BCDSEMI AZ431

Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
General Description
Features
The AZ431 series ICs are three-terminal adjustable
shunt 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 and other adjustable regulators.
·
The AZ431 series ICs contain two voltage types,
AZ431-A for 40V and AZ431-B for 20V. The output
voltage of both types can be set to any value between
VREF(2.5V) and the corresponding maximum cathode
voltage.
·
·
·
·
The AZ431 precision reference is offered in two bandgap tolerance: 0.4% and 0.8%.
These ICs are available in 5 Packages: TO-92, SOT-233, SOT-23-5, SOT-89 and SOIC-8.
SOIC-8
·
·
·
·
AZ431
Programmable Precise Output Voltage from 2.5V
to 36V or 18V
Very Accurate Reference Voltage: 0.15% Typical
High Stability under Capacitive Load
Low Temperature Deviation: 4.5mV Typical
Low Equivalent Full-range Temperature Coefficient with 20PPM/oC Typical
Low Dynamic Output Resistance: 0.2Ω Typical
Sink Current Capacity from 1mA to 100 mA
Low Output Noise
Wide Operating Range of -40 to 125oC
Applications
·
·
·
·
·
Charger
Voltage Adapter
Switching Power Supply
Graphic Card
Precision Voltage Reference
SOT-89
TO-92
SOT-23-5
SOT-23-3
Figure 1. Package Types of AZ431
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
Pin Configuration
R Package
(SOT-89)
N Package
(SOT-23-3)
M Package
(SOIC-8)
ANODE
CATHODE
1
8
REF
ANODE
2
7
ANODE
ANODE
3
6
ANODE
NC
4
5
NC
3
1
2
1
REF
CATHODE
REF
2
3
ANODE CATHODE
K Package
(SOT-23-5)
Z Package
(TO-92)
3
CATHODE
NC
1
2
ANODE
NC
2
1
REF
CATHODE
3
5
ANODE
4
REF
Figure 2. Pin Configuration of AZ431 (Top View)
Functional Block Diagram
CATHODE
+
REF
-
VREF
ANODE
Figure 3. Functional Block Diagram of AZ431
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
Ordering Information
AZ431
E1: Lead-Free
Circuit Type
Blank: Tin Lead
TR: Tape and Reel or Ammo
Bandage Tolerance
A: 0.4%
B: 0.8%
Blank: Tube or Bulk
A: AZ431(40V)
B: AZ431(20V)
Package
M: SOIC-8
N: SOT-23-3
R: SOT-89
Z: TO-92
K: SOT-23-5
40V Products
Package
Temperature Range
SOT-23-3
-40 to 125oC
o
SOT-23-5
TO-92
-40 to 125 C
-40 to 125oC
o
SOIC-8
SOT-89
-40 to 125 C
-40 to 125oC
Voltage
Tolerance
0.4%
Part Number
Tin Lead
Lead Free
Marking ID
Tin Lead
Lead Free
Packing
Type
AZ431AN-ATR
AZ431AN-ATRE1
N41
EA1
Tape & Reel
0.8%
AZ431BN-ATR
AZ431BN-ATRE1
N42
EA2
Tape & Reel
0.4%
AZ431AK-ATR
AZ431AK-ATRE1
K3A
E3A
Tape & Reel
0.8%
AZ431BK-ATR
AZ431BK-ATRE1
K3B
E3B
Tape & Reel
0.4%
AZ431AZ-A
AZ431AZ-AE1
AZ431AZ-A
AZ431AZ-AE1
Bulk
0.4%
AZ431AZ-ATR
AZ431AZ-ATRE1
AZ431AZ-A
AZ431AZ-AE1
Ammo
0.8%
AZ431BZ-A
AZ431BZ-AE1
AZ431BZ-A
AZ431BZ-AE1
Bulk
0.8%
AZ431BZ-ATR
AZ431BZ-ATRE1
AZ431BZ-A
AZ431BZ-AE1
Ammo
0.4%
AZ431AM-A
AZ431AM-AE1
AZ431AM-A
AZ431AM-AE1
Tube
0.4%
AZ431AM-ATR
AZ431AM-ATRE1
AZ431AM-A
AZ431AM-AE1
Tape & Reel
0.8%
AZ431BM-A
AZ431BM-AE1
AZ431BM-A
AZ431BM-AE1
Tube
0.8%
AZ431BM-ATR
AZ431BM-ATRE1
AZ431BM-A
AZ431BM-AE1
Tape & Reel
0.4%
AZ431AR-ATR
AZ431AR-ATRE1
431A
E43A
Tape & Reel
0.8%
AZ431BR-ATR
AZ431BR-ATRE1
