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 SC4603

Semtech SC4603

Very Low Input, MHz Operation, High-Efficiency Synchronous Buck

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The SC4603 is a voltage mode step down (buck) regulator controller that provides accurate high efficiency power conversion from input supply range 2.25V to 5.5V. A high level of integration reduces external component count and makes it suitable for low voltage applications where cost, size and efficiency are critical.

Features


  • BiCMOS voltage-mode PWM controller
  • 2.25 V to 5.5 V Input voltage range
  • Output voltages as low as 0.5 V
  • Sleep mode (Icc = 10 μA typ)
  • Lossless adjustable over-current protection
  • Combination pulse by pulse & hiccup mode current limit
  • High-efficiency synchronous switching
  • 0% to 100% duty cycle range
  • Synchronization to external clock
  • Asynchronous start-up
  • 1 MHz frequency of operation
  • 10-pin MSOP surface mount package

Applications


  • Distributed power architecture
  • Servers/workstations
  • Local microprocessor core power supplies
  • DSP and I/O power supplies
  • Battery-powered applications
  • Telecommunication equipment
  • Data processing applications

Packaging

MSOP-10

Order Codes

  • SC4603IMSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
 
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