The SY21401 is a current mode DC/DC controller targeted for Boost, SEPIC, Flyback and Forward applications. The SY21401 has an accurate DC input current limit. External compensation provides flexible adjustment of control loops for different applications. The internal low side driver is capable of sourcing 1.5A and sinking 3A current.

1.05V to 5.5V 2A Load Switch

Single-channel, Adjustable Voltage Monitor in Ultra-small Package

2.5V to 16V Protection Switch with Blocking FET Control

Single-channel, Adjustable Voltage Monitor in Ultra-small Package

Ultra-Low Shutdown Current Load Switch

Single-channel, Adjustable Voltage Monitor in Ultra-small Package

Flyback Regulator with Primary Side CV/CC Control for High Input Voltage Application

3A Low Loss Power Distribution Switch

High Efficiency 300kHz, 25V Boost/SEPIC Controller with Output Current Limit