CHAMP CM431DCS Low voltage adjustable shunt regulator Datasheet

CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
GENERAL DESCRIPTION
FEATURES
The CM431 is a three-terminal adjustable shunt voltage regulator
‹
Initial voltage reference accuracy of 1.0%.
with specified thermal stability and pin-to-pin compatible with the
‹
Sink current capability from 1mA to 100mA
earlier 431 series. The output voltage can be adjusted to any
‹
Typical output dynamic impedance less than 200mΩ;
value between VREF and 36V by using two external resistors. The
‹
Adjustable output voltage from VREF to 36V
CM431 offers low output impedance for improved load regulation
‹
Available in SOT-23, SOT-89, TO-92, & SOP-8
with a typical output impedance of 200mΩ.
‹
Low output noise
B
B
Because of the
‹
active output circuitry, the CM431 can replace the zener diodes in
B
B
Typical equivalent full range temperature coefficient of
30ppm/ OC
applications such as switching power supplies, OVP crowbar
P
P
APPLICATIONS
circuits, references for A/D, D/A converters with improved turn-on
characteristics.
‹
Voltage Reference
‹
Precision shunt regulator
‹
High current shunt regulator
‹
PWM down converter with reference
‹
Voltage monitor
PIN CONFIGURATION
TO-92
Front View
SOT-23-3
Top View
CATHODE
ANODE
REF
3
1
1
2
CM431XCM2R3
Pin 1
REF
CATHODE
Pin 2
CATHODE
REF
Pin 3
ANODE
ANODE
Suffix “X”: Grade “A”, “B”, “C”, or “D”
2
3
SOT-23-5
SOT-89
Top View
Top View
2
Rev.1.4
2
CATHODE
ANODE
REF
CATHODE REF
NC
NC
1
1
SOP-8
Top View
4
ANODE
5
2006/10/11
CM431XCM233
1
CATHODE
REF
8
2
NC
NC
7
3
NC
ANODE
6
4
NC
NC
5
3
3
Champion Microelectronic Corporation
Page 1
CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
TYPICAL APPLICATION
BLOCK DIAGRAM
VO = 5V
B
V+
B
CATHODE
Rb
B
B
R1
27.5K
0.1%
Note: Rb should
provide cathode
current ≥ 1mA
B
B
+
REF
R2
27.5K
0.1%
VREF
B
B
ANODE
5V Precision Regulator
ORDERING INFORMATION
PACKAGE
TOLERANCE
0.5%
0.7%
1.0%
T/R Quantity
SOT-23(1)
CM431ACM233
CM431DCM233
CM431BCM233
TR=3K
SOT-23(1)
CM431ACM2R3
CM431DCM2R3
CM431BCM2R3
TR=3K
SOT-89(1)
CM431ACM89
CM431DCM89
CM431BCM89
TR=1K
TO-92(2)
CM431ACN
CM431DCN
CM431BCN
TA=2K
SOP-8
CM431ACS
CM431DCS
CM431BCS
CM431GACM233*
CM431GDCM233*
CM431GBCM233*
TR=3K
SOT-23(1)
CM431GACM2R3*
CM431GDCM2R3*
CM431GBCM2R3*
TR=3K
SOT-89(1)
CM431GACM89*
CM431GDCM89*
CM431GBCM89*
TR=1K
TO-92(2)
CM431GACN*
CM431GDCN*
CM431GBCN*
TA=2K
SOP-8
CM431GACS*
CM431GDCS*
CM431GBCS*
P
P
P
P
P
P
P
P
(1)
SOT-23
P
P
P
P
P
P
P
P
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)
-0.3V to 37V
Continuous Cathode Current (IK)
-100mA to 150mA
B
B
B
B
Reference Input Current (IREF)
B
-50uA to 10mA
B
150 OC
Maximum junction temperature range, TJ
B
B
P
P
O
Storage temperature range
-65 C to 150OC
Lead temperature (soldiering, 10 seconds)
260 OC
P
P
P
P
P
P
Note 1:
Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground.
Note 2:
Voltage values are with respect to the anode terminal unless otherwise noted.
Currents are positive into, negative out of the specified terminal.
