BCD AZ431LARE1 Low voltage (1.24v) adjustable precision shunt regulator Datasheet

Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
General Description
Features
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%.
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 55µA to 100
mA
Low Output Noise
Wide Operating Range of -40 to 125oC
Applications
These ICs are available in 4 packages: TO-92, SOT23-3, SOT-23-5, SOT-89.
SOT-23-5
AZ431L
·
·
·
·
·
SOT-23-3
Graphic Card
PC Motherboard
Voltage Adapter
Switching Power Supply
Charger
TO-92
SOT-89
Figure 1. Package Types of AZ431L
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
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Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Pin Configuration
Z Package
(TO-92)
K Package
(SOT-23-5)
N Package
(SOT-23-3)
R Package
(SOT-89)
ANODE
3
CATHODE
2
ANODE
1
REF
NC
1
NC
2
CATHODE
3
3
1
2
REF
5
ANODE
1
4
2
3
REF
CATHODE
REF
ANODE CATHODE
Figure 2. Pin Configuration of AZ431L (Top View)
Functional Block Diagram
CATHODE
+
REF
-
VREF
ANODE
Figure 3. Functional Block Diagram of AZ431L
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
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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
Temperature Range
Voltage
Tolerance
0.50%
TO-92
SOT-23-3
SOT-23-5
SOT-89
-40 to 125oC
-40 to 125oC
-40 to 125oC
-40 to 125oC
0.50%
Package
Z: TO-92
N: SOT-23-3
K: SOT-23-5
R: SOT-89
Part Number
Tin Lead
Lead Free
Marking ID
Tin Lead
Lead Free
Packing
Type
AZ431LAZ
AZ431LAZ-E1
AZ431LAZ
AZ431LAZ-E1
Bulk
AZ431LAZTR
AZ431LAZTR-E1
AZ431LAZ
AZ431LAZ-E1
Ammo
1%
AZ431LBZ
AZ431LBZ-E1
AZ431LBZ
AZ431LBZ-E1
Bulk
1%
AZ431LBZTR
AZ431LBZTR-E1
AZ431LBZ
AZ431LBZ-E1
0.50%
AZ431LANTR
AZ431LANTR-E1
N46
EA6
Ammo
Tape & Reel
1%
AZ431LBNTR
AZ431LBNTR-E1
N47
EA7
Tape & Reel
0.50%
AZ431LAKTR
AZ431LAKTR-E1
K41
E5A
Tape & Reel
1%
AZ431LBKTR
AZ431LBKTR-E1
K42
E6A
Tape & Reel
0.50%
AZ431LARTR
AZ431LARTR-E1
R41A
E41A
Tape & Reel
1%
AZ431LBRTR
AZ431LBRTR-E1
R41B
E41B
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. 2
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Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
Value
Unit
Cathode Voltage
VKA
20
V
Cathode Current Range (Continuous)
IKA
-100 to 100
mA
Reference Input Current Range
IREF
10
mA
Power Dissipation
PD
Z,R Package
770
N,K Package
370
TSTG
Storage Temperature Range
QJA
Package Thermal Impedance
mW
oC
-65 to 150
TO-92
130
SOT-23-3
330
SOT-23-5
250
SOT-89
100
oC/W
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
Unit
Cathode Voltage
VKA
VREF
18
V
Cathode Current
IKA
0.1
100
mA
-40
125
Operating Ambient Temperature Range
o
C
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
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Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Electrical Characteristics
(Typical and limits apply for TJ=25oC unless otherwise noted.)
