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參數(shù)資料
| 型號(hào)： | SC1543 |
| 廠商： | Semtech Corporation |
| 英文描述： | 400mA/200mA Dual 3.3V Smart Power Switch |
| 中文描述： | 400mA/200mA雙3.3V的智能功率開關(guān) |
| 文件頁數(shù)： | 1/5頁 |
| 文件大?。?/td> | 56K |
| 代理商： | SC1543 |
2000 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
400mA/200mA Dual 3.3V Smart
Power Switch
SC1543
PRELIMINARY - October 9, 2000
1
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The SC1543 provides a glitch free 3.3V output when
one of two 3.3V input sources is present. It does not
require external logic to sequence from one input
source to the other. Whenever VIN1 exceeds a
predetermined threshold value the internal MOSFET
connects it’s source voltage to the output. If the input at
VIN1 is below the threshold another internal MOSFET
connects VIN2 to the output. If both inputs are at 3.3V
then VIN1 will be connected to the output.
The SC1543 is designed to provide 400mA from the
main input (VIN1) and 200mA from the secondary input
(VIN2). A very low quiescent current of 10μA in
shutdown mode reduces power dissipation.
The internal logic and control circuit detects the voltage
levels of VIN1 and VIN2, and compares them to an
input reference voltage of 2.9V. An internally controlled
period of switch overlap ensures that the transition
between supplies is as glitch-free as possible.
The SC1543 is available in an MSOP-8 surface mount
package.
FEATURES
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Glitch free transitions between inputs
Internal logic selects appropriate input
400mA load current capability from main input
Low power shutdown mode
Industrial temperature range
APPLICATIONS
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Mini PCI cards
Peripheral cards
Instantly available personal computers (IAPCs)
ORDERING INFORMATION
Part Number
(1)
Package
SC1543IMSTR
MSOP-8
Note:
(1) Only available in tape and reel packaging. A reel
contains 2500 devices.
APPLICATION CIRCUIT
3.3V IN
3.3VAUX IN
3.3V OUT
SHUTDOWN
U1
SC1543
1
2
3
4
5
6
7
8
VIN1
VIN1
VIN2
VIN2
GND
VOUT
VOUT
SHDN
COUT
10uF
CIN2
1uF
CIN1
1uF
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SC1543IMSTR | 400mA/200mA Dual 3.3V Smart Power Switch |
| SC1544 | ACPI Controller for Advanced Motherboards |
| SC1544EVB | ACPI Controller for Advanced Motherboards |
| SC1544TS-X.XTR | ACPI Controller for Advanced Motherboards |
| SC1545 | 500mA SmartLDOTM With Power Up Signal Sequencing |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC1543IMSTR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:400mA/200mA Dual 3.3V Smart Power Switch |
| SC1544 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:ACPI Controller for Advanced Motherboards |
| SC1544EVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:ACPI Controller for Advanced Motherboards |
| SC1544TS-2.5TR | 制造商:Semtech Corporation 功能描述:DC DC Cntrlr Dual-OUT 5V Input 24-Pin TSSOP T/R |
| SC1544TS-X.XTR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:ACPI Controller for Advanced Motherboards |
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