PWM Controllers
  • SC461
    • 28V EcoSpeed® DC-DC Buck Controller with Integrated LDO and Hiccup Restart
  • SC508
    • 46V EcoSpeed® DC-DC Buck Controller with Integrated LDO
  • SC508A
    • 46V EcoSpeed® DC-DC Buck Controller with Integrated LDO, AEC-Q100 Qualified
  • SC531
    • Triple Low-side FET Driver with Digitally Controlled Current Limit
  • 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
Semtech SC2446

Semtech SC2446

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

Features


  • 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

Applications


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

Packaging

TSSOP-28-EDP

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