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PDF SC4431CSK-2TR Data sheet ( Hoja de datos )
| Número de pieza | SC4431CSK-2TR | |
| Descripción | SHUNT REGULATOR WITH OPEN COLLECTOR OR OUTPUT | |
| Fabricantes | Semtech Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SC4431CSK-2TR (archivo pdf) en la parte inferior de esta página. Total 5 Páginas | ||
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SHUNT REGULATOR WITH OPEN
COLLECTOR OR OUTPUT
SC4431
PRELIMINARY - September 11, 2000
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The SC4431 is a four terminal device for regulating an
isolated power supply with very low output voltage.
It is intended to be used as a replacement for three ter-
minal shunt regulators such as SC431L where the out-
put voltage is too low for them to function in conjunc-
tion with an opto-isolator. It achieves this by having
seperate supply and output pins, allowing the output to
sink current at voltages as low as 0.2V, while the sup-
ply pin still has sufficient voltage for the device to func-
tion. In this way, allowing for a 1.6V drop through an
opto-isolator diode, regulation down to 1.8V out can be
achieved.
The SC4431 shunt regulator is available with three ini-
tial reference voltage accuracies (0.5%, 1.0% and
2.0%) in the space saving 5-lead SOT-23 package.
The three voltage tolerances allow the designer the
opportunity to select the proper cost/tolerance for their
application.
TYPICAL APPLICATION CIRCUIT
FEATURES
•= Trimmed bandgap design - initial accuracies to
+ 0.5%
•= 40mA drive capability
•= Wide supply voltage range - 1.5V to 15V
•= Low supply current - typically 110µA
•= Full industrial temperature range
APPLICATIONS
•= Opto driver for very low output voltage isolated
power supplies
ORDERING INFORMATION
Part Number(1)(2)
Package
SC4431CSK-X.TR
SOT-23-5
Notes:
(1) Where “-X” denotes initial reference voltage toler-
ance. Available options are ±0.5% (-.5), ±1% (-1) and
±2% (-2).
(2) Only available in tape and reel packaging. A reel
contains 3000 devices.
T1
Primary Side
VIN Controller
Secondary Side
Rectification
and Filtering
R1
R2
2V OUT
C1
U1
4N25
5.1k 33nF
U2 1 SC4431
VCC
5 OUT
REF 4
C2
22nF
NC 3
GND
2
R3
6.34k
R4
10k
2V Output Isolated Power Supply
© 2000 SEMTECH CORP.
1
652 MITCHELL ROAD NEWBURY PARK CA 91320
1 page  
PRELIMINARY - September 11, 2000
DEVICE OUTLINE - SOT-23-5
SHUNT REGULATOR WITH OPEN
COLLECTOR OR OUTPUT
SC4431
LAND PATTERN - SOT-23-5
ECN 00-1315
© 2000 SEMTECH CORP.
5
652 MITCHELL ROAD NEWBURY PARK CA 91320
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet SC4431CSK-2TR.PDF ] | |
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