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
  • SC1176
  • Dual Synchronous Voltage-Mode Controller with Current-Sharing Circuitry
Semtech SC1175

Semtech SC1175

Low-Power Dual Synchronous DC/DC Controller with Current-Sharing Circuitry

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The SC1175 is a versatile 2 phase, synchronous, voltage mode PWM controller that may be used in two distinct ways. First, the SC1175 is ideal for applications where point of use output power exceeds any single input power budget. Alternatively, the SC1175 can be used as a dual switcher.

Features


  • 300 kHz fixed frequency operation
  • Soft start and enable function
  • Power-good output provided
  • Over-current protection with 50% fold-back
  • Phase-shifted switchers minimize ripple
  • High-efficiency operation, >90%
  • Programmable output(s) as low as 1.25 V
  • Industrial temperature range
  • 20-pin SOIC or TSSOP package
  • Two-Phase, Current-Sharing Controller
  • Flexible, same or separate VINProgrammable current sharing
  • Combined current limit with fold-back
  • 2 phases operating opposed for ripple reduction
  • Thermal distribution via multi-phase output
  • Two Independent PWM Controllers
  • Flexible, same or separate VIN
  • Independent control for each channel
  • Independent and separate current limit
  • 2 phases operating opposed for ripple reduction (if same IN used)

Applications


  • Graphics cards
  • DDR memory
  • Peripheral add-in card
  • SSTL termination
  • Dual-phase power supply
  • Power supplies requiring two outputs

Packaging

SOIC-20, TSSOP-20

Order Codes

  • SC1175CSWTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
  • SC1175TSTR: Package Minimum Tape & Reel Only
  • SC1175TSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
 
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