431B
E43B
Tape & Reel
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
Ordering Information (Continued)
20V Products
Package
Temperature Range
SOT-23-3
-40 to 125oC
o
SOT-23-5
TO-92
SOIC-8
SOT-89
-40 to 125 C
-40 to 125oC
-40 to 125oC
-40 to 125oC
Part Number
Marking ID
Packing
Type
Voltage
Tolerance
Tin Lead
Lead Free
0.4%
AZ431AN-BTR
AZ431AN-BTRE1
N44
EA4
Tape & Reel
0.8%
AZ431BN-BTR
AZ431BN-BTRE1
N45
EA5
Tape & Reel
0.4%
AZ431AK-BTR
AZ431AK-BTRE1
K4A
E4A
Tape & Reel
0.8%
AZ431BK-BTR
AZ431BK-BTRE1
K4B
E4B
Tape & Reel
0.4%
AZ431AZ-B
AZ431AZ-BE1
AZ431AZ-B
AZ431AZ-BE1
Bulk
Tin Lead
Lead Free
0.4%
AZ431AZ-BTR
AZ431AZ-BTRE1
AZ431AZ-B
AZ431AZ-BE1
Ammo
0.8%
AZ431BZ-B
AZ431BZ-BE1
AZ431BZ-B
AZ431BZ-BE1
Bulk
0.8%
AZ431BZ-BTR
AZ431BZ-BTRE1
AZ431BZ-B
AZ431BZ-BE1
Ammo
0.4%
AZ431AM-B
AZ431AM-BE1
AZ431AM-B
AZ431AM-BE1
Tube
0.4%
AZ431AM-BTR
AZ431AM-BTRE1
AZ431AM-B
AZ431AM-BE1
Tape & Reel
0.8%
AZ431BM-B
AZ431BM-BE1
AZ431BM-B
AZ431BM-BE1
Tube
0.8%
AZ431BM-BTR
AZ431BM-BTRE1
AZ431BM-B
AZ431BM-BE1
Tape & Reel
0.4%
AZ431AR-BTR
AZ431AR-BTRE1
431C
E43C
Tape & Reel
0.8%
AZ431BR-BTR
AZ431BR-BTRE1
431D
E43D
Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
Value
Unit
AZ431 (40V): 40
VKA
Cathode Voltage
V
AZ431 (20V): 20
Cathode Current Range (Continuous)
IKA
-100 to +150
mA
Reference Input Current Range
IREF
10
mA
M,Z,R Package: 770
PD
Power Dissipation
TJ
Junction Temperature
TSTG
Storage Temperature Range
mW
N,K Package: 370
160
oC
-65 to +150
oC
M Package: 150
N Package: 330
θJA
Package Thermal Impedance
Z Package: 150
oC/W
R Package: 50
K Package: 250
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 Maximum
Ratings" for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter
Symbol
Min
Max
AZ431(40V): 36
Unit
Cathode Voltage
VKA
VREF
Cathode Current
IKA
1.0
100
mA
-40
125
oC
Operating Ambient
Temperature Range
AZ431(20V): 18
V
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
Electrical Characteristics for AZ431(40V)
Operating Conditions: TA=25oC unless otherwise specified.
Parameter
Reference Voltage
0.4%
0.8%
Deviation of Reference
Voltage Over-Temperature
Test
Circuit
Symbol
4
VREF
4
∆VREF
Conditions
AZ431 (40V)
Min
Typ
Max
2.490
2.500
2.510
2.480
2.500
2.520
0 to 70oC
4.5
8
-40 to 85oC
4.5
10
∆ VKA=
10V to VREF
-1.0
-2.7
∆VKA=
36V to 10V
-0.5
-2.0
0.7
4
R2=∞, TA=-40 to 85oC
0.4
1.2
VKA=VREF, IKA=10mA
VKA=VREF
IKA= 10mA
5
Reference Current
5
IREF
Deviation of Reference Current
Over Full Temperature Range
5
∆IREF
Minimum Cathode Current for
Regulation
4
IKA
(MIN)
VKA=VREF
0.4
1.0
Off-State Cathode Current
6
IKA
(OFF)
VKA=36 V, VREF=0
0.05
1.0
Dynamic Impedance
4
ZKA
VKA=VREF, IKA=1 to 100mA,
f ≤ 1.0KHz
0.15
0.5
IKA=10mA
IKA=10mA,R1=10KΩ, R2=∞
IKA=10mA, R1=10KΩ
V
mV
Ratio of Change in Reference
Voltage to the Change in
Cathode Voltage
∆VREF
∆VKA
Unit
mV/V
µA
µA
mA
µA
Ω
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
Electrical Characteristics for AZ431(20V)
Operating Conditions: TA=25oC unless otherwise specified.
