SC431CSK-5 PDF даташит
Спецификация SC431CSK-5 изготовлена «Semtech Corporation» и имеет функцию, называемую «ADJUSTABLE SHUNT REGULATOR». |
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Детали детали
Номер произв | SC431CSK-5 |
Описание | ADJUSTABLE SHUNT REGULATOR |
Производители | Semtech Corporation |
логотип |
6 Pages
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ADJUSTABLE SHUNT REGULATOR
SC431
April 13, 1998
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The SC431 is a three terminal adjustable shunt regula-
tor with thermal stability guaranteed over temperature.
The output voltage can be adjusted to any value from
2.5V (VREF) to 36V with two external resistors. The
SC431 has a typical dynamic output impedance of
0.25Ω. Active output circuitry provides a very sharp
turn on characteristic, making the SC431 an excellent
replacement for zener diodes.
The SC431 shunt regulator is available in three voltage
tolerances (0.5%, 1.0% and 2.0%) and three package
options (SOT-23-3, SO-8 and TO-92). The three volt-
age tolerances allow the designer the opportunity to
select the proper cost/tolerance for their application.
FEATURES
• Wide operating current range 100µA to 150mA
• Low dynamic output impedance 0.25 Ω typ.
• Trimmed bandgap design + 0.5%
• Alternate for TL431, LM431 & AS431
APPLICATIONS
• Linear Regulators
• Adjustable Supplies
• Switching Power Supplies
• Battery Operated Computers
• Instrumentation
• Computer Disk Drives
PIN CONFIGURATIONS
SOT-23 -3 Lead (Top View)
BLOCK DIAGRAM
SOIC 8 Lead (Top View)
TO-92 (Top View)
SYMBOL DIAGRAM
© 1998 SEMTECH CORP.
1
652 MITCHELL ROAD NEWBURY PARK CA 91320
No Preview Available ! |
ADJUSTABLE SHUNT REGULATOR
April 13, 1998
ABSOLUTE MAXIMUM RATINGS
Parameter
Cathode Voltage
Continous Cathode Current
Reference Input Current
Operating Junction Temperature Range
Storage Temperature Range
Thermal Resistance
TO-92
SO-8
SOT-23
Power Dissipation at TA = 25°C
TO-92
SO-8
SOT-23
Lead Temperature (Soldering) 10 seconds
Symbol
VZ
IZ
IREF
TJ
TSTG
θJA
PD
TLEAD
Maximum
37
150
10
-40 to +150
-65 to +150
160
175
410
0.78
0.71
0.30
260
SC431
Units
V
mA
mA
°C
°C
°C/W
W
°C
ORDERING INFORMATION
PACKAGE
SO-8 (1)
SOT-23 (1)
TO-92 (1)(2)
0.5%
SC431CS - .5
SC431CSK - .5
SC431CZ - .5
Notes:
(1) Add suffix ‘TR’ for Tape & Reel.
(2) Add suffix ‘TA’ for Tape Ammo.
TOLERANCE
1.0%
2.0%
SC431CS - 1
SC431CS - 2
SC431CSK - 1
SC431CSK - 2
SC431CZ - 1
SC431CZ - 2
T/R Quantity
2.5K
3K
TR=3K, TA=2K
© 1998 SEMTECH CORP.
2
652 MITCHELL ROAD NEWBURY PARK CA 91320
No Preview Available ! |
ADJUSTABLE SHUNT REGULATOR
SC431
April 13, 1998
ELECTRICAL CHARACTERISTICS
Unless specified, TA = 25°C
Parameter
Symbol
Condition
SC431 0.5%
SC431 1%
SC431 2%
MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
Reference Voltage
VREF Temp Deviation
Ratio of Change in
VREF to Change in
Cathode Voltage
VREF
VDEV
∆ V REF
∆VZ
VZ = VREF
IZ = 10mA
(test circuit 1)
TA = 25°C
TA = -40 to +85°C, VZ = VREF
(test circuit 1) IZ = 10mA
2.482 2.495 2.507 2.470 2.495 2.520 2.445 2.495 2.545
8 17
8 25
15 30
V
mV
IZ = 10mA, ∆VZ = 10V to VREF
-0.5 -2.7
-0.5 -2.7
-0.5 -2.7
mV/V
Reference Input
Current
IZ = 10mA, ∆VZ = 36V to 10V
IREF R1 = 10kΩ, R2 = ∞,
IZ = 10mA
(test circuit 2)
IREF Temp Deviation
IREF(DEV)
TA = -40 to +85°C,
R1 = 10kΩ, R2 = ∞, IZ =10mA
(test circuit 2)
Off State Cathode
Current
IZ (off)
VREF = 0V, VZ = 36V
(test circuit 3)
Dynamic Output
rZ
f < 1kHz, VZ = VREF
Impedance
IZ = 100uA to 100mA
(test circuit 1)
Minimum Operating
Current
IZ (min)
VZ = VREF
(test circuit 1)
-1.0 -2.0
0.5 4
0.4 1.2
0.04 0.5
0.25 0.5
100
-1.0 -2.0
0.5 4
0.4 1.2
0.04 0.5
0.25 0.5
100
-1.0 -2.0
0.5 4
µA
0.4 1.2 µA
0.04 0.5 µA
0.25 0.5
100
Ω
µA
TEST CIRCUITS
Test Circuit 1:
VZ = VREF
Test Circuit 2:
VZ > VREF
RECOMMENDED OPERATING CONDITIONS
Cathode Voltage, VZ
Cathode Current, IZ
Min
VREF
0.1
Max
36
150
Symbol
V
mA
Test Circuit 3:
Off State Current
3
© 1998 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
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Номер в каталоге | Описание | Производители |
SC431CSK-1 | ADJUSTABLE SHUNT REGULATOR | Semtech Corporation |
SC431CSK-2 | ADJUSTABLE SHUNT REGULATOR | Semtech Corporation |
SC431CSK-5 | ADJUSTABLE SHUNT REGULATOR | Semtech Corporation |
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