SC4901: Combi-Sync™ Secondary-Side Synchronous Rectifier and Regulator

Single controller performs synchronous rectification and post regulation
Independent regulation of multiple outputs from a common secondary winding
Turn-on shoot-through inherently eliminated
Primary switch turns ON and OFF with zero current
No synchronizing or any other signals needed across the isolation boundary
Eliminates the need for a secondary bias supply
Independent soft start, ON/OFF, remote sense and current limit for each output
Resistive or inductive current sensing with 2 V current signal and 2.5 V reference for external applications
4.5 V to 18 V operation
Max. operating frequency to 1 MHz
Low-profile 16-pin TSSOP package
Based on Semtech’s patent-pending Combi-Sync™ concept

Click diagram to enlarge

Telecom isolated DC-to-DC converters with multiple low-voltage outputs
High-density brick and sub-brick modules with independently regulated multiple outputs
Distributed power architectures
Isolated VRMs