BCD AZ432BN Low voltage (1.25v) adjustable precision shunt regulator Datasheet

Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
General Description
Features
The AZ432 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.
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·
·
·
·
·
The output voltage can be set to any value between
1.25V and 18V with two external resistors.
·
·
AZ432
Wide Programmable Precise Output Voltage from
1.25V 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
The AZ432 precision reference is offered in two bandgap tolerance: 0.5% and 1%.
Applications
These ICs are available in 4 packages: TO-92, SOT23-3, SOT-23-5, SOT-89.
SOT-23-5
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·
·
·
·
SOT-23-3
Graphic Card
PC Motherboard
Voltage Adapter
Switching Power Supply
Charger
TO-92
SOT-89
Figure 1. Package Types of AZ432
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
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Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
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
3
1
1
NC
1
NC
2
5
ANODE
1
2
REF
CATHODE
3
4
2
3
REF
REF
ANODE CATHODE
CATHODE
REF
Figure 2. Pin Configuration of AZ432 (Top View)
Functional Block Diagram
CATHODE
+
REF
-
VREF
ANODE
Figure 3. Functional Block Diagram of AZ432
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
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Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Ordering Information
AZ432
E1: Lead Free
Circuit Type
Blank: Tin Lead
TR: Tape and Reel or Ammo
Blank: Tube or Bulk
Package
Bandage Tolerance
A: 0.5%
B: 1%
Package
TO-92
Temperature Range
-40 to 125oC
SOT-23-3
-40 to 125oC
SOT-23-5
-40 to 125oC
SOT-89
-40 to 125oC
Voltage
Tolerance
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
0.50%
AZ432AZ
AZ432AZ-E1
AZ432AZ
AZ432AZ-E1
Bulk
0.50%
AZ432AZTR
AZ432AZTR-E1
AZ432AZ
AZ432AZ-E1
Ammo
1%
AZ432BZ
AZ432BZ-E1
AZ432BZ
AZ432BZ-E1
Bulk
1%
AZ432BZTR
AZ432BZTR-E1
AZ432BZ
AZ432BZ-E1
Ammo
0.50%
AZ432ANTR
AZ432ANTR-E1
N48
EA8
Tape & Reel
1%
AZ432BNTR
AZ432BNTR-E1
N49
EA9
Tape & Reel
0.50%
AZ432AKTR
AZ432AKTR-E1
K43
E7A
Tape & Reel
1%
AZ432BKTR
AZ432BKTR-E1
K44
E8A
Tape & Reel
0.50%
AZ432ARTR
AZ432ARTR-E1
R42A
E42A
Tape & Reel
1%
AZ432BRTR
AZ432BRTR-E1
R42B
E42B
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 (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
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
oC
-65 to 150
QJA
Package Thermal Impedance
mW
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 Operation Ratings
Parameter
Symbol
Min
Max
Unit
Cathode Voltage
VKA
VREF
18
V
Cathode Current
IKA
0.1
100
mA
-40
125
oC
Operating Ambient Temperature Range
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
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Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Electrical Characteristics
(Typical and limits apply for TJ=25oC unless otherwise noted.)
Parameter
Reference Voltage
0.5%
1%
Deviation of Reference Voltage Over-Temperature
Test
Circuit
Symbol
4
VREF
4
∆VREF
VKA=VREF
IKA=10mA
Ratio of Change in VREF to the
Change in Cathode Voltage
5
∆VREF
∆VKA
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)
Dynamic Impedance
4
ZKA
Conditions
Min
Typ
Max
1.244
1.250
1.256
1.238
1.250
1.262
0 to 70oC
2
10
-40 to 85oC
3
10
IKA=10mA,
∆VKA: VREF to 16V
-0.5
-1.5
mV/V
IKA=10mA, R1=10KΩ, R2=∞
0.15
0.4
µA
TA=-40 to 85oC
0.1
0.4
µA
VKA=VREF
55
80
µA
VREF=0, VKA=18V
0.04
0.10
VKA=6V, VREF=0
0.01
0.05
VKA=VREF, IKA=1 to 100mA
f≤1.0kHz
0.05
0.15
VKA=VREF, IKA=10mA
IKA=10mA, R1=10KΩ, R2=∞
Unit
V
mV
µA
Ω
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
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Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
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 (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Typical Performance Characteristics
1.253
0.18
VKA=VREF
IKA=10mA
Reference Current (µA)
Reference Voltage (V)
1.252
1.251
1.250
1.249
1.248
1.247
-50
R2=∞
IKA=10mA
R1=10KΩ
0.17
0.16
0.15
0.14
0.13
-25
0
25
50
75
100
125
0.12
-50
150
-25
o
0
25
50
75
100
o
Ambient Temperature ( C)
Ambient Temperature ( C)
Figure 8. Reference Current vs. Ambient Temperature
Figure 7. Reference Voltage 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
Cathode Voltage (V)
-0.5
0.0
0.5
1.0
1.5
Cathode Voltage (V)
Figure 10. Current vs. cathode Voltage
Figure 9. Cathode Current vs. Cathode Voltage
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
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Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Typical Performance Characteristics (Continued)
Output
6.8K
60
Voltage Gain (dB)
360
IKA=10mA
50
I KA
10µF
o
TA=25 C
40
30
4.3K
20
10
0
100
1k
10k
100k
GND
500K
Small Signal Frequency (HZ)
Figure 11. Small Signal Voltage Gain vs. Frequency
10
Impedance (Ω)
Output
100Ω
1
IKA
50Ω
0.1
0.01
1k
10k
100k
GND
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 (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Typical Performance Characteristics (Continued)
Input and output voltage (V)
3
Input
Output
2
R1
1.8KΩ
1
Pulse
Generator
f=100KHz
Output
R2
50Ω
GND
0
-1
0
1
2
3
4
5
6
Time (µS)
Figure 13. Pulse Response of Input and Output Voltage
-0.3
Ratio of ∆VREF to ∆VKA (mV/V)
IKA=10mA
∆VKA=VREF to 16V.
-0.4
-0.5
-40
0
40
80
120
o
Ambient Temperature ( C)
Figure 14. Ratio of Delta Reference Voltage to the Ratio of Delta
Cathode Voltage vs. Ambient Temperature
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
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Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Typical ApplicationS
R3
V OUT
VIN
R1
VO=(1+R1/R2) VREF
V REF
AZ432
R2
Figure 15: Shunt Regulator
VIN
VOUT
R1
R4
R2
VO=(1+R2/R3) VREF
VREF
AZ432
R3
Figure 16: High Current Shunt Regulator
R2
VIN
IOUT
R1
IOUT = VREF/R2 + IKA
AZ432
Figure17: Current Source or Current Limit
BCD Semiconductor Manufacturing Limited
Apr. 2005 Rev. 1. 2
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Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Typical Application (Continued)
VIN
AZ1117
2.5V/1A
R1
8.2K
R2
250
AZ432
R3
250
Figure18: Precision 2.5V/1A Regulator
R3
C1
R4
VOUT
R2 680
R5
R1
Q1
3
COMP
C2
U2
2
AZ432
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 (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
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 (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
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 (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
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 (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
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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