Part Number:LM5165
Tool/software: WEBENCH® Design Tools
Dear Sir/Madam,
We are using a 3.3 Volts to 2.44 Volts LM5165 DC-DC converter in COT mode (RT resistor at 48.7 K) and a target switching frequency of 313 KHz at 100 mA load.
It appears that the switching frequency is far less than the programmed value by RT resistor with 70 KHz leading to an efficiency of 75% instead of 94% - which is a big drop in performance by 19%.
The 94% efficiency comes from Webench simulations with the same RT resistor and using the same schematics.
The loss in performance of about 20% is across the whole load operation from 1mA to 100 mA with lower than expected and simulated frequency of operation.
Can you advise, please?
We look forward to hearing from you soon.
Yours faithfully,