CM431BCN [CHAMP]
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR; 低电压可调并联稳压器
| 型号： | CM431BCN |
| 厂家： | 
CHAMPION MICROELECTRONIC CORP. |
| 描述： | LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR |
| 文件： | 总12页 (文件大小：215K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
GENERAL DESCRIPTION
FEATURES
The CM431 is a three-terminal adjustable shunt voltage regulator
with specified thermal stability and pin-to-pin compatible with the
earlier 431 series. The output voltage can be adjusted to any
value between VREF and 36V by using two external resistors. The
CM431 offers low output impedance for improved load regulation
with a typical output impedance of 200mΩ. Because of the
active output circuitry, the CM431 can replace the zener diodes in
applications such as switching power supplies, OVP crowbar
circuits, references for A/D, D/A converters with improved turn-on
characteristics.
Initial voltage reference accuracy of 1.0%.
Sink current capability from 1mA to 100mA
Typical output dynamic impedance less than 200mΩ;
Adjustable output voltage from VREF to 36V
Available in SOT-23, SOT-89, TO-92, & SOP-8
Low output noise
Typical equivalent full range temperature coefficient of
30ppm/OC
APPLICATIONS
Voltage Reference
Precision shunt regulator
High current shunt regulator
PWM down converter with reference
Voltage monitor
PIN CONFIGURATION
TO-92
SOT-23-3
Front View
Top View
3
CM431XCM233
REF
CM431XCM2R3
CATHODE
REF
Pin 1
Pin 2
Pin 3
CATHODE
ANODE
ANODE
Suffix “X”: Grade “A”, “B”, “C”, or “D”
2
1
2
3
1
SOT-23-5
Top View
SOT-89
SOP-8
Top View
Top View
5
4
1
2
3
4
REF
8
7
6
5
CATHODE
NC
ANODE
NC
NC
NC
NC
2
3
1
1
2
3
2006/10/11 Rev.1.4
Champion Microelectronic Corporation
Page 1
CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
TYPICAL APPLICATION
BLOCK DIAGRAM
VO = 5V
V+
CATHODE
Rb
R1
27.5K
0.1%
+
REF
Note: Rb should
provide cathode
current ≥ 1mA
-
R2
27.5K
0.1%
VREF
ANODE
5V Precision Regulator
ORDERING INFORMATION
PACKAGE
TOLERANCE
0.5%
0.7%
1.0%
T/R Quantity
TR=3K
SOT-23（1）
SOT-23（1）
SOT-89（1）
TO-92（2）
SOP-8
CM431ACM233
CM431ACM2R3
CM431ACM89
CM431ACN
CM431DCM233
CM431DCM2R3
CM431DCM89
CM431DCN
CM431BCM233
CM431BCM2R3
CM431BCM89
CM431BCN
TR=3K
TR=1K
TA=2K
CM431ACS
CM431DCS
CM431BCS
SOT-23（1）
SOT-23（1）
SOT-89（1）
TO-92（2）
SOP-8
CM431GACM233*
CM431GACM2R3*
CM431GACM89*
CM431GACN*
CM431GACS*
CM431GDCM233*
CM431GDCM2R3*
CM431GDCM89*
CM431GDCN*
CM431GDCS*
CM431GBCM233*
CM431GBCM2R3*
CM431GBCM89*
CM431GBCN*
CM431GBCS*
TR=3K
TR=3K
TR=1K
TA=2K
Notes：
（1） Add suffix ″TR″for Tape & Reel.
（2） Add suffix ″TA″for Tape Ammo.
（3） *Note: Add suffix “G” for Pb Free Product
2006/10/11 Rev.1.4
Champion Microelectronic Corporation
Page 2
CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
ABSOLUTE MAXIMUM RATINGS
Cathode to Anode Voltage (VKA) (Note 2)
Continuous Cathode Current (IK)
-0.3V to 37V
-100mA to 150mA
-50uA to 10mA
150OC
-65OC to 150OC
260OC
Reference Input Current (IREF
)
Maximum junction temperature range, TJ
Storage temperature range
Lead temperature (soldiering, 10 seconds)
Note 1: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground.
Currents are positive into, negative out of the specified terminal.
Note 2: Voltage values are with respect to the anode terminal unless otherwise noted.
POWER DISSIPATION TABLE
Package
θJA
Derating factor ( mW/OC )
TA≦25OC
TA=70OC
TA= 85OC
( OC/W )
TA≧25OC
Power rating(mW)
Power rating(mW) Power rating (mW)
SOP-8
TO-92
165
156
6.06
6.41
757
801
485
513
394
417
SOT-89
71(note)
285
14.1
3.5
1763
438
1128
280
916
228
SOT-23
Note :
1. For SOT-89 package, Thermal Resistance-Junction to Tab ( θJT ) =35OC/W. TJ = TTAB + (PD x θJT)
2.
