ETC CM431AACM89 Low voltage adjustable shunt regulator Datasheet

CM431A
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
GENERAL DESCRIPTION
FEATURES
The CM431A is a three-terminal adjustable shunt voltage
Initial voltage reference accuracy of 1.0%.
regulator with specified thermal stability and pin-to-pin compatible
Sink current capability from 1mA to 100mA
with the earlier 431 series. The output voltage can be adjusted to
Typical output dynamic impedance less than 200mΩ;
any value between VREF and 18V by using two external resistors.
Adjustable output voltage from VREF to 18V
The CM431A offers low output impedance for improved load
Available in SOT-23, SOT-89, TO-92, & SOP-8
regulation with a typical output impedance of 200mΩ. Because
Low output noise
of the active output circuitry, the CM431A can replace the zener
Typical equivalent full range temperature coefficient of
diodes in applications such as switching power supplies, OVP
30ppm/ OC
APPLICATIONS
crowbar 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
CM431AXCM233 CM431AXCM2R3
1
1
2
REF
CATHODE
Pin 2
CATHODE
REF
Pin 3
ANODE
ANODE
Suffix “X”: Grade “A”, “B”, “C”, “D”, or “E”
2
3
SOT-23-5
SOT-89
Top View
Top View
2
2
CATHODE
ANODE
REF
CATHODE REF
NC
NC
1
1
SOP-8
Top View
4
ANODE
5
2004/08/27
Pin 1
1
CATHODE
REF
8
2
NC
NC
7
3
NC
ANODE
6
4
NC
NC
5
3
3
Champion Microelectronic Corporation
Page 1
CM431A
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
TYPICAL APPLICATION
BLOCK DIAGRAM
VO = 5V
V+
CATHODE
Rb
Note: Rb should
provide cathode
current ≥ 1mA
R1
27.5K
0.1%
+
REF
-
R2
27.5K
0.1%
VREF
ANODE
5V Precision Regulator
2004/08/27
Champion Microelectronic Corporation
Page 2
CM431A
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
ORDERING INFORMATION
PACKAGE
TOLERANCE
0.5%
1.0%
1.5%
T/R Quantity
SOT-23-3(1)
CM431AACM233
CM431ABCM233
CM431AECM233
TR=3K
SOT-23-3(1)
CM431AACM2R3
CM431ABCM2R3
CM431AECM2R3
TR=3K
SOT-23-5(1)
CM431AACM235
CM431ABCM235
CM431AECM235
TR=3K
SOT-89(1)
CM431AACM89
CM431ABCM89
CM431AECM89
TR=1K
TO-92(2)
CM431AACN
CM431ABCN
CM431AECN
TA=2K
SOP-8
CM431AACS
CM431ABCS
CM431AECS
SOT-23-3(1)
CM431AGACM233*
CM431AGBCM233*
CM431AGECM233*
TR=3K
SOT-23-3(1)
CM431AGACM2R3*
CM431AGBCM2R3*
CM431AGECM2R3*
TR=3K
SOT-23-5(1)
CM431AGACM235*
CM431AGBCM235*
CM431AGECM235*
TR=3K
SOT-89(1)
CM431AGACM89*
CM431AGBCM89*
CM431AGECM89*
TR=1K
TO-92(2)
CM431AGACN*
CM431AGBCN*
CM431AGECN*
TA=2K
SOP-8
CM431AGACS*
CM431AGBCS*
CM431AGECS*
Notes:
(1) Add suffix ″TR″for Tape & Reel.
(2) Add suffix ″TA″for Tape Ammo.
(3)
2004/08/27
*Note: Add suffix “G” for Pb Free Product
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Page 3
CM431A
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
ABSOLUTE MAXIMUM RATINGS
Cathode to Anode Voltage (VKA) (Note 2)
-0.3V to 18V
Continuous Cathode Current (IK)
-100mA to 150mA
Reference Input Current (IREF)
-50uA to 10mA
Maximum junction temperature range, TJ
150 OC
Storage temperature range
-65OC to 150OC
Lead temperature (soldiering, 10 seconds)
260 OC
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
θJA
( C/W )
Derating factor ( mW/OC )
O
TA≧25 C
TA≦25 OC
Power rating(mW)
TA=70 OC
Power rating(mW)
TA= 85 OC
Power rating (mW)
TA= 105 OC
Power rating (mW)
SOP-8
165
6.06
757
485
394
272
TO-92
156
6.41
801
513
417
288
SOT-89
71(note)
14.1
1763
1128
916
635
SOT-23
285
3.5
438
280
228
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.
158
Package
O
RECOMMENDED OPERATING CONDITIONS
Min
Max
Operating free air temperature range, TA
0
105
Cathode current, IK
1
100
mA
Cathode voltage, VKA
0
16
V
2004/08/27
Champion Microelectronic Corporation
Units
O
C
Page 4
CM431A
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over the operating ambient temperatures with TA = 25°C.
