MM4039

This is a control IC that manages the charging and discharging of power backup supercapacitors in both 3.3V and 5V systems. Its function is to charge the supercapacitor while simultaneously supplying power from the input power supply to the system. In the event of a power supply failure, it seamlessly switches to backup operation, supplying power from the supercapacitor to the system. During a power outage, the IC will switch to backup operation and use power from the super capacitor to sustain the system. This allows for a safe shutdown of the microcontroller, memory, and other components.

1. Easily enables power supply backup applications using supercapacitors
2. Built-in charge pump to drive the input load switch
3. Input current distribution function that prioritizes system power supply (IINDPM function)
4. 13V input rating with input over voltage protection
5. Input overcurrent protection
6. Small package（4.0mm x 4.0mm x 0.75mm)
7. Operating ambient temperature　Ta=-40～105℃

For power backup control using supercapacitors

(Surveillance cameras, Industrial IoT equipment,
Handy Terminal for business use, Capacitor UPS, etc.)

Supercapacitor charge/discharge control IC for power supply backup

• SQFN-24A