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
  • 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
  • TS30012
  • High Efficiency 2A Current-Mode Synchronous Buck DC/DC Converter, 1MHz
Semtech SC221

Semtech SC221

20MHz, 650mA, X-EMI™-Enabled Synchronous Step-Down Regulator

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The SC221 is a 20MHz X-EMI™(1)-enabled step-down regulator optimized for power low voltage rails from 2.7 to 5.5V input voltage. X-EMI™ inductor technology enables inductors to be drawn directly on the PC board. This technology meets or exceeds the EMI performance of chip inductors and eliminates the need for discrete inductors.


  • Patented X-EMITM Inductor Technology
    • Enables Trace Inductors in PC Board Material
    • Excellent EMI Performance
  • Efficiency up to 90%
  • 17.5μA Quiescent Current under Very Light Loads
  • Wide Input Voltage Range — 2.7V to 5.5V
  • Adjustable Output Voltage Down to 1.0V
  • Output DC Current — up to 650mA
  • High Light-load Efficiency via Automatic PSAVE Mode
  • Ultra-fast Transient Response — <1μs
  • Temperature Range — -40 to +85°C
  • Shutdown Current — 0.1μA (typical)
  • Requires Tiny 220nH Inductor
  • Requires Only 1μF of Output Capacitance
  • External Switching Frequency Synchronization
  • Protection Features Including
    • Over-Current Protection
    • Output Short-Circuit Protection
    • Thermal Shutdown Protection
  • Offered in MLPD-UT 8 Lead Packages
  • Lead-free, Halogen-free, and RoHS/WEEE Compliant


  • HDTV, Set Top Boxes, Gaming Consoles
  • POL Applications
  • White Goods


  • MLPD-UT 8 Lead package - 3,000 pcs. Tape & Reel only.

Order Codes

  • SC221ULTRT - Lead-free, halogen-free, and RoHS/WEEE compliant.
  • SC221EVB - Evaluation Board

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