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參數資料
| 型號： | SC1404_05 |
| 廠商： | Semtech Corporation |
| 英文描述： | Differential Input, Dual, Simultaneous Sampling, 4.25 MSPS, 14-Bit, SAR ADC, 16-TSSOP, Ind Temp |
| 中文描述： | 移動多輸出PWM控制器虛擬電流SenseTM |
| 文件頁數： | 1/25頁 |
| 文件大小： | 472K |
| 代理商： | SC1404_05 |
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www.semtech.com
SC1404
Mobile Multi-Output PWM Controller
with Virtual Current Sense
TM
POWER MANAGEMENT
Description
Features
6 to 30V input range (operation possible below 6V)
3.3V and 5V dual synchronous outputs
Fixed-frequency or PSAVE for maximum efficiency over
wide load current range
5V/50mA linear regulator
12V/200mA linear regulator
Virtual Current Sense
Accurate low-loss current limiting
Out-of-phase switching reduces input capacitance
External compensation supports wide range of
output filter components for reduced cost
Programmable power-up sequence
Power Good output
Output overvoltage & overcurrent protection with output
undervoltage shutdown
4μA typical shutdown current
6mW typical quiescent power
Applications
Typical Application Circuit
The SC1404 is a multiple-output power supply controller designed
for battery operated systems. The SC1404 provides synchronous
rectified buck converter control for two power supplies. An effi-
ciency of 95% can be achieved. The SC1404 uses Semtech’s
proprietary Virtual Current Sense
TM
technology along with external
error amplifier compensation to achieve enhanced stability and
DC accuracy over a wide range of output filter components while
maintaining fixed frequency operation. The SC1404 also pro-
vides two linear regulators for system housekeeping. The 5V lin-
ear regulator takes its input from the battery; for efficiency, the
output is switched to the 5V output when available. The 12V lin-
ear regulator output is generated from a coupled inductor off the
5V switching regulator.
Control functions include: power up sequencing, soft start, power-
good signaling, and frequency synchronization. Line and load
regulation is to +/-1% of the output voltage. The internal oscilla-
tor can be adjusted to 200 kHz or 300 kHz or synchronized to an
external clock. The mosfet drivers provide >1A peak drive current
for fast mosfet switching.
The SC1404 includes a PSAVE# input to select pulse skipping
mode for high efficiency at light load, or fixed frequency mode for
low noise operation.
for
enhanced stability
Notebook and Subnotebook Computers
Automotive Electronics
Desktop DC-DC Converters
Revision: May 19, 2004
相關PDF資料 |
PDF描述 |
|---|---|
| SC1404 | Mobile Multi-Output PWM Controller with Virtual Current Sense |
| SC1404ISSTR | Mobile Multi-Output PWM Controller with Virtual Current Sense |
| SC1404ITSTR | Mobile Multi-Output PWM Controller with Virtual Current Sense |
| SC1405B | HIGH SPEED SYNCHRONOUS POWER MOSFET SMART DRIVER |
| SC1405BTS.TR | High Speed Synchronous Power MOSFET Smart Driver |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 |
| SC1405B | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:HIGH SPEED SYNCHRONOUS POWER MOSFET SMART DRIVER |
| SC1405BTS.TR | 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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