θJA: Thermal Resistance-Junction to Ambient
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJA numbers are guidelines for the thermal performance of the device/PC-board system.
All of the above assume no ambient airflow.
RECOMMENDED OPERATING CONDITIONS
Min
Max
Units
OC
mA
V
Operating free air temperature range, TA
Cathode current, IK
0
1
0
105
100
36
Cathode voltage, VKA
2006/10/11 Rev.1.4
Champion Microelectronic Corporation
Page 3
CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over the operating ambient temperatures with TA = 25°C.
CM431
Parameter
Symbol
Test Conditions
Units
Min
Typ
2.495
2.495
2.495
4
Max
2.507
2.512
2.520
17
IK = 10mA, VKA = VREF ,0.5%
IK = 10mA, VKA = VREF ,0.7%
2.482
2.478
2.470
V
V
Reference Input Voltage
VREF
IK = 10mA, VKA = VREF ,1.0%
IK = 10mA, VKA = VREF, 0OC ≤ TA ≤ 70OC
V
Reference Drift
mV
Voltage Ratio, Ref to Cathode
(note 4)
IK = 10mA, VKA = 2.5V to 36V
-1.4
2
-2.7
mV/V
IK = 10mA,VKA = VREF
IK = 10mA,VKA = VREF, 0OC ≤ TA ≤ 70OC
VKA = VREF
4
2.3
1
Reference Input Current
IREF
μA
Minimum Operating Current
Off-State Cathode Current
IMIN
IOFF
0.4
0.1
mA
VKA = 36V, VREF = 0V
1
μA
V
KA = VREF, IK = 1mA to 100mA,
Dynamic Impedance
|ZKA
|
0.2
0.5
Ω
f ≤ 1kHz
Note 3: These parameters are guaranteed by design
VREF
Note 4:
Ratio of change in reference input voltage to the change in cathode voltage
VKA
2006/10/11 Rev.1.4
Champion Microelectronic Corporation
Page 4
CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
PARAMETER MEASUREMENT INFORMATION
Input
VKA
Input
VKA
R1
R2
IREF
VRE
EF (1 + R1/R2) + IREF x R1
Figure 2. Test Circuit for VKA > VREF
Figure 1. Test Circuit for VKA = VREF
Input
VKA
IOFF
Figure 3. Test Circuit for IOFF
2006/10/11 Rev.1.4
Champion Microelectronic Corporation
Page 5
CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
TYPICAL CHARACTERISTICS
Cathode Current vs. Cathode Voltage
Cathode Current vs. Cathode Voltage
Ref. Input Voltage vs. Free-Air Temperature
Ref. Input Current vs. Free-Air Temperature
Stability Boundray Conditions
100
90
80
70
60
50
40
30
20
10
0
0.001
0.01
0.1
1
10
CL-Load Capacitance(uF)
2006/10/11 Rev.1.4
Champion Microelectronic Corporation
Page 6
CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
APPLICATION INFORMATION
R*
VBATT
VO
VBATT
R1
0.1%
CM431
VO
CM431
VREF
Von ≈ 2V
Voff ≈ VBATT
Input
R2
0.1%
Vth = 2.5V
GND
VO = (1 + R1/R2) × VREF
Note: R should provide 1mA cathode current to the
CM431 of minimum VBATT
Figure 5. Single –Supply Comparator With Temperature
Figure 4. Shunt Regulator
compensated threshold.
