Dual-Phase Buck for High Voltage input

Hi,

I am looking for controller recommendations for the design of a synchronous Dual Phase Buck with sync option for Multiple Power Modules in Parallel.

Something like the ISL8126 but with external gate drivers for Higher voltage operation. 

Can you recommend something? Any reference to adapt a controller for higher voltages with an external driver? Thanks.

Basic design specifications:

Vin_max = 170V

Vout = 125V

I_phase = 50A

f_sw = 100 Khz

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