RT2853A - Richtek

RT2853A Synchronous Step-Down Converter

The RT2853A/B are high-performance 650kHz 3A stepdown regulators with internal power switches and synchronous rectifiers. They feature quick transient response using their Advanced Constant On-Time (ACOTTM) control architecture that provides stable operation with small ceramic output capacitors and without complicated external compensation, among other benef.

Features

z Fast Transient Response z Steady 650kHz Switching Frequency z Enhanced Efficiency at Light Load (RT2853A) z Advanced Constant On-Time (ACOTTM) Control z Optimized for Ceramic Output Capacitors z 4.5V to 18V Input Voltage Range z Internal 110mΩ Switch and 30mΩ Synchronous Rectifier z 0.765V to 7V Adjustable Output Voltage z Externally-adjustable, Pre-biased Compatible Soft- Start z Cycle-by-Cycle Current Limit z Optional Output Discharge Function z Output Over- and Under-voltage Shut-down ` Latched (RT2853ALGQW/RT2853BLGQW Only) ` With Hiccup Mode (RT2853AHGQW/ RT2853BHGQW Only) Applications .