BCD AS431ANTR-E1 Adjustable precision shunt regulator Datasheet

Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AS431
General Description
Features
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.
·
The output voltage of AS431 can be set to any value
between VREF (2.5V) and the corresponding maximum
cathode voltage (36V).
The AS431 precision reference is offered in two voltage tolerance: 0.5% and 1.0%.
This IC is available in 4 packages: TO-92 (bulk or
ammo packing), SOT-23, SOT-23-5 and SOT-89.
SOT-89
·
·
·
·
·
·
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/oC Typical
Sink Current Capacity from 1mA to 100mA
Low Output Noise
Wide Operating Range of -40 to 125oC
Applications
·
·
·
·
·
Charger
Voltage Adapter
Switching Power Supply
Graphic Card
Precision Voltage Reference
TO-92(Bulk Packing)
TO-92(Ammo Packing)
SOT-23-5
SOT-23
Figure 1. Package Types of AS431
BCD Semiconductor Manufacturing Limited
Dec. 2012 Rev. 2. 6
1
Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AS431
Pin Configuration
N Package
(SOT-23)
R Package
(SOT-89)
K Package
(SOT-23-5)
ANODE
3
NC
1
*
2
CATHODE
3
(Note 1)
1
REF
1
2
2
3
5
4
ANODE
REF
REF ANODE CATHODE
CATHODE
Note 1: * Pin 2 is attached to substrate and
must be connected to ANODE or open
Z Package
(TO-92(Ammo Packing))
Z Package
(TO-92(Bulk Packing))
3
CATHODE
ANODE
2
ANODE
REF
1
REF
3
CATHODE
2
1
Figure 2. Pin Configuration of AS431 (Top View)
Functional Block Diagram
CATHODE
+
REF
-
VREF
ANODE
Figure 3. Functional Block Diagram of AS431
BCD Semiconductor Manufacturing Limited
Dec. 2012 Rev. 2. 6
2
Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AS431
Ordering Information
AS431
Circuit Type
E1: Lead Free
G1: Green
Voltage Tolerance
A: 0.5%
B: 1.0%
TR: Tape and Reel or Ammo
Blank: Bulk
Package
N: SOT-23
R: SOT-89
Package
Temperature
Range
SOT-23
-40 to 125oC
SOT-23-5
-40 to 125oC
TO-92
SOT-89
-
-40 to 125oC
-40 to 125oC
K: SOT-23-5
Z: TO-92
Voltage
Tolerance
Part Number
Lead Free
Marking ID
Green
Lead Free
Green
Packing
Type
0.5%
AS431ANTR-E1
AS431ANTR-G1
EB5
GB5
Tape & Reel
1.0%
AS431BNTR-E1
AS431BNTR-G1
EB6
GB6
Tape & Reel
0.5%
AS431AKTR-E1
AS431AKTR-G1
E6H
G6H
Tape & Reel
1.0%
AS431BKTR-E1
AS431BKTR-G1
E6I
G6I
Tape & Reel
0.5%
AS431AZ-E1
AS431AZ-G1
AS431AZ-E1
AS431AZ-G1
Bulk
0.5%
AS431AZTR-E1
AS431AZTR-G1
AS431AZ-E1
AS431AZ-G1
Ammo
1.0%
AS431BZ-E1
AS431BZ-G1
AS431BZ-E1
AS431BZ-G1
Bulk
1.0%
AS431BZTR-E1
AS431BZTR-G1
AS431BZ-E1
AS431BZ-G1
Ammo
0.5%
AS431ARTR-E1
AS431ARTR-G1
E43G
G43G
Tape & Reel
1.0%
AS431BRTR-E1
AS431BRTR-G1
E43H
G43H
Tape & Reel
BCD Semiconductor'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.
