SC1176: Dual Synchronous Voltage-Mode Controller with Current-Sharing Circuitry

 The SC1176 is a versatile 2 phase, synchronous, voltage mode PWM controller that may be used in two distinct ways. First, the SC1176 is ideal for applications where point of use output power exceeds any single input power budget.


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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 .9 V
  • Industrial temperature range
  • SOIC-20 or TSSOP-20 pin Lead free package. This product is fully WEEE and RoHS compliant
Two Phase, Current Sharing Controller
  • Flexible, same or separate VIN
  • Programmable 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 VIN used)

Diagrams

Typical Application Circuit

SC1176 - Typical Application Circuit

Click diagram to enlarge

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
  • SC1176ASWTR: Package Minimum Tape & Reel Only
  • SC1176ASWTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
  • SC1176ATSTR: Package Minimum Tape & Reel Only
  • SC1176CSWTR: Package Minimum Tape & Reel Only
  • SC1176TSTR: Package Minimum Tape & Reel Only
  • SC1176TSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
Order Sample Button
Pb-Free/RoHS/WEEE Status

Related Documents

Datasheets