Power Management
FemtoBuck™ DC-DC Regulators and Controllers

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.

Overview

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