BCD Semiconductor Manufacturing Limited
Dec. 2012 Rev. 2. 6
3
Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AS431
Absolute Maximum Ratings (Note 2)
Parameter
Symbol
Value
Unit
Cathode Voltage
VKA
40
V
Cathode Current Range (Continuous)
IKA
-100 to 150
mA
Reference Input Current Range
IREF
10
mA
PD
Power Dissipation
Z, R Package: 770
mW
N, K Package: 370
TJ
150
oC
Storage Temperature Range
TSTG
-65 to 150
oC
ESD (Human Body Model)
ESD
2000
V
Junction Temperature
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
Parameter
Symbol
Min
Max
Unit
Cathode Voltage
VKA
VREF
36
V
Cathode Current
IKA
1.0
100
mA
Operating Ambient
Temperature Range
TA
-40
125
o
C
BCD Semiconductor Manufacturing Limited
Dec. 2012 Rev. 2. 6
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AS431
Electrical Characteristics
Operating Conditions: TA=25oC, unless otherwise specified.
Parameter
Reference Voltage
0.5%
1.0%
Deviation of Reference Voltage
Over Full Temperature Range
Test
Circuit
Symbol
4
VREF
4
ΔVREF
Conditions
Min
Typ
Max
2.487
2.500
2.512
2.475
2.500
2.525
4.5
8
4.5
10
-40 to 125oC
4.5
16
ΔVKA=
10V to VREF
-1.0
-2.7
ΔVKA=
36V to 10V
-0.5
-2.0
0.7
4
μA
0.4
1.2
μA
VKA=VREF, IKA=10mA
VKA=VREF
IKA= 10mA
0 to 70oC
-40 to
85oC
Unit
V
mV
Ratio of Change in Reference
Voltage to the Change in
Cathode Voltage
5
Reference Current
5
IREF
Deviation of Reference Current
Over Full Temperature Range
5
ΔIREF
Minimum Cathode Current for
Regulation
4
IKA
(Min)
VKA=VREF
0.4
1.0
mA
Off-state Cathode Current
6
IKA
(Off)
VKA=36V, VREF=0
0.05
1.0
μA
Dynamic Impedance
4
ZKA
VKA=VREF, IKA=1 to 100mA,
f ≤ 1.0KHz
0.15
0.5
Ω
SOT-23
135.9
SOT-23-5
135.9
TO-92
81.9
SOT-89
29.8
Thermal Resistance
ΔVREF
ΔVKA
θJC
IKA=10mA
IKA=10mA,R1=10KΩ, R2=∞
IKA=10mA, R1=10KΩ
R2=∞, TA=-40 to 125oC
Dec. 2012 Rev. 2. 6
mV/V
o
C/W
BCD Semiconductor Manufacturing Limited
5
Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AS431
Electrical Characteristics (Continued)
R1
VKA
VIN
IKA
VREF
Figure 4. Test Circuit 4 for VKA=VREF
R3
VIN
VKA
IKA
R1
IREF
VKA=VREF(1+R1/R2)+ IREF*R1
R2
VREF
Figure 5. Test Circuit 5 for VKA>VREF
VKA
VIN
IOFF
Figure 6. Test Circuit 6 for IOFF
BCD Semiconductor Manufacturing Limited
Dec. 2012 Rev. 2. 6
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AS431
Typical Performance Characteristics
1.5
2.510
VKA = VREF
Reference Current (μA)
Reference Voltage (V)
R1=10K,R2=Infinite
IKA = 10mA
2.505
2.500
2.495
IKA=10mA
1.0
0.5
2.490
2.485
-60
-40
-20
0
20
40
60
80
100
120
0.0
-60
140
-40
-20
0
o
60
80
100
120
140
Figure 8. Reference Current vs. Ambient Temperature
800
VKA=VREF
VKA=VREF
0
TA=25 C
0
TA=25 C
600
100
Cathode Current (μA)
Cathode Current (mA)
40
Ambient Temperature ( C)
Figure 7. Reference Voltage vs. Ambient Temperature
150
20
0
Ambient Temperature ( C)
50
0
400
200
0
-50
-200
-100
-2
-1
0
1
2
-1.0
3
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
Cathode Voltage (V)
Cathode Voltage (V)
Figure 9. Cathode Current vs. Cathode Voltage
Figure 10. Cathode Current vs. Cathode Voltage
Dec. 2012 Rev. 2. 6
BCD Semiconductor Manufacturing Limited
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AS431
Typical Performance Characteristics (Continued)
1.8
VKA=36V
1.6
VREF=0
-0.9
VKA=3.5V to 36V
-1.0
1.4
ΔVREF / ΔVKA (mV/V)
Off-State Cathode Current (μA)
2.0
1.2
1.0
0.8
0.6
0.4
-1.1
-1.2
-1.3
0.2
0.0
-1.4
-40
-20
0
20
40
60
80
100
120
-40
-20
0
20
40
60
80
100
120
o
o
Ambient Temperature ( C)
Ambient Temperature ( C)
Figure 11. Off-State Cathode Current vs.
