Switching Regulators
  • SC195F
  • 3.5MHz, 500mA Synchronous Step Down DC-DC Regulator
  • SC202F
  • 3.5MHz, 500mA Step-down Regulator with Integrated Inductor
  • 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
  • TS30012
  • High Efficiency 2A Current-Mode Synchronous Buck DC/DC Converter, 1MHz
Semtech SC21150

Semtech SC21150

Tiny 1.2A Synchronous Buck Regulator

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The SC21150 is an ultra high efficiency 1.2A DC/DC buck regulator available in a tiny CSP package. These features make the SC211 50 family perfect for small form factor portable applications where long battery life is essential. SC21150 is an Adaptive On-Time 4MHz switching regulator at full load conditions. Under light load conditions it seamlessly transitions into 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. A Forced PWM input allows continuous switching under all load conditions.


  • Input voltage range — 2.3V to 5.5V
  • 1.2A continuous output current
  • 4MHz switching frequency
  • Adjustable Output Voltage
    • 0.8V to VIN
  • 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
  • 1μA shutdown current
  • 23μA quiescent current
  • Pre-bias startup protection
  • Internal or optional external Soft Start
  • Device options (contact Semtech Marketing)
    • Automatic output discharge
    • Power Good indicator
    • Internal Soft Start
    • External Programmable Soft Start
    • Forced PWM Operation Input
  • 0.75mm x 1.11mm, 6-Bump WLCSP Package
  • WEEE and RoHS compliant and halogen-free


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


  • 0.75mm x 1.11mm, 6-Bump WLCSP Package, tape and reel only

Order Codes

  • SC21150ACSTRT - WEEE and RoHS compliant and halogen-free, 5,000 pcs.
  • SC21150EVB - Evaluation Board 

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