MB39C007 Datasheet, PDF (21/52 Pages) Fujitsu Component Limited. – 2 ch DC/DC Converter IC Built-in Switching FET & voltage detection function, PFM/PWM Synchronous Rectification, and Down Conversion Support

MB39C007
• Notes for circuit design
The switching operation of this IC works by monitoring and controlling the peak current which, incidentally,
serves as a form of short-circuit protection. However, do not leave the output short-circuited for long periods of
time. If the output is short-circuited where VIN < 2.9 V, the current limit value (peak current to the inductor) tends
to rise. Leaving in the short-circuit state, the temperature of this IC will continue rising and activate the thermal
protection.
Once the thermal protection stops the output, the temperature of the IC will go down and operation will be
restarted, after which the output will repeat the starting and stopping.
Although this effect will not destroy the IC, the thermal exposure to the IC over prolonged hours may affect the
peripherals surrounding it.
DS04-27246-2E
21