SC431CSK-2TR Semtech, SC431CSK-2TR Datasheet

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SC431CSK-2TR

Manufacturer Part Number
SC431CSK-2TR
Description
Shunt Voltage Regulator IC
Manufacturer
Semtech
Datasheet
1.SC431CSK-2TR.pdf (6 pages)

Specifications of SC431CSK-2TR

Leaded Process Compatible
No
Peak Reflow Compatible (260 C)
No
Reel Quantity
3000
Voltage Regulator Type
Adjustable Shunt
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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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SC431CSK-2TR Summary of contents

Page 1

... PIN CONFIGURATIONS SOT-23 -3 Lead (Top View) SOIC 8 Lead (Top View) TO-92 (Top View) © 1998 SEMTECH CORP. ADJUSTABLE SHUNT REGULATOR TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com FEATURES Wide operating current range 100µA to 150mA Low dynamic output impedance 0.25 Trimmed bandgap design + 0.5% Alternate for TL431, LM431 & ...

Page 2

... 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

... TEST CIRCUITS Test Circuit REF RECOMMENDED OPERATING CONDITIONS Min Cathode Voltage REF Cathode Current, I 0.1 Z © 1998 SEMTECH CORP. ADJUSTABLE SHUNT REGULATOR SC431 0.5% Condition MIN TYP MAX T = 25°C 2.482 2.495 2.507 2.470 2.495 2.520 2.445 2.495 2.545 REF ...

Page 4

... T (°C) J Ratio of Delta Reference Voltage to Delta Cathode Voltage vs. Junction Temperature 0 10mA 36V Z 0.4 0.3 0.2 0.1 0 -50 - (°C) J © 1998 SEMTECH CORP. ADJUSTABLE SHUNT REGULATOR Cathode Current vs. Cathode Voltage 150 100 50 0 -50 -100 -150 100 I = 10mA 10k 100 125 ...

Page 5

... Reference Impedance vs. Frequency 100 I = 10mA 25° 0.1 0.01 1.0E+03 1.0E+04 1.0E+05 f (Hz) APPLICATION CIRCUIT © 1998 SEMTECH CORP. ADJUSTABLE SHUNT REGULATOR Test Circuit For Small-Signal -180 I = 10mA Z -225 T = 25°C A -270 -315 -360 -405 -450 -495 -540 -585 -630 1 ...

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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