Parameter
Reference Voltage
0.4%
0.8%
Deviation of Reference Voltage
Over-Temperature
Test
Circuit
Symbol
4
VREF
4
∆VREF
AZ431 (20V)
Conditions
VKA=VREF, IKA=10mA
0 to 70oC
Min
Typ
Max
2.490
2.500 2.510
2.480
2.500 2.520
V
4.5
8
4.5
10
∆ VKA=
10V to VREF
-1.0
-2.7
∆VKA=
18V to 10V
-0.5
-2.0
0.7
4
µA
TA=-40 to 85oC
0.4
1.2
µA
mA
VKA=VREF
IKA=10mA
-40 to 85
oC
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
∆IREF
Minimum Cathode Current for
Regulation
4
IKA
(MIN)
VKA=VREF
0.4
1.0
Off-State Cathode Current
6
IKA
(OFF)
VKA=18V, VREF=0
0.05
1.0
Dynamic Impedance
4
ZKA
VKA=VREF, IKA=1 to 100mA
f ≤ 1.0KHz
0.2
0.5
∆VREF
∆VKA
Unit
IKA=10mA
IKA=10mA, R1=10KΩ, R2=∞
IKA=10mA, R1=10KΩ,R2=∞
mV/V
µA
Ω
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
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
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
Typical Performance Characteristics
1.5
2.510
Reference Voltage (V)
Reference Current (µA)
VKA = VREF
IKA = 10mA
2.505
2.500
2.495
R1=10K,R2=Infinite
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
o
0
20
40
60
80
100
120
140
Ambient Temperature ( C)
Figure 7. Reference Voltage vs. Ambient Temperature
Figure 8. Reference Current vs. Ambient Temperature
800
150
VKA=VREF
100
Cathode Current (µA)
Cathode Current (mA)
-20
0
Ambient Temperature ( C)
0
TA=25 C
50
0
VKA=VREF
600
0
TA=25 C
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. Current vs. Cathode Voltage
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
Typical Performance Characteristics (Continued)
2.0
AZ431-20V: VKA=3.5V to 18V
AZ431-40V: VKA=3.5V to 36V
-0.9
1.6
AZ431-20V:VKA=18V
AZ431-40V:VKA=36V
VREF=0
1.4
1.2
∆VREF / ∆VKA (mV/V)
Off-State Cathode Current (µA)
1.8
1.0
0.8
0.6
0.4
-1.0
-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
1K
60
10K
100K
1000K
60
15K
I KA
242
50
50
o
TA = 25 C
IKA = 10mA
Av (dB)
40
40
30
30
20
20
10
10
0
1K
10uF
8.2K
GND
0
10K
100K
1000K
Small Signal Frequency
Figure 13. Small Signal Voltage Gain vs. Frequency
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
Reference Impedance (Ω)
Typical Performance Characteristics (Continued)
IKA=10mA
Output
o
TA=25 C
10
1K
IKA
50
1
0.1
1K
GND
10K
100K
1000K
Frequency (Hz)
Figure 14. Reference Impedance vs. Frequency
100
Cathode Current (mA)
90
80
70
A:
VKA=5V
VKA=10V
B:
VKA=15V: No oscillation
150
R1 (10K)
IKA
60
50
40
30
A
R2
20
10
B
0
0.01uF
0.1uF
1uF
2uF
Load Capacitance
Figure 15. Stability Boundary Conditions vs. Load Capacitance
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
Typical Performance Characteristics (Continued)
5
Input and Output Voltage (V)
Input
Output
4
220
Pulse
Generator
f=100KHz
3
Output
2
50
1
GND
0
0
2
4
6
Time (µS)
Figure 16. Pulse Response of Input and Output Voltage
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
Typical Application
R3
V OUT
VIN
R1
VO=(1+R1/R2) VREF
V REF
AZ431
R2
Figure 17. Shunt Regulator
VIN
VOUT