Parameter
Reference Input Voltage
Symbol
VREF
Test Conditions
CM431A
Typ
Max
IK = 10mA, VKA = VREF ,0.5%
2.488
2.5
2.512
V
IK = 10mA, VKA = VREF ,1.0%
2.475
2.5
2.525
V
IK = 10mA, VKA = VREF ,1.5%
2.463
2.5
2.537
V
4
17
mV
-1.4
-2.7
mV/V
4
µA
IK = 10mA, VKA = VREF, 0OC ≤ TA ≤ 70 OC
Reference Drift
Voltage Ratio, Ref to Cathode
IK = 10mA, VKA = 2.5V to 18V
(note 4)
Reference Input Current
IREF
Units
Min
IK = 10mA,VKA = VREF
2
IK = 10mA,VKA = VREF, 0OC ≤ TA ≤ 70 OC
2.3
Minimum Operating Current
IMIN
VKA = VREF
0.4
1
mA
Off-State Cathode Current
IOFF
VKA = 18V, VREF = 0V
0.1
1
µA
Dynamic Impedance
|ZKA |
0.2
0.5
Ω
VKA = VREF, IK = 1mA to 100mA,
f ≤ 1kHz
Note 3: These parameters are guaranteed by design
Note 4:
VREF
VKA
2004/08/27
Ratio of change in reference input voltage to the change in cathode voltage
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Page 5
CM431A
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
PARAMETER MEASUREMENT INFORMATION
Input
VKA
Input
VKA
R1
IREF
R2
VRE
(1 + R1/R2) + IREF x R1
Figure 1. Test Circuit for VKA = VREF
Input
Figure 2. Test Circuit for VKA > VREF
VKA
IOFF
Figure 3. Test Circuit for IOFF
2004/08/27
Champion Microelectronic Corporation
Page 6
CM431A
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
2004/08/27
Champion Microelectronic Corporation
Page 7
CM431A
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
APPLICATION INFORMATION
VBATT
R*
VO
R1
0.1%
VBATT
CM431A
VO
CM431A
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
CM431A of minimum VBATT
Figure 5. Single –Supply Comparator With Temperature
compensated threshold.
Figure 4. Shunt Regulator
VBATT
VO
VBATT
VO
R1
R1
CM431A
R2
CM431A
R2
C
VO = (1 + R1/R2) × VREF
Figure 6. High-Current Shunt Regulator
2004/08/27
Champion Microelectronic Corporation
Figure 7. Crowbar Circuit
Page 8
CM431A
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
APPLICATION INFORMATION (continued)
VBATT
VBATT
VO = 5V/1.5A
LM317
IO =
VREF/RS
Adjust
8.2KΩ
243Ω
0.1%
CM431A
CM431A
RS
0.1%
243Ω
0.1%
Figure 8.Precision 5V, 1.5A Regulator
VBATT
Figure 9. Precision Constant Current Sink
RCL
0.1%
IN
78L05
Common
OUT
VO
VBATT
R1
IO
R1
CM431A
R2
CM431A
IOUT = (VREF/RCL) + IKA
VO = (1 + R1/R2) × VREF
R1 = VBATT/((IO/hFE) + IKA)
Min VO = VREF + 5V
Figure 10. Output Control of a Three-Terminal
Fixed Regulator
2004/08/27
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Figure 11. Precision Current Limiter
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CM431A
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
PACKAGE DIMENSION
TO-92
θ
A
A1
b
D
A
D1
E
L
e
θ
θ1
A1
L
θ1
e
D
D1
b
E
SOT-23-3
D
3
b1
With Plating
c
c1
A
A1
E
E1
A2
b
b
Base Metal
b1
c
Section B-B
c1
D
E
1
E1
2
e
b
L
e1
L1
e
θ1
e1
θ
θ1
θ
A2
A
θ2
θ2
A1
L
2004/08/27
See Section B-B
Champion Microelectronic Corporation
L1
Page 10
CM431A
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
PACKAGE DIMENSION (CONTINUED)
SOT-23-5
D
5
4
b1
With Plating
c
c1
A
A1
E
E1
A2
b
b
Base Metal
b1
c
Section B-B
c1
D
E
1
2
3
E1
e
b
L
e1
L1
e
θ1
e1
θ
θ1
θ
A2
A
θ2
θ2
A1
L
L1
See Section B-B
SOT-89
D
D1
L
5°
H
E
φ1.0
C
e
e1
A
8°
L
b
b1
C
D
D1
H
E
e1
b
2004/08/27
b1
b
Champion Microelectronic Corporation
e
Page 11
CM431A
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
PACKAGE DIMENSION (CONTINUED)
8-PIN SOP (S08)
PIN 1 ID
θ
θ
2004/08/27
Champion Microelectronic Corporation
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CM431A
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
NUMBERING SCHEME
Ordering Number: CM431AXYZ (note1)
Ordering Number: CM431AGXYZ (note2)
note1:
X : Suffix for Reference Voltage Tolerance (note 3)
Y : Suffix for Temperature Range (note 4)
Z : Suffix for Package Type (note 5)
note2:
G : Suffix for Pb Free Product
X : Suffix for Reference Voltage Tolerance (note 3)
Y : Suffix for Temperature Range (note 4)
Z : Suffix for Package Type (note 5)
note 3: see the Reference Voltage Tolerance Suffix Table
note 4:
Y= C: 0℃~+105℃
note 5:
Z is single alphabet with or without digits
M233 : SOT-23-3 (TR only)
M2R3: SOT-23-3 (TR only) but pin assignment is different with M233
M235 : SOT-23-5 (TR only)
M89:SOT-89(TR only)
N:TO-92(TA only)
S:SOP-8(TR only)
Reference Voltage Tolerance Suffix Table
2004/08/27
Tolerance
Suffix
0.5%
A
1%
B
1.5%
E
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CM431A
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.
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Sales & Marketing
5F, No. 11, Park Avenue II,
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