BCD AZ432 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.
·
·
·
·
·
·
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 0.1mA to 100
mA
Low Output Noise
Wide Operating Range of -40 to 125oC
The AZ432 precision reference is offered in two voltage tolerance: 0.5% and 1.0%.
Applications
These ICs are available in 4 packages: TO-92 (bulk or
ammo packing), SOT-23, SOT-23-5, SOT-89-3.
TO-92
·
·
·
·
·
Graphic Card
PC Motherboard
Voltage Adapter
Switching Power Supply
Charger
SOT-89-3
TO-92 Ammo Packing
SOT-23
SOT-23-5
Figure 1. Package Types of AZ432
Mar. 2007 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
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Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Pin Configuration
N Package
(SOT-23)
Z Package
(TO-92 Ammo Packing)
Z Package
(TO-92)
ANODE
3
CATHODE
2
ANODE
1
REF
3
CATHODE
2
ANODE
1
REF
3
1
REF
1
NC
2
CATHODE
3
5
ANODE
1
4
CATHODE
R Package
(SOT-89-3)
K Package
(SOT-23-5)
NC
2
2
3
REF
REF
ANODE CATHODE
Figure 2. Pin Configuration of AZ432 (Top View)
Functional Block Diagram
CATHODE
+
REF
-
VREF
ANODE
Figure 3. Functional Block Diagram of AZ432
Mar. 2007 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
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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: 1.0%
Package
TO-92
Temperature Range
-40 to 125oC
SOT-23
-40 to 125oC
SOT-23-5
-40 to 125oC
SOT-89-3
-40 to 125oC
Voltage
Tolerance
Z: TO-92
N: SOT-23
K: SOT-23-5
R: SOT-89-3
Part Number
Tin Lead
Lead Free
Marking ID
Tin Lead
Lead Free
Packing
Type
0.5%
AZ432AZ
AZ432AZ-E1
AZ432AZ
AZ432AZ-E1
Bulk
0.5%
AZ432AZTR
AZ432AZTR-E1
AZ432AZ
AZ432AZ-E1
Ammo
1.0%
AZ432BZ
AZ432BZ-E1
AZ432BZ
AZ432BZ-E1
Bulk
1.0%
AZ432BZTR
AZ432BZTR-E1
AZ432BZ
AZ432BZ-E1
Ammo
0.5%
AZ432ANTR-E1
EA8
Tape & Reel
1.0%
AZ432BNTR-E1
EA9
Tape & Reel
0.5%
AZ432AKTR
AZ432AKTR-E1
K43
E7A
Tape & Reel
1.0%
AZ432BKTR
AZ432BKTR-E1
K44
E8A
Tape & Reel
0.5%
AZ432ARTR
AZ432ARTR-E1
R42A
E42A
Tape & Reel
1.0%
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.
Mar. 2007 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
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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
Z, R Package
770
N, K Package
370
PD
Power Dissipation
mW
TJ
Junction Temperature
TSTG
Storage Temperature Range
oC
150
oC
-65 to 150
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
Operating Ambient Temperature Range
Mar. 2007 Rev. 1. 6
o
C
BCD Semiconductor Manufacturing Limited
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Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Electrical Characteristics
(Typical and limits apply for TA=25oC, unless otherwise noted.)
