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Datasheet> All Categories > Power/power management> The power supply circuit> CM431ACNTA
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CM431ACNTA

Description
Regulator
CategoryPower/power management    The power supply circuit   
File Size215KB，12 Pages
ManufacturerChampion Microelectronic Corp.
Power control management IC chips are the primary key to improving the power saving performance of electronic facilities and products. Backed by the most advanced technology in Silicon Valley, U.S., Hongguan Electronics has invested in AC-DC analog power IC professional design for many years, and has always adhered to the concept of implementing energy conservation and carbon reduction, striving for a green world, so that energy saving and power saving performance can be fully realized in people's lives around the world.
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CM431ACNTA Overview

Regulator

CM431ACNTA Parametric

Parameter NameAttribute value
MakerChampion Microelectronic Corp.
package instruction,
Reach Compliance Codeunknown

CM431ACNTA Preview

CM431
L
OW
V
OLTAGE
A
DJUSTABLE
S
HUNT
R
EGULATOR
GENERAL DESCRIPTION
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 V
REF
and 36V by using two external resistors. The
B
B
FEATURES
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 V
REF
to 36V
B
B
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.
Available in SOT-23, SOT-89, TO-92, & SOP-8
Low output noise
Typical equivalent full range temperature coefficient of
30ppm/
O
C
P
P
APPLICATIONS
Voltage Reference
Precision shunt regulator
High current shunt regulator
PWM down converter with reference
Voltage monitor
PIN CONFIGURATION
TO-92
Front View
CATHODE
SOT-23-3
Top View
3
REF
ANODE
CM431XCM233
Pin 1
Pin 2
Pin 3
1
2
CM431XCM2R3
CATHODE
REF
ANODE
REF
CATHODE
ANODE
Suffix “X”: Grade “A”, “B”, “C”, or “D”
1
2
3
SOT-23-5
Top View
5
4
SOT-89
Top View
1
SOP-8
Top View
C OE
ATH D
N
C
N
C
N
C
R
EF
N
C
AN D
OE
N
C
8
7
6
5
CATHODE REF
CATHODE
ANODE
REF
ANODE
2
3
4
NC
NC
1
2
3
1
2
3
2006/10/11
Rev.1.4
Champion Microelectronic Corporation
Page 1
CM431
L
OW
V
OLTAGE
A
DJUSTABLE
S
HUNT
R
EGULATOR
TYPICAL APPLICATION
V+
R
b
B
B
BLOCK DIAGRAM
V
O
= 5V
B
B
CATHODE
Note: R
b
should
provide cathode
current
≥
1mA
B
B
R1
27.5K
0.1%
R2
27.5K
0.1%
REF
+
-
V
REF
B
B
5V Precision Regulator
ANODE
ORDERING INFORMATION
PACKAGE
0.5%
SOT-23
（
1
）
P
P
TOLERANCE
0.7%
CM431DCM233
CM431DCM2R3
CM431DCM89
CM431DCN
CM431DCS
CM431GDCM233*
CM431GDCM2R3*
CM431GDCM89*
CM431GDCN*
CM431GDCS*
1.0%
CM431BCM233
CM431BCM2R3
CM431BCM89
CM431BCN
CM431BCS
CM431GBCM233*
CM431GBCM2R3*
CM431GBCM89*
CM431GBCN*
CM431GBCS*
TR=3K
TR=3K
TR=1K
TA=2K
T/R Quantity
TR=3K
TR=3K
TR=1K
TA=2K
CM431ACM233
CM431ACM2R3
P
SOT-23
（
1
）
P
SOT-89
（
1
）
P
P
CM431ACM89
CM431ACN
TO-92
（
2
）
P
P
SOP-8
SOT-23
P
CM431ACS
（
1
）
P
CM431GACM233*
CM431GACM2R3*
P
SOT-23
（
1
）
P
SOT-89
（
1
）
P
P
CM431GACM89*
CM431GACN*
TO-92
（
2
）
P
P
SOP-8
Notes：
CM431GACS*
（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
L
OW
V
OLTAGE
A
DJUSTABLE
S
HUNT
R
EGULATOR
ABSOLUTE MAXIMUM RATINGS
