MAX25254/MAX25255 8 A Synchronous Buck Converters

ADI's MAX25254 and MAX25255 are small, synchronous dual buck converters with integrated high-side and low-side switches. The ICs are designed to deliver up to 8 A per channel with input voltages from 3 V to 36 V while using only 12 μA quiescent current at no load. Voltage quality can be monitored by observing the PGOOD signals. The MAX25254 and MAX25255 can regulate the output voltage in the dropout region by running at 99% of the duty cycle, making them ideal for automotive and industrial applications.

The MAX25254 and MAX25255 offer two fixed output voltages of 5 V and 3.3 V. Four fixed frequency options allow for small external components and reduced output ripple and guarantee no AM interference. The MAX25254 and MAX25255 can enter skip mode at light loads with ultra-low quiescent current of 12 μA at no load. They can be ordered with spread spectrum enabled for optimum EMI performance.

The MAX25255 dual-phase evaluation kit (MAX25255DUALEVKIT) provides a proven design to evaluate the MAX25254 and MAX25255 automotive 2 MHz synchronous buck converter dual-phase operation.

The EV kit is designed to deliver up to 12 A with an input voltage of 3 V to 36 V. The output voltage quality can be monitored by observing the PGOOD1 signal. The EV kit can also be used to evaluate other MAX25254 and MAX25255 variants with minimal component changes.