Switching Regulators
  • SC187
  • 4A, 2.2MHz Synchronous Step-Down Regulator with 15 Preset Output Voltages
  • SC195B
  • 3.5MHz, 500mA Synchronous Step Down DC-DC Regulator
  • SC220
  • 20MHz, 650mA, X-EMI™-Enabled Synchronous Step-Down Regulator
  • SC220Q
  • 20MHz, 650mA, X-EMI™-Enabled Synchronous Step-Down Regulator
  • SC2308A
  • 600kHz Step-Up Switching Regulator with 2.2A, 45V Switch
  • SC284
  • Dual Channel 2.5MHz, 1.8A Synchronous Step-Down Regulator
  • SC3102
  • 2A Synchronous Step-Down Regulator
  • SC401B
  • 15A Integrated FET Regulator with Programmable LDO
Semtech SC174

Semtech SC174

4A EcoSpeed™ Synchronous Step-Down Regulator with Optional Ultrasonic Power Save

The SC174 is an integrated, synchronous 4A EcoSpeed™ step-down regulator, which incorporates Semtech’s advanced, patented adaptive on-time architecture to achieve best-in-class performance in dynamic point-of load applications.

For 3A EcoSpeed™ Synchronous Step-Down Regulator, see SC173 product page.


  • VIN: 3V to 5.5V
  • VOUT: 0.75V to 95% x VIN
  • IOUT: Up to 4A
  • Low RDS(ON) Switches
    • Up to 95% Peak Efficiency
  • High Output Accuracy
  • Small Ceramic Capacitors
  • Power Good Pin (Open-Drain)
  • Patented Adaptive On-Time Control:
    • Excellent Transient Response
    • Programmable Pseudo-fixed Frequency
  • Fault Protection Features:
    • Cycle-by-Cycle Current Limit
    • Short Circuit Protection
    • Over and Under Output Voltage Protection
    • Over-Temperature
  • Internal Soft start
  • Ultrasonic Power Save
  • Smart Power Save
  • Ultra-Small Lead-Free 3x3mm, 10-Pin MLPD Package
  • Fully WEEE and RoHS Compliant


  • Networking Equipment, Embedded Systems
  • Medical Equipment, Office Automation
  • Instrumentation, Portable Systems
  • Consumer Devices (DTV, Set-top Box, ... )
  • 5V POL Converters


  • MLPD-10 3x3

Order Codes

  • SC174MLTRT - 3000 pcs, Tape and Reel, Lead-free, WEEE compliant and Halogen free.
  • SC174EVB: SC174 Evaluation Board