SC431CS-2 SEMTECH [Semtech Corporation], SC431CS-2 Datasheet

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SC431CS-2

Manufacturer Part Number
SC431CS-2
Description
ADJUSTABLE SHUNT REGULATOR
Manufacturer
SEMTECH [Semtech Corporation]
Datasheet
April 13, 1998
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 (V
SC431 has a typical dynamic output impedance of
0.25 . 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.
PIN CONFIGURATIONS
© 1998 SEMTECH CORP.
REF
) to 36V with two external resistors. The
SOT-23 -3 Lead (Top View)
SOIC 8 Lead (Top View)
TO-92 (Top View)
ADJUSTABLE SHUNT REGULATOR
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
FEATURES
APPLICATIONS
BLOCK DIAGRAM
SYMBOL DIAGRAM
652 MITCHELL ROAD NEWBURY PARK CA 91320
Wide operating current range 100µA to 150mA
Low dynamic output impedance 0.25
Trimmed bandgap design + 0.5%
Alternate for TL431, LM431 & AS431
Linear Regulators
Adjustable Supplies
Switching Power Supplies
Battery Operated Computers
Instrumentation
Computer Disk Drives
typ.
SC431
1

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SC431CS-2 Summary of contents

Page 1

April 13, 1998 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. 36V with two external resistors. The ...

Page 2

... REF STG LEAD TOLERANCE 0.5% 1.0% SC431CS - .5 SC431CS - 1 SC431CSK - 1 SC431CZ - .5 SC431CZ - 1 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC431 Maximum Units 37 V 150 -40 to +150 °C -65 to +150 °C 160 °C/W 175 410 0.78 W 0.71 0.30 260 °C 2.0% T/R Quantity SC431CS - 2 2.5K SC431CSK - 2 3K SC431CZ - 2 TR=3K, TA=2K 2 ...

Page 3

April 13, 1998 ELECTRICAL CHARACTERISTICS Unless specified 25°C A Parameter Symbol REF Reference Voltage 10mA REF Z (test circuit 1) V Temp Deviation -40 to +85°C, V REF ...

Page 4

April 13, 1998 TYPICAL CHARACTERISTICS Cathode Current vs. Cathode Voltage 300 REF 200 100 0 -100 -200 -300 - (V) Z Reference Voltage vs. Junction Temperature ...

Page 5

April 13, 1998 TYPICAL CHARACTERISTICS (Cont.) Small-Signal Gain and Phase Shift vs. Frequency -10 -20 1.0E+02 1.0E+03 1.0E+04 1.0E+05 f (Hz) Reference Impedance vs. Frequency 100 I = 10mA Z T ...

Page 6

April 13, 1998 OUTLINE DRAWING SOT-23 OUTLINE DRAWING SO-8 OUTLINE DRAWING TO-92 © 1998 SEMTECH CORP. ADJUSTABLE SHUNT REGULATOR 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC431 6 ...

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