POWER DISSIPATION TABLE
θJA
O
( C/W )
O
Derating factor ( mW/ C )
TA≧25 OC
O
TA≦25 C
Power rating(mW)
TA=70 OC
Power rating(mW)
TA= 85 OC
Power rating (mW)
SOP-8
165
6.06
757
485
394
TO-92
156
6.41
801
513
417
SOT-89
71(note)
14.1
1763
1128
916
Package
B
P
B
P
B
P
B
P
B
P
P
B
P
P
B
B
P
P
B
SOT-23
285
3.5
438
280
Note :
1. For SOT-89 package, Thermal Resistance-Junction to Tab ( θJT ) = 35 OC/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.
B
B
B
B
B
B
B
B
B
B
B
B
P
P
B
B
B
B
B
B
B
B
P
P
228
B
B
B
B
B
B
B
RECOMMENDED OPERATING CONDITIONS
Operating free air temperature range, TA
B
Cathode current, IK
B
B
B
Cathode voltage, VKA
B
2006/10/11
Rev.1.4
B
Champion Microelectronic Corporation
Min
Max
Units
0
105
1
100
mA
0
36
V
O
P
C
P
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.
B
Parameter
Symbol
VREF
B
B
CM431
Test Conditions
Min
2.482
2.495
2.507
V
2.495
2.512
V
2.470
2.495
2.520
V
4
17
mV
-1.4
-2.7
mV/V
2
4
μA
B
B
B
B
B
B
B
B
B
B
B
B
B
B
IK = 10mA, VKA = VREF, 0 C ≤ TA ≤ 70 C
O
B
B
B
B
B
B
IREF
B
B
P
B
B
P
P
B
IMIN
Off-State Cathode Current
IOFF
B
B
B
B
|ZKA |
B
B
B
B
B
B
B
P
P
O
B
B
P
B
VKA = 36V, VREF = 0V
B
B
B
B
B
B
B
2.3
P
B
VKA = VREF, IK = 1mA to 100mA,
B
B
B
B
VKA = VREF
B
B
B
IK = 10mA,VKA = VREF, 0 C ≤ TA ≤ 70 C
Minimum Operating Current
B
B
O
B
B
Dynamic Impedance
B
IK = 10mA,VKA = VREF
B
Reference Input Current
B
O
P
IK = 10mA, VKA = 2.5V to 36V
(note 4)
Units
2.478
B
B
B
Voltage Ratio, Ref to Cathode
Max
IK = 10mA, VKA = VREF ,0.7%
IK = 10mA, VKA = VREF ,1.0%
Reference Drift
Typ
IK = 10mA, VKA = VREF ,0.5%
B
Reference Input Voltage
B
0.4
1
mA
0.1
1
μA
0.2
0.5
Ω
B
f ≤ 1kHz
Note 3: These parameters are guaranteed by design
VREF
B
Note 4:
B
VKA
B
2006/10/11
Ratio of change in reference input voltage to the change in cathode voltage
B
Rev.1.4
Champion Microelectronic Corporation
Page 4
CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
PARAMETER MEASUREMENT INFORMATION
Input
VKA
B
B
Input
VKA
B
R1
IREF
B
B
B
R2
VRE
B
EF
B
B
(1 + R1/R2) + IREF x R1
B
B
Figure 2. Test Circuit for VKA > VREF
Figure 1. Test Circuit for VKA = VREF
B
B
B
B
Input
B
B
B
VKA
B
B
IOFF
B
B
Figure 3. Test Circuit for IOFF
B
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
IKA-Cathode Current (mA)
90
80
70
60
50
40
30
20
10
0
0.001
2006/10/11
Rev.1.4
0.01
0.1
1
C L -Load Capacitance(uF)
10
Champion Microelectronic Corporation
Page 6
CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
APPLICATION INFORMATION
R*
VBATT
B
VO
B
B
R1
0.1%
VREF
B
VBATT
B
B
B
CM431
VO
CM431
B
B
Von ≈ 2V
Voff ≈ VBATT
Input
R2
0.1%
B
B
B
B
B
B
B
Vth = 2.5V
B
B
GND
VO = (1 + R1/R2) × VREF
B
B
B
Note: R should provide 1mA cathode current to the
CM431 of minimum VBATT
B
Figure 5. Single –Supply Comparator With Temperature
compensated threshold.
