CM431L [ETC]
Voltage Reference |Voltage Reference & OPs ; 基准电压源|电压参考和有机磷农药\n
| 型号： | CM431L |
| 厂家： | 
ETC |
| 描述： | Voltage Reference |Voltage Reference & OPs
|
| 文件： | 总12页 (文件大小：284K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CM431L
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
GENERAL DESCRIPTION
FEATURES
The CM431L is a low voltage three terminal adjustable shunt ꢀ
regulator with thermal stability guaranteed over temperature. ꢀ
The output voltage can be adjusted to any value from 1.24V ꢀ
（VREF）to 20V with two external resistors. The CM431L has a ꢀ
LOW voltage operation（1.24V）
Adjustable output voltage V0 = VREF to 20V
Wide operating current range 60µA to 100mA
LOW dynamic output impedance 0.25Ω typ.
Trimmed bandgap design ± 0.5%
typical dynamic output impedance of 0.25Ω. Active output
circuitry provides a very sharp turn on characteristic, making
the CM431L an excellent replacement for zener diodes.
ꢀ
APPLICATIONS
The CM431L shunt regulator is available in four voltage
tolerances（0.5%, 0.7%, 1.0% and 2.0%）and four package
options (SOT-23-3, SOT-23-5, SOT-89, TO-92, and SOP-8).
Four voltage tolerances allow the designer the opportunity to
select the proper cost/tolerance for their application.
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
Linear Regulators
Adjustable Supplies
Switching Power Supplies
Battery Operated Computers
Instrumentation
Computer Disk Drivers
PIN CONFIGURATION
TO-92
SOT-23-3
Top View
3
Front View
CM431LXCM233 CM431LXCM2R3
Pin 1
REF
CATHODE
REF
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
Top View
SOP-8
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
2002/05/14 Rev. 3
Champion Microelectronic Corporation
Page 1
CM431L
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
BLOCK DIAGRAM
BLOCK DIAGRAM
SYMBOL DIAGRAM
Cathode
Ref
Anode
ORDERING INFORMATION
PACKAGE
TOLERANCE
0.5%
0.7%
1.0%
2.0%
T/R Quantity
TR=3K
（1）
SOT-23-3
SOT-23-3
SOT-23-5
CM431LACM233
CM431LACM2R3
CM431LACM235
CM431LACM89
CM431LACN
CM431LDCM233
CM431LDCM2R3
CM431LDCM235
CM431LDCM89
CM431LDCN
CM431LBCM233
CM431LBCM2R3
CM431LBCM235
CM431LBCM89
CM431LBCN
CM431LCCM233
CM431LCCM2R3
CM431LCCM235
CM431LCCM89
CM431LCCN
（1）
TR=3K
（1）
TR=3K
（1）
SOT-89
TR=1K
（2）
TO-92
SOP-8
TA=2K
CM431LACS
CM431LDCS
CM431LBCS
CM431LCCS
Notes：
（1） Add suffix ″TR″for Tape & Reel.
（2） Add suffix ″TA″for Tape Ammo.
