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參數(shù)資料
| 型號： | SC4431CSK-X |
| 廠商： | Semtech Corporation |
| 英文描述： | Shunt Regulator With Open Collector Output |
| 中文描述： | 并聯(lián)穩(wěn)壓集電極開路輸出 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 252K |
| 代理商： | SC4431CSK-X |
POWER MANAGEMENT
Description
The SC4431 is a four terminal device for regulating an
isolated power supply with output voltages down to 1.5V.
1
www.semtech.com
SC4431
Shunt Regulator With
Open Collector Output
Revision September 9 ,2003
It is intended to be used as a replacement for three
terminal shunt regulators such as SC431L where the
output voltage is too low for the device to function in
conjunction with an opto-isolator. SC4431 achieves this
by having seperate supply and output pins, allowing the
output to sink current at voltages as low as 0.1V, while
the supply pin still has sufficient voltage for the device to
function. In this way, allowing for a 1.4V drop through an
opto-isolator diode, regulation down to 1.5V out can be
achieved.
The SC4431 shunt regulator is available with three
initial 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
Typical Application Circuit
Applications
Telecom Power Supplies
Opto driver for very low output voltage (1.5V)
isolated power supplies
Battery operated applications
Point of use power supplies
Open Collector output drives Optoisolator with
as little as 1.5V input voltage
Trimmed bandgap design - initial accuracies
to + 0.5%
40mA drive capability
Regulates output as low as 50mV
Wide supply voltage range - 1.5V to 15V
Low supply current - typically 110μA
Full industrial temperature range
SOT-23 5 lead package
2V OUT
R1
U1
4N25
5
OUT
R3
6.34k
C2
22nF
C1
33nF
R2
5.1k
VIN
T1
R4
10k
Primary Side
Controller
Secondary Side
Rectification
and Filtering
SC4431
1
4
VCC
GND
NC
REF
3
2
C3
2V Output Isolated Power Supply
相關PDF資料 |
PDF描述 |
|---|---|
| SC4431 | SHUNT REGULATOR WITH OPEN COLLECTOR OR OUTPUT |
| 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 |
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