Density: Fast Turn-Off Synchronous Rectifier
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SC3511 is a smart secondary-side synchronous rectifier. It integrates a 100V power MOSFET. SC3511 can replace Schottky diode so the system can achieve higher efficiency. The SR MOSFET is turned on when the VVD falls below turn-on threshold, and turned off when the VVD exceeds turn-off threshold. The SR conduction voltage drop is continuously monitored to minimize the conduction loss. The extremely fast turn-off comparator and driving circuitry ensures the safety of the system, even in current continuous mode (CCM) condition. This chip supports both high side rectification and low side rectification.


Typical Application Circuit 






l  No need of auxiliary winding for power supply

l  Patented programmable turn on detection circuitry

l  Extremely low quiescent current leads to low stand by power

l  Supports DCM, CCM, and Quasi-Resonant mode converters

l  Supports both high and low side synchronous rectification

l  SOP8 package available


l  Universal AC-DC Adaptors

l  USB PD and QC Chargers

l  Flyback Power Supplies with Variable Output Voltage

l  AC-DC auxiliary supplies

Technical documentation
Release date
2021 / 02 / 03
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