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
  • SC284A
  • Dual Channel 2.5MHz, 2.0A Synchronous Buck Regulator
  • SC284AQ
  • Dual Channel 2.5MHz, 1.7A Synchronous Buck Regulator
  • TS13101
  • Galvanic Isolated Latching 60V Solid State Relay
Semtech SC21154

Semtech SC21154

Tiny 1.2A Synchronous Buck Regulator with Programmable Soft Start

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The SC21154 is an ultra high efficiency 1.2A DC/DC buck regulator available in a small MLPD package. These features make the SC21154 perfect for small form factor consumer applications where high efficiency is essential. SC21154 is an Adaptive On-Time 4MHz switching regulator at full load conditions. Under light load conditions it transitions into PFM Power Save Mode and reduces switching frequency thus saving energy. High switching frequency operation allows the use of a very small 0.47μH inductor along with small input and output capacitors to minimize overall circuit size.


  • Input voltage range — 2.3V to 5.5V
  • 1.2A continuous output current
  • 4MHz switching frequency
  • Adjustable Output Voltage
  • 1% output voltage accuracy
  • Adaptive On-Time architecture
  • Up to 100% duty cycle
  • Up to 96% peak efficiency
  • Power Save mode for efficient light load operation
  • >90% efficiency 30mA to 75mA
  • 0.1μA shutdown current
  • 21μA quiescent current
  • Programmable soft start
  • Pre-bias startup protection
  • 1.5mm x 2mm, 6-Lead MLPD package
  • WEEE and RoHS compliant and halogen-free


  • Tablet PCs
  • GPS devices
  • Battery powered equipment
  • Portable devices
  • Smart Phones
  • Wearable Electronics


  • Small 6-Lead 1.5mm x 2mm MLPD package

Order Codes

  • SC21154AULTRC
    • Lead-free packaging only.
    • Device is WEEE and RoHS compliant and halogen-free
    • 3,000 pcs (tape and reel)
  • SC21154EVB
    • Evaluation Board
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