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.

High Efficiency, 28V Input. Single Inductor Synchronous Step Up/Down Regulator

0.7V Minimum Input, Fixed Output 100mA Maximum Output Current Synchronous Boost

1.8V Minimum Input and 5. 5V Maximum Output 3A Peak Current Synchronous Boost with Output Disconnect

0.7V Minimum Input and 5.25V Maximum Output Synchronous Boost Converter

High-Efficiency, 5.5V, 2A Single Synchronous Buck Converter

36V, Boost/Flyback/Sepic Controller

2.8V-5.5V Input, 3A Single Synchronous Buck Converter

60V Synchronous Four-switch Buck-Boost Controller

60V Synchronous 4-switch Buck-Boost Controller