Switching Regulators
  • SC4525D
    • 18V, 3A, 350kHz Step-Down Switching Regulator
  • SC4525C
    • 28V 3A Step-Down Switching Regulator
  • SC4524D
    • 18V 2A Step-Down Switching Regulator
  • SC4524C
    • 28V 2A Step-Down Switching Regulator
  • SC427
    • 10A EcoSpeed® Integrated FET Regulator with Programmable LDO
  • SC417
    • 10A EcoSpeed® Integrated FET Regulator with Programmable LDO
  • SC410
    • 3A, 24V EcoSpeed® Step-Down Regulator with LDO and Ultrasonic Power Save
  • SC403B
    • 6A EcoSpeed® Integrated FET Regulator with Programmable LDO
Semtech SC4911

Semtech SC4911

Bias/Primary Side PWM Controller with Ultra-Low Start-up Current

The SC4911 is a highly integrated bias/primary side PWM controller designed for off-line or isolated dc-dc converters in telecommunication and data communication applications. The high degree of integration minimizes the amount of discrete parts needed and leads to substantial cost and space saving converter designs.

Features


  • Programmable switching frequency up to 500kHz
  • Line UVLO Protection
  • Undervoltage Lockout
  • Low startup current (45μA)
  • Cycle by cycle current limit
  • 8 pin MSOP. Available in Lead-free, fully WEEE and RoHS compliant

Applications


  • Telecom isolated converters
  • Offline isolated power supplies
  • Instrumentation power supplies
  • Battery chargers

Packaging

MSOP-8

Order Codes

  • SC4911AMSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
  • SC4911BMSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
  • SC4911IMSTR: Package Minimum Tape & Reel Only
  • SC4911IMSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only