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 SC2446A

Semtech SC2446A

Not Recommended for New Designs; use SC2447

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The SC2446A is a high-frequency dual synchronous stepdown switching power supply controller. It provides out-of-phase output gate signals. The SC2446A operates in synchronous continuous-conduction mode.


  • 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
  • 50mV/-75mV maximum current sense voltage
  • Inductive 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: 4.7V to 16V
  • Individual soft-start, overload shutdown and enable
  • Duty cycle up to 88%
  • 0.5V feedback voltage for low-voltage outputs
  • External reference input for DDR applications
  • Programmable frequency up to 1MHz per phase
  • External synchronization
  • Industrial temperature range
  • 28-lead TSSOP lead free package. This product is fully WEEE and RoHS compliant


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



Order Codes

  • SC2446AITSTRT: Lead-Free, 2500 pcs per tape and reel
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