SC1403 Datasheet PDF | Semtech Corporation

Semtech Corporation SC1403

The SC1403 is a multiple-output power supply controller designed to power battery operated systems. The SC1403 provides synchronous rectified buck converter control for two (3.3 V and 5 V) power supplies. The SC1403 uses Semtech’s proprietary Virtual Current SenseTM 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.

Part No.	SC1403
Datasheet	SC1403 Download
Manufacturer	Semtech Corporation
Description	Mobile Multi-Output PWM Controller
Buy	Stock & Price

DESCRIPTION

An efficiency of 95% can be achieved for the two supplies. The SC1403 also provides a linear regulator for system housekeeping. The 5 V linear regulator takes its input from the battery; for efficiency, the output is switched to the 5V output when available. 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 oscillator 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. skipping mode for high efficiency at light load, or fixed frequency mode for low noise operation. SC1403 PRELIMINARY

FEATURES

3.3V and 5V dual synchronous outputs, resistor programmable to 2.5V Fixed frequency or PSAVE for maximum efficiency over wide load current range 5V / 50mA linear regulator TM Virtual Current Sense for enhanced stability Accurate...