It’s aim is to allow 48V to 3V (or 5v) conversion at over 2MHz to avoid interference with AM radio bands.
“To meet these market needs for high input, low output, and high switching frequency it is necessary to shorten the switching ON time,” said Rohm. “Proprietary technology for controlling pulses in a very short time allowed Rohm to reduce the minimum on-time to 20ns.”
The integrated mosfet works up to 65V. Minimum input voltage is 12V.
Features include multiple protection circuits (see below) and AEC-Q100 qualification for automotive use.
- Input under-voltage lockout
- Input over-voltage
- Output over-voltage
- Thermal Shutdown
According to the company:
Proprietary technology for controlling pulses in a very short time allowed ROHM to reduce the minimum ON time to an unprecedented 20ns – 6x shorter than conventional solutions – enabling stable step-down operation from 48V to 3.3V at a constant switching frequency of 2MHz. In addition, current mode control provides easy phase compensation required for constant voltage output with fewer external parts, contributing to greater end-product miniaturization while reducing customer design load.
The firm will be showing the chip at APEC 2016 in Long Beach this week.