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參數(shù)資料
| 型號： | SC1403ITSTRT |
| 廠商： | Semtech Corporation |
| 英文描述： | Mobile Multi-Output PWM Controller with Lossless Current Sense |
| 中文描述： | 移動(dòng)多輸出PWM控制器與無損電流檢測 |
| 文件頁數(shù)： | 1/31頁 |
| 文件大小： | 576K |
| 代理商： | SC1403ITSTRT |
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United States Patent No. 6,377,032
www.semtech.com
SC1403
Mobile Multi-Output PWM Controller
with Lossless Current Sense
POWER MANAGEMENT
Description
The SC1403 is a multiple-output power supply controller
designed to power battery operated systems. The
SC1403 provides synchronous buck converter control
for two (3.3V and 5V) power supplies. An efficiency of
95% can be achieved for the two supplies. The SC1403
uses Semtech’s proprietary Virtual Current Sense
tech-
nology along with external error amplifier compensation
to achieve enhanced stability and DC accuracy over a
wide range of output filter components while maintain-
ing fixed frequency operation. Lossless current sensing
can be used to eliminate current sense resistors and
reduce cost. The SC1403 also provides a 5V linear regu-
lator for system housekeeping. The 5V linear regulator
is derived from the battery; for improved efficiency, the
output is switched to the 5V output when available.
Revision 5, April 2004
Features
3.3V and 5V dual synchronous outputs, resistor
programmable to 2.5V
Fixed frequency or PSAVE operation for maximum
efficiency over wide load range
5V / 50mA linear regulator
Virtual Current Sense
for enhanced stability
Lossless current limiting
Out of phase switching reduces input capacitance
External compensation supports wide range of
output filter components
Programmable power-up sequence
Power Good output
Output overvoltage and overcurrent protection with
output undervoltage shutdown
6μA typical shutdown current
6mW typical quiescent power
Applications
Notebook and subnotebook computers
Tablet PCs
Embedded applications
Typical Application Circuit
Control functions include power-up sequencing, soft start,
power-good signaling, and frequency synchronization. Line
and load regulation is to +/-1%. The internal oscillator
can be set to 200kHz, 300kHz, or synchronized to an
external clock. The mosfet drivers provide >1A peak
drive current for fast mosfet switching.
The SC1403 includes a PSAVE# input to select pulse skip-
ping mode for high efficiency at light load, or fixed fre-
quency mode for low noise operation.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SC1403 | Mobile Multi-Output PWM Controller with Virtual Current SenseTM |
| SC1403ITSTR | Mobile Multi-Output PWM Controller with Virtual Current SenseTM |
| SC1404_05 | Differential Input, Dual, Simultaneous Sampling, 4.25 MSPS, 14-Bit, SAR ADC, 16-TSSOP, Ind Temp |
| SC1404 | Mobile Multi-Output PWM Controller with Virtual Current Sense |
| SC1404ISSTR | Mobile Multi-Output PWM Controller with Virtual Current Sense |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC1404 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:移動(dòng)多輸出PWM控制器用虛擬當(dāng)前SenseTM |
| SC1404_05 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Mobile Multi-Output PWM Controller with Virtual Current SenseTM |
| SC1404ISSTR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Mobile Multi-Output PWM Controller with Virtual Current SenseTM |
| SC1404ITSTR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Mobile Multi-Output PWM Controller with Virtual Current SenseTM |
| SC1405 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:HIGH SPEED SYNCHRONOUS POWER MOSFET SMART DRIVER |
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