VBATT
VO
VBATT
VO
R1
R2
R1
R2
CM431
C
CM431
VO = (1 + R1/R2) × VREF
Figure 7. Crowbar Circuit
Figure 6. High-Current Shunt Regulator
2006/10/11 Rev.1.4
Champion Microelectronic Corporation
Page 7
CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
APPLICATION INFORMATION (continued)
VBATT
VO = 5V/1.5A
IO =
VBATT
LM317
Adjust
VREF/RS
243Ω
0.1%
8.2KΩ
CM431
CM431
RS
0.1%
243Ω
0.1%
Figure 8.Precision 5V, 1.5A Regulator
Figure 9. Precision Constant Current Sink
VBATT
IO
RCL
0.1%
IN
OUT
VBATT
VO
78L05
Common
CM431
R1
R1
R2
CM431
IOUT = (VREF/RCL) + IKA
R1 = VBATT/((IO/hFE) + IKA)
VO = (1 + R1/R2) × VREF
Min VO = VREF + 5V
Figure 10. Output Control of a Three-Terminal
Figure 11. Precision Current Limiter
Fixed Regulator
2006/10/11 Rev.1.4
Champion Microelectronic Corporation
Page 8
CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
3-Pin Plastic TO-92 Package Dimension
INCHES
MILLIMETERS
MIN TYP MAX MIN TYP MAX
0.175 0.180 0.205 4.45 4.57 5.21
0.170 0.180 0.210 4.32 4.57 5.33
0.125 0.142 0.165 3.18 3.62 4.19
A
B
C
F
B
K
A
G
-
-
-
0.015
0.050
0.150
-
-
-
-
-
-
-
-
-
0.38
1.27
3.81
-
-
-
-
-
-
F
G
J
C
K
M
N
0.500 0.580
12.70 14.73
N
-
-
5º
5º
-
-
5º
5º
3-Pin Plastic TO-92 Carrier Dimensions
P
P1
INCHES
MILLIMETERS
MIN TYP MAX MIN TYP MAX
0.079 2.00
0.480 0.500 0.520 12.2 12.7 13.2
C
C
P
-
-
-
-
Ho
Wo
W1
Po 0.488 0.500 0.512 12.4 12.7 13.0
Do 0.150 0.157 0.165 3.8 4.0 4.2
P1 0.230 0.250 0.256 5.85 6.35 6.85
Fo 0.165 0.197 0.220 4.2 5.0 5.6
0.669 0.709 0.748 17.0 18.0 19.0
Ho 0.610 0.630 0.649 15.5 16.0 16.5
W
W
F1
Do
Po
Fo
Wo 0.224 0.236 0.248 5.7
W1 0.335 0.354 0.374 8.5
6.0
9.0
6.3
9.5
Note: For TO-92, 2,500 units per ammo
2006/10/11 Rev.1.4
Champion Microelectronic Corporation
Page 9
CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
Surface Mount SOT-23
INCHES
MILLIMETERS
MIN TYP MAX MIN TYP MAX
0.039 0.043 0.051 1.00 1.10 1.30
D
C
A
L
A1 0.000
-
0.004 0.00
-
0.10
A2 0.028 0.032 0.035 0.70 0.80 0.90
H
E
b
C
D
E
e
0.014 0.016 0.020 0.35 0.40 0.50
0.004 0.005 0.010 0.10 0.15 0.25
0.106 0.114 0.122 2.70 2.90 3.10
0.055 0.063 0.071 1.40 1.60 1.80
M
e
0.075 TYP.
1.90 TYP.
A
H
L
0.102 0.110 0.118 2.60 2.80 3.00
A2
0.015
-
-
0.37
-
-
A1
b
M
1°
5°
9°
1°
5°
9°
Surface Mount SOT-23 Carrier Dimensions
A
B
M
MILLIMETERS
E
A
M
N
4.0 ± 0.1
1.5 ± 0.1
1.1 ± 0.1
B
C
D
E
F
2.0 ± 0.05
4.0± 0.1
D
F
2.5 ± 0.05
1.75 ± 0.1
6.0 ± 0.2
N
C
DIRECTION OF FEED
2006/10/11 Rev.1.4
Champion Microelectronic Corporation
Page 10
CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
SOT-89 Package Dimension
D
D1
φ1.0
C
e
e1
A
L
b
b1
C
D
D1
H
E
e1
e
b
b
b1
8-Pin Plastic S.O.I.C.
PIN 1 ID
θ
2006/10/11 Rev.1.4
Champion Microelectronic Corporation
Page 11
CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
IMPORTANT NOTICE
Champion Microelectronic Corporation (CMC) reserves the right to make changes to its products or to
discontinue any integrated circuit product or service without notice, and advises its customers to obtain the
latest version of relevant information to verify, before placing orders, that the information being relied on is
current.
A few applications using integrated circuit products may involve potential risks of death, personal injury, or
severe property or environmental damage. CMC integrated circuit products are not designed, intended,
authorized, or warranted to be suitable for use in life-support applications, devices or systems or other
critical applications. Use of CMC products in such applications is understood to be fully at the risk of the
customer. In order to minimize risks associated with the customer’s applications, the customer should
provide adequate design and operating safeguards.
HsinChu Headquarter
5F, No. 11, Park Avenue II,
Science-Based Industrial Park,
HsinChu City, Taiwan
Sales & Marketing
7F-6, No.32, Sec. 1, Chenggong Rd.,
Nangang District, Taipei City 115,
Taiwan , R.O.C.
TEL: +886-3-5679979
T E L : +886-2-2788 0558
F A X : +886-2-2788 2985
FAX: +886-3-5679909
2006/10/11 Rev.1.4
Champion Microelectronic Corporation
Page 12
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