The STMicroelectronics DC-DC buck converter based on the L3751 controller is a synchronous buck evaluation board that features an extreme voltage conversion ratio over switching frequency. The board provides a regulated 5 V output at 230 kHz switching frequency. The output voltage can be easily set to 12 V using a jumper connector. Different voltage output can be selected by changing a resistor to a lower VIN range. 6 to 75 V wide input voltage range
230 kHz switching frequency setting
Synchronization from 185 to 345 kHz
Current sensing on rds-on low-side
Improved line-transient response
Input voltage undervoltage lockout
Internal voltage monitoring