LM76002: About Light Load Operation

Hi,

Unfortunately, i do not think we have data similar to the figure 35 on LM43602 datasheet. Is there any specific reason for the data?
On LM76002, there is an option to keep constant frequency at all load by pulling the SYNC pin high to VCC. Therefore the frequency will be your set frequency at all load except during dropout or minimum on time.

Thanks
-Arief

Dear Arief,

Thank you very much for your response.

For their products, efficiency at light load is very important.
I would suggest them to use PFM mode.
However, their products contain voice features, so the frequency must not be audible in any load condition at PFM.
Therefore, we need data like LM 43602 Figure 35.

Thank you.

Mayumi

Let me ask the application engineer for this part

Thanks
-Arief

Hi,

I have contacted the application engineer for this part and he mentioned we do not have the data for the part and that we cannot guarantee the operation frequency at PFM not be in the audible frequency range

Thanks
-Arief

Dear Arief,

Thank you for your reply.

My customers also understand that the results are not guaranteed.
If so, is it possible to measure the "frequency-light load current" characteristic on the customer's condition?
I really appreciate if you can measure it.

Thank you very much.

Mayumi