LMR54410: On time during PFM mode

Oba

Genius 16035 points

Part Number: LMR54410

Hello,

Could you tell me ON time during PFM mode of LMR54410(PFM option)?
Is it fixed time or decided by something?

Regards,
Oba

0 Elena Gao over 2 years ago

hi, Oba,

it has 60-ns minimum switching on time limitation, on time is fixed when Duty is fixed by Vin and Vout.

Elena

0 Oba over 2 years ago in reply to Elena Gao

Hello Elena,

Thanks for your reply.
Let me confirm. During PFM mode, is ON time fixed 60nsec?

Regards,
Oba

0 Elena Gao over 2 years ago in reply to Oba

hi, Oba,

the min on time is 60ns, it means the min turn of high side, On time in a fixed Vin and Vout is fix.

Elena

+1 Elena Gao over 2 years ago in reply to Elena Gao

hi, Oba,

Ton=Ipeak_min * L /(Vin-Vo), Ipeak_min =300mA, from datasheet Figure 9-2. is PFM waveform.

Elena

0 Oba over 2 years ago in reply to Elena Gao

Hello Elena,

Thanks, I understand.

Regards,
Oba

0 Elena Gao over 2 years ago in reply to Oba

hi, Oba,

could you please help to click Resolve, then I can close this thread.

if you have more question ,please open a new one.

Elena

0 Oba over 2 years ago in reply to Elena Gao

Hello Elena,

Sorry, I missed to do it.
I have done it.

Regards,
Oba

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