Ambient Temperature
Figure 12. Ratio of Delta Reference Voltage to the
Ratio of Delta Cathode Voltage
Output
70
TA=25 C
I KA
242
IKA=10mA
50
Voltage Gain (dB)
15K
0
60
10μF
40
30
20
10
8.2K
0
-10
1k
10k
100k
1M
GND
Small Signal Frequency (Hz)
Figure 13. Small Signal Voltage Gain vs. Frequency
BCD Semiconductor Manufacturing Limited
Dec. 2012 Rev. 2. 6
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AS431
Typical Performance Characteristics (Continued)
Output
IKA=10mA
1K
Reference Impedance (Ω)
o
10
TA=25 C
IKA
50
1
GND
0.1
1K
10K
100K
1,000K
Frequency (Hz)
Figure 14. Reference Impedance vs. Frequency
100
90
Cathode Current (mA)
80
R1 (10K)
70
60
150
IKA
Stable
Stable
50
o
TA=25 C
40
VKA=VREF
30
VKA=10V:No oscillation
10
0
0.001
R2
VKA= 5V:No oscillation
20
VKA=15V:No oscillation
0.01
0.1
1
10
Load Capacitance (μF)
Figure 15. Stability Boundary Conditions vs. Load Capacitance
Dec. 2012 Rev. 2. 6
BCD Semiconductor Manufacturing Limited
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AS431
Typical Performance Characteristics (Continued)
5
Input and Output Voltage (V)
Input
Output
4
220
Pulse
Generator
f=100KHz
3
Output
2
50
1
0
GND
0
2
4
6
Time (μS)
Figure 16. Pulse Response of Input and Output Voltage
BCD Semiconductor Manufacturing Limited
Dec. 2012 Rev. 2. 6
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AS431
Typical Application
R3
V OUT
VIN
R1
VOUT=(1+R1/R2)*VREF
V REF
AS431
R2
Figure 17. Shunt Regulator
VIN
R1
VOUT
R4
VOUT=(1+R2/R3)*VREF
R2
VREF
AS431
R3
Figure 18. High Current Shunt Regulator
R2
V IN
I OUT
IOUT=VREF/R2 + IKA
R1
AS431
Figure 19. Current Source or Current Limit
Dec. 2012 Rev. 2. 6
BCD Semiconductor Manufacturing Limited
11
Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AS431
Typical Application (Continued)
VIN
VOUT
AZ1117
R1
8.2K
Adjust
R2
250
5V, 1A
AS431
R3
250
Figure 20. Precision 5V 1A Regulator
R3
C1
R4
VOUT
R2 680
R5
R1
U2
Q1
3
COMP
C2
2
AS431
PWM Controller
VFB
4
PS521
Figure 21. PWM Converter with Reference
BCD Semiconductor Manufacturing Limited
Dec. 2012 Rev. 2. 6
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AS431
Mechanical Dimensions
TO-92(Bulk Packing)
Unit: mm(inch)
1.000(0. 039)
3.430(0. 135)
MIN
3.700(0.146)
3.300(0.130)
1.400(0. 055)
0.320(0. 013)
0.510(0. 020)
0. 000(0. 000)
0. 380(0. 015)
Φ1. 600(0. 063)
MAX
4.700(0.185)
1.270(0. 050)
TYP
15.500(0.610)
0.360(0. 014)
