LM2735: Switching Frequency Foldback at current limit

Hi Jasper,

Thank you for your reply.

In the customer's condition, Vin=5V, Vout=12V and Iout=300mA

the circuit did not start up correctly with 300mA load.

Could you please see attached SWpin waveform.

The circuit does not boost and switching frequency is 1.179MHz, not 1.6MHz.

I think some current limit problem happened.

On the other hand, the circuit could start up whtiout load.

Then connected the load, the circuit could output 12V.

Could you please let me know what is the problem.

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I appreciate your great help.

Best regards,

Shinichi

Hi Jasper,

Thank you for your reply.

I'll confirm with the customer and then feedback to you.

I appreciate your great help.

Best regards,

Shinichi