AZ431LAK [DIODES]
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| 型号： | AZ431LAK |
| 厂家： | 
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Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
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.
·
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 coeffi-
o
cient: 20PPM/ C typical
·
·
Low dynamic output resistance: 0.05Ω typical
High sink current capacity from 55µA to 100 mA
The output voltage can be set to any value between · Low output noise
1.24V and 18V with two external resistors.
o
·
Wide Operating Range of -40 to 125 C
The AZ431L precision reference is offered in two
bandgap tolerance: 0.5% and 1%.
Applications
·
·
·
·
·
Graphic Card
These ICs are available in 4 packages: TO-92, SOT-
23-3, SOT-23-5, SOT-89.
PC Motherboard
Voltage Adapter
Switching Power Supply
Charger
SOT-23-3
TO-92
SOT-23-5
SOT-89
Figure 1. Package Types of AZ431L
BCD Semiconductor Manufacturing Limited
Dec. 2003 Rev. 1. 0
1
Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Pin Configuration
Z Package
(TO-92)
N Package
(SOT-23-3)
K Package
(SOT-23-5)
R Package
(SOT-89)
ANODE
NC
NC
1
2
3
5
4
ANODE
REF
3
3 CATHODE
2 ANODE
1 REF
1
2
1
2
3
CATHODE
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
Dec. 2003 Rev. 1. 0
2
Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Ordering Information
Package
Temperature Range Voltage Tolerance
Part Number
AZ431LAZ
AZ431LBZ
AZ431LAN
AZ431LBN
AZ431LAK
AZ431LBK
AZ431LAR
AZ431LBR
Marking ID
AZ431LAZ
AZ431LBZ
N46
Packing Type
Bulk
0.5%
1%
0.5%
TO-92
Ammo
SOT-23-3
SOT-23-5
SOT - 89
Reel
Reel
Reel
1%
0.5%
N47
-40 to 125oC
K41
1%
0.5%
1%
K42
R41A
R41B
Some of our products are available in Lead Free packages; If buyers need Lead Free product, please add -E1 after
the part number in your order. For example, AZ358M is a standard tin-lead product, AZ358M-E1 means a Lead
Free product.
A Z 431L X Y
Circuit Type
Bandgap Tolerance
Package
Z: TO-92
A: 0.5%
B: 1%
N: SOT-23-3
K: SOT-23-5
R: SOT-89
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
Value
Unit
Cathode Voltage
V
20
V
KA
Cathode Current Range (Continuous)
Reference Input Current Range
I
I
-100 to +100
mA
mA
KA
10
REF
Z,R Package
N,K Package
770
370
Power Dissipation
P
mW
D
o
Storage Temperature Range
T
-65 to +150
STG
C
TO-92
130
330
250
100
SOT-23-3
SOT-23-5
SOT-89
o
Package Thermal Impedance
Q
JA
C/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 Maxi-
mum Ratings" for extended periods may affect device reliability.
BCD Semiconductor Manufacturing Limited
Dec. 2003 Rev. 1. 0
3
Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Recommended Operating Conditions
Parameter
Cathode Voltage
Symbol
Min
REF
Max
18
Unit
V
V
V
KA
Cathode Current
Operating Ambient Temperature Range
I
0.1
-40
100
125
mA
KA
o
C
Electrical Characteristics
o
(Typical and limits apply for T =25 C unless otherwise noted.)
J
Test
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
V
Circuit
0.5%
1%
1.234
1.228
1.240
1.240
2
1.246
1.252
10
Reference Voltage
4
VREF VKA=VREF, IKA=10mA
0oC to 70oC
-40oC to 85oC
VKA=VREF
IKA=10mA
∆ VREF
Deviation of Reference Voltage
Over-Temperature
mV
4
3
10
Ratio of Change in VREF to the
Change in Cathode Voltage
∆ VREF
∆ VKA
5
5
IKA=10mA, ∆Vz: VREF to 16V
-0.5
-1.5 mV/V
Reference Input Current
IREF IKA=10mA, R1=10KΩ, R2=∞
0.15
0.4
µ A
Deviation of Reference Current
Over Full Temperature Range
IKA=10mA, R1=10KΩ, R2=∞
∆IREF
5
4
6
4
0.1
55
0.4
80
µ A
µ A
TA=-40 to 85oC
IKA
Minimum Cathode Current for
Regulation
VKA=VREF
(MIN)
VREF=0, VKA=18V
0.04
0.01
0.10
0.05
IKA
Off-State Cathode Current
Dynamic Impedance
µ A
(OFF)
VKA=6, VREF=0
VKA=VREF, IKA=1 to 100mA
f≤1.0kHz
ZKA
0.05
0.15
Ω
BCD Semiconductor Manufacturing Limited
Dec. 2003 Rev. 1. 0
4
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
Dec. 2003 Rev. 1. 0
5
Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Typical Performance Characteristics
1.242
0.18
V
=V
IKAKA=10RmEFA
R2=∞
1.241
1.240
1.239
1.238
1.237
1.236
1.235
IKA=10mA
0.17
0.16
0.15
0.14
0.13
0.12
R1=10KΩ
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
150
Ambient Temperature (oC)
Ambient Temperature (oC)
Figure 7. Reference Voltage vs. Ambient Temperature
Figure 8. Reference Current vs. Ambient Temperature
400
150
VKA=VREF
TA=25oC
VKA=VREF
300
200
TA=25oC
100
50
0
100
0
-100
-200
-300
-50
-100
-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
Dec. 2003 Rev. 1. 0
6
Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Typical Performance Characteristics (Continued)
Output
360
I KA
60
6.8K
IKA=10mA
TA=25oC
50
40
30
20
10
0
10uF
4.3K
5V
500K
100
1k
10k
100k
GND
Small Signal Frequency (HZ)
Figure 11. Small Signal Voltage Gain vs. Frequency
10
1
Output
100Ω
IKA = 1mA to 100mA
IKA
50Ω
0.1
0.01
GND
1k
10k
100k
1M
Frequency (Hz)
Figure 12. Dynamic Impedance vs. Frequency
BCD Semiconductor Manufacturing Limited
Dec. 2003 Rev. 1. 0
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Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Typical Performance Characteristics (Continued)
3
Iutput
Output
GND
2
R1
1.8KΩ
Pulse
R2
Generator
f=100KHz
1
0
50Ω
Output
2
-1
0
1
3
4
5
6
Time (µS)
Figure 13. Pulse Response of Input and Output Voltage
-0.30
IKA=10mA
∆VKA=VREF to 16V.
