Post Go back to editing

LTC3639 min load requirements

Category: Hardware
Product Number: LTC3639

Hi,

I am planning to use the LTC3639 in a high Vin 150V, 3.3V output application where the output load is fairly light. I noticed on the user manual for the demo board for this part (DC1901A) on the 3.3V efficiency curve, the output only starts at 10mA if Vin is 120V. I noticed that when Vin is lower (eg 30%), the efficiency curve starts at 0mA output load. Is there a min output loading requirement on this part when Vin get to a high voltage level?

Thanks