2002/05/14 Rev. 3
Champion Microelectronic Corporation
Page 2
CM431L
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
ABSOULTE MAXIMUM RATINGS
Parameter
Symbol
Maximum
Units
Cathode Voltage
VZ
20
V
Continuous Cathode Current
Reference Current
IZ
IREF
TJ
100
3
mA
mA
℃
Operating Junction Temperature Range
Storage Temperature Range
-40 to +150
-65 to + 150
TSTG
℃
Thermal Resistance
TO-92
SOT-23-3
SOT-23-5
SOT-89
θJA
℃/W
160
410
256
110
175
SOP-8
Power Dissipation at TA =25℃
TO-92
SOT-23-3
SOT-23-5
SOT-89
PD
0.78
0.30
0.30
1.00
0.71
W
SOP-8
Lead Temperature（Soldering）10 seconds
TLEAD
250
℃
RECOMMENDED OPERATING CONDITION
Min
VREF
80
Max
16
100
105
Symbol
Cathode Voltage. Vz
Cathode Current. Iz
Operating Temperature
V
mA
℃
0
2002/05/14 Rev. 3
Champion Microelectronic Corporation
Page 3
CM431L
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
ELECTRICAL CHARACTERISTICS Unless specified, TA = 25℃
CM431L 0.5%
MIN TYP MAX MIN TYP MAX UNITS
1.234 1.240 1.246 1.231 1.240 1.249
CM431L 0.7%
Parameter
Symbol
Condition
TA=25℃
TA=-40 to+85℃ 1.222
Reference
Voltage
VREF Vz=VREF
Iz=10mA
,
V
1.258 1.222
1.258
VREF Temp
Deviation
VDEV TA=-40 to +85℃, Vz= VREF
10
25
10
25
mV
Iz=10mA
Ratio of Change
in
VREF to Change in
ΔVREF Iz=10mA, ΔVZ=16V to VREF
ΔVz
-1.0
-2.7
-1.0 -2.7 mV/V
Cathode Voltage
Reference Input
Current
IREF R1=10kΩ, R2=∞, Iz=10mA
0.15
0.1
0.5
0.4
0.15
0.1
0.5
0.4
µA
IREF Temp
Deviation
IREF
（
）
TA=-40 to +85℃ R1=10 kΩ
R2= ∞, Iz=10mA
DEV
µA
µA
Off State Cathode Iz
Current
（
）
VREF=0V
VZ=6V
0.5
0.5
2.0
2.0
0.5
0.5
2.0
2.0
off
VZ=16V
Dynamic Output
Impedance
rz
f < 1KHz, VZ= VREF
0.25
60
0.4
80
0.25
60
0.4
80
Ω
Iz=100µA to 100 mA
Minimum
Operating
Current
IZ
（
）
VZ= VREF
min
µA
2002/05/14 Rev. 3
Champion Microelectronic Corporation
Page 4
CM431L
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
ELECTRICAL CHARACTERISTICS (CONTINUED) Unless specified, TA = 25℃
CM431L 1%
MIN TYP MAX MIN TYP MAX UNITS
1.228 1.240 1.252 1.215 1.240 1.265
CM431L 2%
Parameter
Symbol
Condition
TA=25℃
TA=-40 to+85℃ 1.215
Reference
Voltage
VREF Vz=VREF
Iz=10mA
,
V
1.265 1.200
1.280
VREF Temp
Deviation
VDEV TA=-40 to +85℃, Vz= VREF
10
25
10
35
mV
Iz=10mA
Ratio of Change
in VREF to Change
in Cathode
ΔVREF Iz=10mA, ΔVZ=16V to VREF
ΔVz
-1.0
-2.7
-1.0
-2.7
mV/V
Voltage
Reference Input
Current
IREF R1=10kΩ, R2=∞, Iz=10mA
0.15
0.1
0.5
0.4
0.15
0.1
0.5
0.4
µA
IREF Temp
Deviation
IREF
（
）
TA=-40 to +85℃ R1=10 kΩ
R2= ∞, Iz=10mA
DEV
µA
µA
Off State Cathode Iz
Current
（
）
VREF=0V
VZ=6V
0.5
0.5
2.0
2.0
0.5
0.5
2.0
2.0
off
VZ=16V
Dynamic Output
Impedance
rz
f < 1KHz, VZ= VREF
0.25
60
0.4
80
0.25
60
0.4
60
Ω
Iz=100µA to 100 mA
Minimum
Operating
Current
IZ
（
）
VZ= VREF
min
µA
2002/05/14 Rev. 3
Champion Microelectronic Corporation
Page 5
CM431L
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
TYPICAL CHARACTERISTICS
Cathode Current vs. Cathode Voltage
Cathode Current vs. Cathode Voltage
300
200
100
0
150
100
50
0
-100
-200
-300
-50
Vz=VREF
-100
-150
TA=25℃
-1
-0.5
0
0.5
1
1.5
-1.5
-1
-0.5
0
0.5
1
1.5
Vz(V)
Vz(V)
Reference Voltage vs. Junction Temperature
Reference Input Current vs. Junction
Temperature
1.248
1.246
1.244
1.242
1.24
Iz=10mA
150
125
100
75
Iz=80uA
1.238
1.236
1.234
Iz=10mA
R1=10kΩ
50
R2=
∞
-50 -25
0
25
50
TJ(
75 100
-50 -25
0
25 50 75 100 125 150
)
℃
TJ(℃)
Ratio of Delta Ref. Voltage to Delta Cathode
Voltage vs. Junction Temperature
Off State Cathode Current vs. Junction
Temperature
250
200
150
100
50
1.2
VREF = 0V
1.1
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
Iz=10mA
△
Vz=16V to VREF
0
-50 -25
0
25
50
T (
75 100 125 150
-50 -25
0
25
50
(℃)
75 100 125 150
)
J
℃
T
J
2002/05/14 Rev. 3
Champion Microelectronic Corporation
Page 6
CM431L
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
TYPICAL CHARACTERISTICS (Conti)
Stability Boundary Condition
3.5
3
2.5
2
1.5
1
0.5
0
CL
2002/05/14 Rev. 3
Champion Microelectronic Corporation
Page 7
CM431L
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
APPLICATION CIRCUIT
Notes for Application Circuit：
1) Set VOUT according to the following equation：
VOUT =VREF ( 1 + R1/R2 ) +IREF R1
2) Choose the value for R as follows：
• The maximum limit for R should be such that the
cathode current, Iz, is greater than the minimum
operating current（80µA）at VIN
（
）.
min
• The minimum limit for R should be such that Iz
does not exceed 100mA under all load conditions,
and the instantaneous turn-on value for Iz does not
exceed 150mA. Both of the following conditions
must be met：
VIN max
150mA
VIN max
IOUT min
（
）
Rmin
≥
（to limit instantaneous turn-on Iz）
（
）
–VOUT
+ 100mA
Rmin
≥
（to limit Iz under normal operating conditions）
（
）
2002/05/14 Rev. 3
Champion Microelectronic Corporation
Page 8
CM431L
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
PACKAGE DIMENSION
TO-92
A
A1
b
D
D1
E
L
e
θ
θ1
A1
E
L
SOT-23-3
D
3
b1
With Plating
A
A1
A2
b
b
Base Metal
b1
c
Section B-B
c1
D
E
E1
L
1
2
e
b
L1
e
e1
e1
θ
θ1
θ2
L
L1
See Section B-B
2002/05/14 Rev. 3
Champion Microelectronic Corporation
Page 9
CM431L
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
PACKAGE DIMENSION (CONTINUED)
SOT-23-5
D
5
4
b1
With Plating
A
A1
A2
b
b
Base Metal
b1
c
Section B-B
c1
D
E
1
3
E1
L
e 2
b
L1
e
e1
e1
θ
θ1
θ2
L
L1
See Section B-B
SOT-89
D
D1
φ1.0
C
e
e1
A
L
b
b1
C
D
D1
H
E
e1
e
b
b
b1
2002/05/14 Rev. 3
Champion Microelectronic Corporation
Page 10
CM431L
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
PACKAGE DIMENSION (CONTINUED)
8-PIN SOP (S08)
PIN 1 ID
θ
2002/05/14 Rev. 3
Champion Microelectronic Corporation
Page 11
CM431L
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
Sales & Marketing
5F, No. 11, Park Avenue II,
Science-Based Industrial Park,
HsinChu City, Taiwan
11F, No. 306-3, SEC. 1, Ta Tung Road,
Hsichih, Taipei Hsien 221, Taiwan
TEL: +886-3-567 9979
FAX: +886-3-567 9909
TEL: +886-2-8692 1591
FAX: +886-2-8692 1596
2002/05/14 Rev. 3
Champion Microelectronic Corporation
Page 12
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