PWM Controllers
  • SC418
    • DC-DC Buck PWM Controller with Programmable LDO
  • SC419
    • Single Phase DC-DC Converter with Integrated Boost Diode
  • SC454
    • Single-Phase Single Chip IMVP-6/6+ Vcore Power Supply
  • SC493
    • Step-down Controller with I2C Interface
  • SC561
    • Dual Output Low Noise LDO Linear Regulator
  • SC810
    • Single Input/Single Mode Single-cell Li-ion Battery Charger
  • SCDAS4F
    • Standard Recovery, High Current Center Tap and Doubler Rectifier Assemblies
Semtech SC4603

Semtech SC4603

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

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.

C-SIM Design Simulation Tool
Create design now

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