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 SC4905B

Semtech SC4905B

High-Performance Voltage-Mode PWM Controller

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The SC4905A/B is a 10 pin BICMOS primary side voltage mode controller for use in Isolated DC-DC and off-line switching power supplies.


  • Operation to 1 MHz
  • Accurate programmable maximum duty cycle
  • Integrated oscillator/voltage feed forward compensation
  • Line voltage monitoring
  • External frequency synchronization
  • Bi-phase mode of operation for ripple reduction
  • Under 100 µA start-up current
  • Accessible reference voltage
  • VDD under-voltage lockout
  • -40°C to +105°C operating temperature
  • 10-lead MSOP package


  • Telecom equipment and power supplies
  • Networking power supplies
  • Power over LAN applications
  • Industrial power supplies
  • Isolated power supplies



Order Codes

  • SC4905BIMSTR: Package Minimum Tape & Reel Only
  • SC4905BIMSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
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