The device is marketed as "2.5V to 36V, 2.5MHz, PWM Boost Controller" but it does not turn on with any voltage below 4.2V
The MAX17290/MAX17292 high-efficiency, synchronous step-up DC-DC controllers…
To synchronize the converter with an external clock, connect a logic signal in the range 1000kHz to 2500kHz to the FSET/SYNC input. The external nMOSFET is turned on (i.e., DRV goes high) after a short…