Cathode to Anode Voltage (V
KA
) (Note 2)
B
B
-0.3V to 37V
-100mA to 150mA
-50uA to 10mA
150
O
C
B
P
P
Continuous Cathode Current (I
K
)
B
B
Reference Input Current (I
REF
)
B
B
Maximum junction temperature range, T
J
B
Storage temperature range
Lead temperature (soldiering, 10 seconds)
Note 1:
Note 2:
Currents are positive into, negative out of the specified terminal.
Voltage values are with respect to the anode terminal unless otherwise noted.
-65 C to 150
O
C
P
P
P
P
O
260 C
P
P
O
Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground.
POWER DISSIPATION TABLE
Package
SOP-8
TO-92
SOT-89
θ
JA
O
( C/W )
B
B
P
P
O
Derating factor ( mW/ C )
T
A
≧
25
O
C
P
P
B
B
P
P
O
T
A
≦
25 C
Power rating(mW)
B
B
P
P
T
A
=70
O
C
Power rating(mW)
B
B
P
P
T
A
= 85
O
C
Power rating (mW)
B
B
P
P
165
156
71(note)
6.06
6.41
14.1
757
801
1763
485
513
1128
394
417
916
228
SOT-23
285
3.5
438
280
Note :
1. For SOT-89 package, Thermal Resistance-Junction to Tab (
θ
JT
) = 35
O
C/W. T
J
= T
TAB
+ (P
D
x
θ
JT
)
2.
θ
JA
:
Thermal Resistance-Junction to Ambient
Junction Temperature Calculation: T
J
= T
A
+ (P
D
x
θ
JA
).
The
θ
JA
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
P
P
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
RECOMMENDED OPERATING CONDITIONS
Min
Operating free air temperature range, T
A
B
B
Max
105
Units
O
P
P
0
1
0
C
Cathode current, I
K
B
B
100
36
mA
V
Cathode voltage, V
KA
B
B
2006/10/11
Rev.1.4
Champion Microelectronic Corporation
Page 3
CM431
L
OW
V
OLTAGE
A
DJUSTABLE
S
HUNT
R
EGULATOR
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over the operating ambient temperatures with T
A
= 25°C.
B
B
Parameter
Symbol
B
B
Test Conditions
I
K
= 10mA, V
KA
= V
REF
,0.5%
B
B
B
B
CM431
Min
2.482
2.478
2.470
O
B
B
P
P
Typ
2.495
2.495
2.495
4
-1.4
2
Max
2.507
2.512
2.520
17
-2.7
4
2.3
1
1
0.5
Units
V
V
V
mV
mV/V
μA
mA
μA
Ω
Reference Input Voltage
Reference Drift
Voltage Ratio, Ref to Cathode
(note 4)
Reference Input Current
Minimum Operating Current
Off-State Cathode Current
Dynamic Impedance
V
REF
B
B
I
K
= 10mA, V
KA
= V
REF
,0.7%
B
B
B
B
B
B
I
K
= 10mA, V
KA
= V
REF
,1.0%
B
B
B
B
B
B
I
K
= 10mA, V
KA
= V
REF
, 0 C
≤
T
A
≤
70 C
O
P
B
B
B
B
B
B
P
I
K
= 10mA, V
KA
= 2.5V to 36V
B
B
B
B
I
REF
B
B
B
I
K
= 10mA,V
KA
= V
REF
B
B
B
B
B
B
B
B
B
B
B
B
I
K
= 10mA,V
KA
= V
REF
, 0
O
C
≤
T
A
≤
70
O
C
P
P
B
B
P
P
B
I
MIN
I
OFF
B
B
V
KA
= V
REF
B
B
B
B
B
B
0.4
B
B
V
KA
= 36V, V
REF
= 0V
V
KA
= V
REF
, I
K
= 1mA to 100mA,
B
B
B
B
B
B
0.1
0.2
|Z
KA
|
B
B
f
≤
1kHz
Note 3: These parameters are guaranteed by design
Note 4:
V
REF
B
B
V
KA
B
B
Ratio of change in reference input voltage to the change in cathode voltage
2006/10/11
Rev.1.4
Champion Microelectronic Corporation
Page 4
CM431
L
OW
V
OLTAGE
A
DJUSTABLE
S
HUNT
R
EGULATOR
PARAMETER MEASUREMENT INFORMATION
Input
V
KA
B
B
Input
V
KA
B
B
R1
I
REF
B
B
R2
V
RE
B
EF
B
(1 + R1/R2) + I
REF
x R1
B
B
B
B
B
B
Figure 1.
Test Circuit for V
KA
= V
REF
B
B
B
B
Figure 2.
Test Circuit for V
KA
>
V
REF
Input
B
V
KA
B
B
I
OFF
B
Figure 3.
Test Circuit for I
OFF
B
2006/10/11
Rev.1.4
Champion Microelectronic Corporation
Page 5
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