ammo Packing)
4.400(0.173
)
(
)
4.800 0.189
1.100(0.043
)
1.270(0.050
)
)
3.430(0.135
Typ
)
1.400(0.055
MIN
2.500(0.098
)
0.320(0.013
0.510(0.020)
)
(
)
4.000 0.157
)
0.000(0.000
13.000(0.512
)
0.380(0.015)
(
)
15.000 0.591
Φ1.600(0.063)
MAX
0.
0.
(0.015)
380
)
(0.022
550
)
2.540(0.100
Ty
p
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AS431
Document number: DS36599 Rev. 4 - 2
AS431
Package Outline Dimensions (Cont. All dimensions in mm(inch).)
(2) Package Type: SOT23
0.100(0.004) GAUGE PLANE
7.0°
R0.100(0.004)
4×
3.0 °
0.500(0.020)
0.700(0.028)
R0.100(0.004)
0.900(0.035)
1.100(0.043)
7.0°
~
0.0° 10.0°
2.0°
0.010(0.0004)
0.100(0.004)
1.050(0.041)REF
0.080(0.003)
0.180(0.007)
0.200(0.008)MIN
0.550(0.022)REF
2.800(0.110)
3.000(0.118)
1.200(0.047)
1.400(0.055)
2.300(0.091)
2.500(0.098)
0.300(0.012)
0.510(0.020)
0.890(0.035)
1.030(0.041)
1.900(0.075)REF
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AS431
Document number: DS36599 Rev. 4 - 2
AS431
Package Outline Dimensions (Cont. All dimensions in mm(inch).)
(3) Package Type: SOT25
2.820(0.111)
3.100(0.122)
0.100(0.004)
0.200(0.008)
0.200(0.008)
0.700(0.028)
REF
0.300(0.012)
0.500(0.020)
0°
8°
0.950(0.037)
TYP
1.800(0.071)
2.000(0.079)
0.000(0.000)
0.150(0.006)
0.900(0.035)
1.300(0.051)
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AS431
Document number: DS36599 Rev. 4 - 2
AS431
Package Outline Dimensions (Cont. All dimensions in mm(inch).)
(4) Package Type: SOT89
1.400(0.055)
1.600(0.063)
4.400(0.173)
4.600(0.181)
Option 1
2.300(0.091)
3.950(0.156)
2.060(0.081)REF
2.600(0.102)
4.250(0.167)
3
10
0.900(0.035)
1.200(0.047)
0.350(0.014)
0.450(0.018)
0.320(0.013)
0.320(0.013)
0.540(0.021)
0.540(0.021)
0.480(0.019)
0.620(0.024)
3.000(0.118)
TYP
3
R0.150(0.006)
10
Option 1
Option 2
1.550(0.061)REF
1.030(0.041)REF
R 0.200(0.008)
0.320(0.013)REF
45
2.630(0.104)
2.930(0.115)
1.620(0.064)REF
2.210(0.087)REF
1.620(0.064)
1.830(0.072)
1.500(0.059)
1.800(0.071)
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AS431
Document number: DS36599 Rev. 4 - 2
AS431
Suggested Pad Layout
(1) Package Type: SOT23
Grid placement courtyard
Y
G
Y
Z
X
E
Z
G
X
Y
E
Dimensions
Value
(mm)/(inch)
(mm)/(inch)
(mm)/(inch)
(mm)/(inch)
(mm)/(inch)
2.900/0.114
1.100/0.043
0.800/0.031
0.900/0.035
0.950/0.037
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AS431
Document number: DS36599 Rev. 4 - 2
AS431
Suggested Pad Layout (Cont.)
(2) Package Type: SOT25
E2
G
Z
E1
Y
X
Z
Dimensions
G
X
Y
E1
E2
(mm)/(inch)
(mm)/(inch)
(mm)/(inch)
(mm)/(inch)
(mm)/(inch)
(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
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AS431
Document number: DS36599 Rev. 4 - 2
AS431
Suggested Pad Layout (Cont.)
(3) Package Type: SOT89
X1
Z
X2
Y1
Y
X
E
Dimensi
ons
Z
X
X1
X2
Y
Y1
E
(mm)/(inch)
(mm)/(inch)
(mm)/(inch)
(mm)/(inch)
(mm)/(inch)
(mm)/(inch)
(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
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Document number: DS36599 Rev. 4 - 2
AS431
IMPORTANT NOTICE
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.
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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.
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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
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
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