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 SC4508A

Semtech SC4508A

Buck or Buck-Boost (Inverting) Current-Mode Controller

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The SC4508A is a low voltage current mode switching regulator controller that drives a P-channel power MOSFET with programmable switching frequency. It can be configured in either buck or buck boost (inverting) converters.


  • Wide input voltage range 2.7V to 15V
  • Programmable output voltage
  • Programmable switching frequency up to 1.5MHz
  • Buck or buck boost (inverting) configuration
  • Current mode control with slope compensation
  • Very low quiescent current in shutdown mode
  • Accessible reference voltage
  • Hiccup mode after 32 cycle-by-cycle OCP
  • 4mm x 4mm MLPQ-12 lead free package. This product is fully WEEE and RoHS compliant


  • Low power point of use converters
  • Single or multiple output low power converters
  • Positive and/or negative output voltage
  • DSL cards
  • Graphic cards
  • I/O cards
  • Negative bias supplies



Order Codes

  • SC4508AMLTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
  • SC4508ABUCKEVB: SC4508A Evaluation Board
  • SC4508ABUCK-BOOSTEVB: SC4508A Evaluation Board
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