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參數資料
| 型號： | SC4431 |
| 廠商： | Semtech Corporation |
| 英文描述： | SHUNT REGULATOR WITH OPEN COLLECTOR OR OUTPUT |
| 中文描述： | 分流調節器或開路集電極輸出 |
| 文件頁數： | 1/5頁 |
| 文件大小： | 51K |
| 代理商： | SC4431 |
2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
SHUNT REGULATOR WITH OPEN
COLLECTOR OR OUTPUT
SC4431
PRELIMINARY - September 11, 2000
1
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.
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.
TYPICAL APPLICATION CIRCUIT
2V OUT
R1
U1
4N25
U2
SC4431
1
2
3
4
5
VCC
GND
NC
REF
OUT
R4
10k
R3
6.34k
C2
C1
33nF
R2
5.1k
VIN
T1
Primary Side
Controller
Secondary Side
Rectification
and Filtering
2V Output Isolated Power Supply
相關PDF資料 |
PDF描述 |
|---|---|
| SC4431CSK-0.5TR | SHUNT REGULATOR WITH OPEN COLLECTOR OR OUTPUT |
| SC4431CSK-1TR | SHUNT REGULATOR WITH OPEN COLLECTOR OR OUTPUT |
| SC4431CSK-2TR | SHUNT REGULATOR WITH OPEN COLLECTOR OR OUTPUT |
| SC4501 | 2Amp, 2MHz Step-Up Switching Regulator with Soft-Start |
| SC4501EVB | 2Amp, 2MHz Step-Up Switching Regulator with Soft-Start |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SC4431_03 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Shunt Regulator With Open Collector Output |
| SC4431CSK-.5TRT | 制造商:Semtech Corporation 功能描述: 制造商:Semtech Corporation 功能描述:Voltage Regulator IC |
| SC4431CSK-0.5.TRT | 制造商:Semtech Corporation 功能描述: |
| SC4431CSK-0.5TR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:SHUNT REGULATOR WITH OPEN COLLECTOR OR OUTPUT |
| SC4431CSK-1 TRT | 制造商:Semtech Corporation 功能描述: |
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