PWM Controllers
  • SC1102
  • Synchronous Voltage-Mode Controller for Distributed Power-Supply Applications
  • SC1103
  • Asynchronous Voltage-Mode PWM Controller for 12 V Input
  • SC1104A
  • Not Recommended For New Designs
  • SC1104B
  • Simple, Synchronous Voltage-Mode PWM Controller
  • SC1109
  • Synchronous PWM Controller With Dual Low-Dropout Regulator Controllers
  • SC1110
  • Sink and Source DC/DC Controller For Termination Power Supply Applications
  • SC1116
  • Linear FET Controller for DDR Supplies
  • SC1175
  • Low-Power Dual Synchronous DC/DC Controller with Current-Sharing Circuitry
Semtech SC2446

Semtech SC2446

Dual-Phase Single or Two-Output Synchronous Step-Down Controller

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  • 2-phase synchronous continuous conduction mode for high-efficiency step-down converters
  • Out-of-phase operation for low-input current ripples
  • Output source and sink currents
  • Fixed-frequency peak current-mode control
  • 75 mV/-110 mV maximum current-sense voltage
  • Synthesized MOSFET RDS(ON) current-sensing for low-cost applications
  • Optional resistor current-sensing for precise current limit
  • Dual outputs or 2-phase single output operation
  • Excellent current sharing between individual phases
  • Wide input voltage range: 4.7 V to 16 V
  • Individual soft-start, overload shutdown and enable
  • Duty cycle up to 88%
  • 0.5 V feedback voltage for low-voltage outputs
  • External reference input for DDR applications
  • Buffered VDDQ/2 output
  • Programmable frequency up to 1 MHz per phase
  • External synchronization
  • Industrial temperature range
  • 28-lead TSSOP-EDP package


  • Telecommunication power supplies
  • DDR memory power supplies
  • Graphic power supplies
  • Servers and base stations



Order Codes

  • SC2446ITETRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
  • SC2446ITSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
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