The SE8403 device is a full-featured, synchronous PWM buck controller that operates at an input voltage between 9V and 100V and is optimized for external switch, maximum output 10A dc-dc converter applications.
The SE8403 has built-in protection features, such as current limit and short-circuit protection. When FB is lower than 0.35V, The device enters short-circuit protection mode, the SE8403 will repeatedly turn off for 120mS and on for 4mS again until the short-circuit condition is no longer present. The over current setting is programmable by setting one external resistor.
The output voltage of SE8403 is changed by using a resistor divider. the EN pin can disable SE8403.