Parameter
Reference Voltage
0.5%
1.0%
Test
Circuit
Symbol
4
VREF
VKA=VREF, IKA=10mA
∆VREF
VKA=VREF
IKA=10mA
Conditions
Min
4
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
Unit
1.244
1.250
1.256
1.250
1.262
2
10
3
10
4
15
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 125oC
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
-40 to 85oC
-40 to 125
Ratio of Change in VREF to the
Change in Cathode Voltage
Max
1.238
0 to 70oC
Deviation of Reference Voltage
Over Full Temperature Range
Typ
oC
IKA=10mA, R1=10KΩ, R2=∞
Mar. 2007 Rev. 1. 6
V
mV
µA
Ω
BCD Semiconductor Manufacturing Limited
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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
Mar. 2007 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
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Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Typical Performance Characteristics
1.253
0.18
0.17
Reference Current (µA)
Reference Voltage (V)
IKA=10mA
1.251
1.250
1.249
1.248
1.247
-50
R1=10KΩ
R2=Infinite
IKA=10mA
VKA=VREF
1.252
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 7. Reference Voltage vs. Ambient Temperature
Figure 8. Reference Current vs. Ambient Temperature
400
150
VKA=VREF
VKA=VREF
300
o
TA=25 C
o
TA=25 C
Cathode Current (µA)
Cathode Current (mA)
100
50
0
-50
200
100
0
-100
-200
-100
-300
-150
-1
0
-1.0
1
-0.5
0.0
0.5
1.0
1.5
Cathode Voltage (V)
Cathode Voltage (V)
Figure 10. Cathode Current vs. Cathode Voltage
Figure 9. Cathode Current vs. Cathode Voltage
Mar. 2007 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
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Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Typical Performance Characteristics (Continued)
Output
70
0
6.8K
TA=25 C
60
I KA
IKA=10mA
360
Voltage Gain (dB)
50
10µF
40
30
20
4.3K
10
0
-10
1k
10k
100k
GND
Small Signal Frequency (Hz)
Figure 11. Small Signal Voltage Gain vs. Frequency
10
Output
100Ω
Impedance (Ω)
IKA
1
50Ω
0.1
GND
0.01
1k
10k
100k
1M
Frequency (Hz)
Figure 12. Dynamic Impedance vs. Frequency
Mar. 2007 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
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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
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
-0.3
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
Mar. 2007 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
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Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Typical ApplicationS
R3
V OUT
VIN
R1
VOUT=(1+R1/R2)*VREF
V REF
AZ432
R2
Figure 15. Shunt Regulator
VIN
VOUT
R1
R4
R2
VOUT=(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
Mar. 2007 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
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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
Mar. 2007 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
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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
4.700(0.185)
0.380(0.015)
0.550(0.022)
14.100(0.555)
14.500(0.571)
4.300(0.169)
4.400(0.173)
4.700(0.185)
1.270(0.050)
TYP
2.440(0.096)
2.640(0.104)
Mar. 2007 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
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Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Mechanical Dimensions (Continued)
TO-92 Ammo Packing
12.400(0.488)
13.000(0.512)
Unit: mm(inch)
±1.000(0.039)
±1.000(0.039)
4.400(0.173)
4.600(0.181)
ΔP
Δh
3.400(0.134)
3.600(0.142)
4.400(0.173)
4.600(0.181)
19.000(0.748)
21.000(0.827)
0.380(0.015)
0.550(0.022)
2.200(0.087)
2.800(0.110)
1.000 (0.039) MAX
15.500(0.610)
16.500(0.650)
5.500(0.217)
6.500(0.256)
2.500(0.098)
MIN
3.800(0.150)
4.200(0.165)
17.500(0.689)
19.000(0.748)
2.200(0.087)
2.800(0.110)
6.050(0.238)
6.650(0.262)
8.500(0.335)
9.500(0.374)
3.550(0.140)
4.150(0.163)
12.500(0.492)
12.900(0.508)
0.150(0.006)
0.250(0.010)
0.350(0.014)
0.450(0.018)
Mar. 2007 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
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Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Mechanical Dimensions (Continued)
SOT-23
Mar. 2007 Rev. 1. 6
Unit: mm(inch)
BCD Semiconductor Manufacturing Limited
14
Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
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)
1.250(0.049)
1.050(0.041)
0.950(0.037)
TYP
0.000(0.000)
0.100(0.004)
1.050(0.041)
1.150(0.045)
Mar. 2007 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
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Data Sheet
LOW VOLTAGE (1.25V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ432
Mechanical Dimensions (Continued)
SOT-89-3
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)
0.520(0.020)
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)
Mar. 2007 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
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