Switching Regulators
  • SC195F
  • 3.5MHz, 500mA Synchronous Step Down DC-DC Regulator
  • SC202F
  • 3.5MHz, 500mA Step-down Regulator with Integrated Inductor
  • SC21150
  • Tiny 1.2A Synchronous Buck Regulator
  • SC21152
  • Tiny 1.2A Synchronous Buck Regulator with Power Good
  • SC221
  • 20MHz, 650mA, X-EMI™-Enabled Synchronous Step-Down Regulator
  • SC284AQ
  • Dual Channel 2.5MHz, 1.7A Synchronous Buck Regulator
  • TS13101
  • Galvanic Isolated Latching 60V Power Load Switch
  • TS30011
  • High Efficiency 1A Current-Mode Synchronous Buck DC/DC Converter, 1MHz
Semtech SC4901

Semtech SC4901

Combi-Sync™ Secondary-Side Synchronous Rectifier and Regulator

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  • 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


  • 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



Order Codes

  • SC4901ITSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
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