R1
R4
VO=(1+R2/R3)*VREF
R2
VREF
AZ431
R3
Figure 18. High Current Shunt Regulator
R2
V IN
Iout
IOUT = VREF/R2 + IKA
R1
AZ431
Figure19. Current Source or Current Limit
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
Typical Application (Continued)
VIN
AZ1117
R1
8.2K
VOUT
Adjust
5V, 1.5A
R2
250
AZ431
R3
250
Figure20. Precision 5V 1.5A Regulator
R3
C1
R4
VOUT
R2 680
R5
R1
U2
Q1
3
COMP
C2
2
AZ431
PWM Controller
VFB
4
PS521
Figure 21. PWM Converter with Reference
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
Mechanical Dimensions
TO-92
Unit: mm (inch)
1.100(0.043)
3.430(0.135)
MIN
3.700(0.146)
3.300(0.130)
1.400(0.055)
0.360(0.014)
0.510(0.020)
0.000(0.000)
0.380(0.015)
Φ1.600(0.063)
MAX
4.400(0.173)
4.700(0.185)
1.270(0.050)
TYP
14.500(0.571)
0.380(0.015)
0.550(0.022)
14.100(0.555)
4.300(0.169)
4.700(0.185)
2.440(0.096)
2.640(0.104)
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
Mechanical Dimensions (Continued)
SOT-23-3
3.0 °
7.0°
R0.100(0.004)
0.900(0.035)
1.100(0.043)
7.0°
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)
0.080(0.003)
0.150(0.006)
0.550(0.022)REF
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)
2.0°
1.050(0.041)REF
Unit: mm(inch)
0.390(0.015)
0.450(0.018)
1.900(0.075)REF
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
Mechanical Dimensions (Continued)
SOT-23-5
Unit: mm(inch)
1.500(0.059)
1.700(0.067)
0.300(0.012)
0.600(0.024)
0.080(0.003)
0.220(0.009)
2.900(0.114)
2.700(0.106)
2.800(0.110)
3.000(0.118)
0.200(0.008)
0.300(0.012)
4°
4°
0.925(0.036)
0.975(0.038)
R0.100(0.004)
R0.200(0.008)
R0.100(0.004)
0.300(0.012)
0.500(0.020)
1.450(0.057)
0.950(0.037)
5°
15°
0.010(0.0004)
0.150(0.006)
0.650(0.026)
5°
15°
1.050(0.041)
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
Mechanical Dimensions (Continued)
SOT-89
Unit: mm(inch)
4.400(0.173)
4.600(0.181)
1.630(0.064)
1.400(0.055)
1.600(0.063)
1.830(0.072)
0.000(0.000)
0.076(0.003)
1.400(0.055)*
1.200(0.047)
0.900(0.035)
3.950(0.156)
4.250(0.167)
R0.200(0.008)
2.300(0.091)
2.600(0.102)
3°
10°
0.360(0.014)
0.360(0.014)
0.360(0.014)
0.480(0.019)
0.480(0.019)
0.440(0.017)
0.440(0.017)
3.000(0.118)
0.560(0.022)
3°
10°
R0.150(0.006)
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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Data Sheet
ADJUSTABLE PRECISION SHUNT REGULATORS
AZ431
Mechanical Dimensions (Continued)
SOIC-8
Unit: mm(inch)
4.800(0.189)
5.000(0.197)
7°
0.320(0.013)
1.350(0.053)
1.750(0.069)
8°
8°
7°
0.675(0.027)
0.725(0.029)
D
5.800(0.228)
1.270(0.050)
6.200(0.244)
TYP
D
20:1
0.300(0.012)
R0.150(0.006)
0.100(0.004)
φ 0.800(0.031)
0.200(0.008)
0°
8°
1.000(0.039)
3.800(0.150)
4.000(0.157)
1°
5°
0.330(0.013)
0.510(0.020)
0.900(0.035)
R0.150(0.006)
0.190(0.007)
0.250(0.010)
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 7
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liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others.