Category: Hardware
Product Number: LTC3372
Hello;
I am using LTC3372 for generating 5V/6A and 3.3V/2A from 26V Supply. When I connect Load on 3.3V of 0.4A , I see 5V Supply falling and if the load on 3.3V increased more than 1A the 5V Supply goes as low as 4V. What I see is as load is increased then at one point switching frequency of HV reduces drastically as shown in below image. It seems to be noise issue on control signals such as ITH pin /RT Pin etc. Could you please provide incite on why this might be happening. Please find the image of high side MOSFET Gate drive Pin (Green Colour waveform) in below image:
