PWM Controllers
  • 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
  • SC1109
  • Synchronous PWM Controller With Dual Low-Dropout Regulator Controllers
  • SC1110
  • Sink and Source DC/DC Controller For Termination Power Supply Applications
  • SC1116
  • Linear FET Controller for DDR Supplies
  • SC1175
  • Low-Power Dual Synchronous DC/DC Controller with Current-Sharing Circuitry
Semtech SC493

Semtech SC493

EcoSpeed® Step-down Controller with I2C Interface

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The SC493 is a synchronous EcoSpeed® buck power supply controller. It features an I2C interface and a bootstrap switch in a space-saving MLPQ 3X3-20 pin package. The SC493 uses Semtech’s advanced patented adaptive on-time control architecture to provide excellent light load efficiency and fast transient
response with small external components.


  • Input supply voltage range — 3.0V to 28V
  • Controller supply voltage range — 3.0V to 5.5V
  • All ceramic solution enabled
  • I2C interface
  • Output voltage fine adjust control
  • Output voltage margining
  • Supports dynamic voltage transitions via the I2C interface
  • Programmable power-on delay time and soft-start time
  • EcoSpeed™ architecture with pseudo fixed-frequency adaptive on-time control
  • Switching frequency programmable up to 1MHz
  • Selectable power save, including ultrasonic
  • Non-synchronous start-up into pre-biased loads
  • Over-voltage/under-voltage fault protection
  • Smart power save
  • Power good Output
  • Smart drive™
  • Status register monitoring device operation
  • Ulrta-thin package — 3 x 3 x 0.6 (mm), 20 pin MLPQ-UT
  • Lead-free and halogen-free
  • WEEE and RoHS compliant
I2C — logo is a trademark of NXP B.V.


  • Printers
  • Computer peripherals


  • MLPQ-UT-20

Order Codes

  • SC493ULTRT
  • SC493EVB; SC493 Evaluation Board
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