-0.35
-0.40
-0.45
-0.50
-0.55
-40
-20
0
20
40
60
80
100
120
Ambient Temperature (oC)
Figure 14. Ratio of Delta Reference Voltage to the Ratio of
Cathode Voltage vs. Ambient Temperature
BCD Semiconductor Manufacturing Limited
Dec. 2003 Rev. 1. 0
8
Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Typical Applications
R3
VOUT
VIN
R1
VO=(1+R1/R2) VREF
VREF
R2
AZ431L
Figure 15. Shunt Regulator
R4
VIN
VOUT
R1
R2
VO=(1+R2/R3) VREF
VREF
R3
AZ431L
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
Dec. 2003 Rev. 1. 0
9
Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Typical Applications (Continued)
V
AZ1117
2.5V/1A
IN
R1
8.2K
R2
250
AZ431L
R3
250
Figure18. Precision 5-V 1.5A Regulator
R3
R4
C1
R1
VOUT
R2 680
R5
C2
U2
Q1
3
4
COMP
2
AZ431
PWM Controller
VFB
PS521
Figure 19. PWM Converter with Reference
BCD Semiconductor Manufacturing Limited
Dec. 2003 Rev. 1. 0
10
Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Mechanical Dimensions
TO - 92
Unit: mm
2.54
Φ1.5×0.2
Φ4.5±0.1
0.46
0.38
BCD Semiconductor Manufacturing Limited
Dec. 2003 Rev. 1. 0
11
Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Mechanical Dimensions (Continued)
Unit: mm
SOT- 23-3
0.200 MIN
0.550 REF
2.900±0.100
+0.050
0.400
-0.010
0.950±0.030
1.900 REF
BCD Semiconductor Manufacturing Limited
Dec. 2003 Rev. 1. 0
12
Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Mechanical Dimensions (Continued)
SOT - 23 - 5
Unit: mm
2.90±0.10
0.15±0.07
0.25±0.05
4°
4°
R0.15±0.05
R0.10
0.40±0.10
0.95±0.025
10°±5°
10°±5°
BCD Semiconductor Manufacturing Limited
Dec. 2003 Rev. 1. 0
13
Data Sheet
LOW VOLTAGE (1.24V) ADJUSTABLE PRECISION SHUNT REGULATOR
AZ431L
Mechanical Dimensions (Continued)
Unit: mm
SOT - 89
4.50±0.10
1.73±0.10
1.50±0.10
1.40
*
R0.20
3°
0.42
0.42±0.06
0.40±0.04
0.50±0.06
3.00
R0.15
BCD Semiconductor Manufacturing Limited
Dec. 2003 Rev. 1. 0
14
http://www.bcdsemi.com
http://www.aacmicro.com
BCD Semiconductor Corporation
860 Hillview Court, Suite 160, Milpitas, CA 95035, USA
Shanghai SIM-BCD Semiconductor manufacturing Co., Ltd.
800 Yi Shan Road, Shanghai 200233, PRC
Tel: +1-408-586 8809, Fax: +1-408-586 8802
Tel: +86-21-6485-1491, Fax: +86-21-5450-0008
Tel: +86-21-6495 9539, Fax: +86-21-6485 9673
Advanced Analog circuits (Shanghai) Corporation
8F, B Zone, 900 Yi Shan Road, Shanghai 200233, PRC
BCD Semiconductor (Taiwan) company Limited
Room 2210, 22nd Fl, 333, Keelung Road, Sec. 1, TaiPei (110), Taiwan
Tel: +886-2-2758 6828, Fax: +886-2-2758 6892
IMPORTANT NOTICE
BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any pro-
ducts 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 Limi-
ted does not convey any license under its patent rights or other rights nor the rights of others.
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