0.760(0. 030)
12.500(0.492)
4.300(0.169)
4.400(0. 173)
4.800(0. 189)
2.420(0.095)
2.660(0.105)
Dec. 2012 Rev. 2. 6
BCD Semiconductor Manufacturing Limited
13
Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AS431
Mechanical Dimensions (Continued)
TO-92(Ammo Packing)
Unit: mm(inch)
1. 100(0. 043)
3. 430(0.135)
MIN
1.270(0.050)
Typ
2.500(0.098)
4.000 (0.157 )
0. 000(0.000)
0. 380(0.015)
Φ1. 600(0. 063)
MAX
14.500(0.571)
12.500(0.492)
0.320(0. 013)
0. 510(0. 020)
3.800(0.150)
3.300(0.130)
1. 400(0.055)
4.700(0.185)
4.300(0.169)
4.400(0.173)
4.800 (0.189 )
13.000(0. 512)
15.000 (0.591 )
Φ
0.380(0.015)
0.550(0.022 )
2.540(0.100)
Typ
BCD Semiconductor Manufacturing Limited
Dec. 2012 Rev. 2. 6
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AS431
Mechanical Dimensions (Continued)
SOT-23
3.0 °
2.0°
1.050(0.041)REF
7.0°
R0.100(0.004)
0.900(0.035)
1.100(0.043)
0.0°~10.0°
0.020(0.001)
0.100(0.004) 0.200(0.008)MIN
2.800(0.110)
3.000(0.118)
0.550(0.022)REF
7.0°
0.080(0.003)
0.150(0.006)
1.200(0.047)
1.400(0.055)
2.300(0.091)
2.500(0.098)
0.920(0.036)
0.980(0.039)
0.100(0.004) GAUGE PLANE
4×R0.100(0.004)
0.500(0.020)
0.700(0.028)
Unit: mm(inch)
0.300(0.012)
0.500(0.020)
1.900(0.075)REF
Dec. 2012 Rev. 2. 6
BCD Semiconductor Manufacturing Limited
15
Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AS431
Mechanical Dimensions (Continued)
SOT-23-5
Unit: mm(inch)
0.300(0.012)
0.600(0.024)
1.500(0.059)
1.700(0.067)
0.100(0.004)
0.200(0.008)
2.950(0.116)
2.650(0.104)
2.820(0.111)
3.020(0.119)
0.200(0.008)
0.700(0.028)
REF
0.300(0.012)
0.400(0.016)
0°
8°
1.800(0.071)
2.000(0.079)
0.000(0.000)
MAX
1.450(0.057)
0.950(0.037)
TYP
0.150(0.006)
0.900(0.035)
1.300(0.051)
BCD Semiconductor Manufacturing Limited
Dec. 2012 Rev. 2. 6
16
Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AS431
Mechanical Dimensions (Continued)
SOT-89
1.550(0.061)REF
Unit: mm(inch)
4.400(0.173)
4.600(0.181)
1.400(0.055)
1.600(0.063)
1.030(0.041)REF
45
2.300(0.091)
2.600(0.102)
3.950(0.156)
4.250(0.167)
2.060(0.081)REF
3
0.900(0.035)
1.100(0.043)
0.320(0.013)
0.520(0.020)
0.480(0.019)
0.320(0.013)
0.520(0.020)
10
0.350(0.014)
0.450(0.018)
3.000(0.118)
TYP
1.500(0.059)
1.800(0.071)
0.320(0.013)REF
3
2.210(0.087)REF
1.620(0.064)REF
R0.150(0.006)
10
Dec. 2012 Rev. 2. 6
BCD Semiconductor Manufacturing Limited
17
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