Figure 4. Shunt Regulator
VBATT
B
VO
B
B
B
VO
VBATT
B
B
B
B
R1
R1
CM431
R2
C
R2
CM431
VO = (1 + R1/R2) × VREF
B
B
B
Figure 6. High-Current Shunt Regulator
2006/10/11
Rev.1.4
Figure 7. Crowbar Circuit
Champion Microelectronic Corporation
Page 7
CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
APPLICATION INFORMATION (continued)
VBATT
B
VBATT
VO = 5V/1.5A
B
LM317
B
B
B
IO =
VREF/RS
B
B
B
B
B
B
Adjust
8.2KΩ
243Ω
0.1%
CM431
CM431
RS
0.1%
243Ω
0.1%
B
Figure 8.Precision 5V, 1.5A Regulator
VBATT
B
B
Figure 9. Precision Constant Current Sink
RCL
0.1%
IN
B
B
B
OUT
78L05
VO
B
Common
VBATT
B
B
IO
B
B
B
B
R1
R1
CM431
R2
CM431
IOUT = (VREF/RCL) + IKA
B
B
B
B
B
B
B
R1 = VBATT/((IO/hFE) + IKA)
B
VO = (1 + R1/R2) × VREF
B
B
B
B
B
B
B
B
B
B
Min VO = VREF + 5V
B
B
B
B
Figure 10. Output Control of a Three-Terminal
Fixed Regulator
2006/10/11
Rev.1.4
Figure 11. Precision Current Limiter
Champion Microelectronic Corporation
Page 8
CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
3-Pin Plastic TO-92 Package Dimension
INCHES
MIN
B
TYP
MILLIMETERS
MAX
MIN
TYP
MAX
A
0.175 0.180 0.205
4.45
4.57
5.21
B
0.170 0.180 0.210
4.32
4.57
5.33
C 0.125 0.142 0.165
3.18
3.62
4.19
K
A
G
F
C
F
-
0.015
-
-
0.38
-
G
-
0.050
-
-
1.27
-
J
-
0.150
-
-
3.81
-
0.500 0.580
-
12.70 14.73
-
K
N
M
-
5º
-
-
5º
-
N
-
5º
-
-
5º
-
3-Pin Plastic TO-92 Carrier Dimensions
P
P1
INCHES
MIN
TYP
MAX
MIN
TYP
MAX
-
-
2.00
-
-
0.480 0.500 0.520
12.2
12.7
13.2
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
W 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
Wo 0.224 0.236 0.248
5.7
6.0
6.3
W1 0.335 0.354 0.374
8.5
9.0
9.5
C
C 0.079
Ho
W1
P
Wo
W
F1
Do
Po
Fo
MILLIMETERS
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
MIN
D
C
L
MIN
TYP
MAX
0.039 0.043 0.051
1.00
1.10
1.30
0.004
0.00
-
0.10
A2 0.028 0.032 0.035
0.70
0.80
0.90
0.014 0.016 0.020
0.35
0.40
0.50
C 0.004 0.005 0.010
0.10
0.15
0.25
D 0.106 0.114 0.122
2.70
2.90
3.10
E
0.055 0.063 0.071
1.40
1.60
1.80
e
0.075 TYP.
A1 0.000
H
E
MAX
A
TYP
MILLIMETERS
b
-
M
e
A
A2
A1
b
1.90 TYP.
H 0.102 0.110 0.118
2.60
2.80
3.00
L
0.015
-
-
0.37
-
-
M
1°
5°
9°
1°
5°
9°
Surface Mount SOT-23 Carrier Dimensions
A
B
MILLIMETERS
M
E
D
A
4.0 ± 0.1
M
1.5 ± 0.1
B
2.0 ± 0.05
N
1.1 ± 0.1
C
4.0± 0.1
D
2.5 ± 0.05
E
1.75 ± 0.1
F
6.0 ± 0.2
F
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
L
5°
H
E
φ1.0
C
e
e1
A
8°
L
b
b1
C
D
D1
H
E
e1
b
b1
e
b
8-Pin Plastic S.O.I.C.
PIN 1 ID
θ
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
T E L : +886-3-5679979
F A X : +886-3-5679909
2006/10/11
Rev.1.4
Sales & Marketing
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Taiwan , R.O.C.
T E L : +886-2-2788 0558
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T
T
T
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Page 12
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