Test
Symbol
Circuit
Parameter
Reference Voltage
0.5%
1%
Deviation of Reference Voltage
Over-Temperature
4
VREF
4
∆VREF
5
Reference Input Current
5
IREF
Deviation of Reference Current
Over Full Temperature Range
5
∆IREF
Minimum Cathode Current for
Regulation
4
IKA
(MIN)
Off-State Cathode Current
6
IKA
(OFF)
4
Min
Typ
Max
1.234
1.240
1.246
1.228
1.240
1.252
2
10
3
10
-0.5
-1.5
0.15
0.4
TA=-40 to 85oC
0.1
0.4
VKA=VREF
55
80
VREF=0, VKA=18V
0.04
0.10
VKA=6, VREF=0
0.01
0.05
VKA=VREF, IKA=1 to 100mA
f ≤ 1.0kHz
0.05
0.15
VKA=VREF, IKA=10mA
VKA=VREF
IKA=10mA
0oC to 70oC
oC
-40
to
85oC
∆VREF IKA=10mA,
∆VKA ∆VKA:VREF to 16V
Ratio of Change in VREF to the
Change in Cathode Voltage
Dynamic Impedance
Conditions
ZKA
IKA=10mA, R1=10KΩ, R2=∞
IKA=10mA, R1=10KΩ, R2=∞
Unit
V
mV
mV/V
µA
µA
µA
µA
Ω
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
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Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
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. 2
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Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Typical Performance Characteristics
1.242
Reference Current (µA)
Reference Voltage (V)
0.18
VKA=VREF
IKA=10mA
1.241
1.240
1.239
1.238
1.237
0.16
0.15
0.14
0.13
1.236
1.235
-50
R2=∞
IKA=10mA
R1=10KΩ
0.17
-25
0
25
50
75
100
125
0.12
-50
150
-25
0
25
50
75
100
125
o
Ambient Temperature ( C)
o
Ambient Temperature ( C)
Figure 7. Reference Voltage vs. Ambient Temperature
Figure 8. Reference Current vs. Ambient Temperature
400
150
VKA=VREF
VKA=VREF
300
o
100
o
TA=25 C
TA=25 C
Cathode Current (µA)
Cathode Current (mA)
200
50
0
-50
100
0
-100
-200
-100
-300
-150
-1
0
-1
1
0
1
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. 2
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Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Typical Performance Characteristics (Continued)
Output
60
6.8K
IKA=10mA
Voltage Gain (dB)
50
I KA
360
o
TA=25 C
10uF
40
30
20
4.3K
5V
10
0
100
1k
10k
100k
GND
500K
Small Signal Frequency (HZ)
Figure 11. Small Signal Voltage Gain vs. Frequency
10
Output
Impedance (Ω)
100Ω
1
IKA = 1mA to 100mA
IKA
50Ω
0.1
0.01
1k
GND
10k
100k
1M
Frequency (Hz)
Figure 12. Dynamic Impedance vs. Frequency
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
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Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Typical Performance Characteristics (Continued)
Input and output voltage (V)
3
Input
Output
R1
1.8KΩ
2
Pulse
Generator
f=100KHz
1
R2
50Ω
Output
GND
0
-1
0
1
2
3
4
5
6
Time (µS)
Figure 13. Pulse Response of Input and Output Voltage
-0.30
IKA=10mA
∆VKA=VREF to 16V.
Ratio of ∆VREF to ∆VKA (mV/V)
-0.35
-0.40
-0.45
-0.50
-0.55
-40
-20
0
20
40
60
80
100
120
o
Ambient Temperature ( C)
Figure 14. Ratio of Delta Reference Voltage to the Ratio of
Cathode Voltage vs. Ambient Temperature
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
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Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Typical ApplicationS
R3
V OUT
VIN
R1
VO=(1+R1/R2) VREF
V REF
AZ431L
R2
Figure 15. Shunt Regulator
VIN
VOUT
R1
R4
R2
VO=(1+R2/R3) VREF
VREF
AZ431L
AZ432
R3
Figure 16. High Current Shunt Regulator
R2
VIN
IOUT
IOUT = VREF/R2 + IKA
R1
AZ431L
Figure17. Current Source or Current Limit
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
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Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Typical Application (Continued)
VIN
AZ1117
2.5V/1A
R1
8.2K
R2
250
AZ431L
R3
250
Figure18. Precision 5-V 1.5A Regulator
R3
C1
R4
VOUT
R2 680
R5
R1
Q1
3
COMP
C2
U2
2
AZ431L
PWM Controller
VFB
4
PS521
Figure 19. PWM Converter with Reference
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
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Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
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. 2
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Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
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. 2
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Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
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. 2
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Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
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. 2
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IMPORTANT NOTICE
BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for
use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any
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.
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