LMR51420: The switching frequency under no load

Zoey Wu

Expert 5805 points

Part Number: LMR51420

Hi team,

What is the switching frequency when working under no load, Vin: 12~26.5V, Vout: 3.3 V.

over 2 years ago

0 Ridge Lahti over 2 years ago

TI__Mastermind 21970 points

Hello,

We do not have a curve. The best way to test the switching frequency is to get an EVM from TI and measure it on the bench.

Best regards,

Ridge

0 Zoey Wu over 2 years ago in reply to Ridge Lahti

TI__Expert 5805 points

Hi Ridge,

Do we have a formula to calculate the approximate switching frequency? And does the product have a lowest switching frequency ?

0 Ridge Lahti over 2 years ago in reply to Zoey Wu

TI__Mastermind 21970 points

Hello,

What do you mean by lowest frequency? What condition are you looking for?

Best regards,

Ridge

+1 Daniel Li14 over 2 years ago in reply to Zoey Wu

TI__Mastermind 27470 points

Hi Zoey:

for PFM version, the lowest frequency can be nearly 0, and in real application case, there will be feedback resistor and power loss as load current for converter, As the frequency is portion with load, so it will be around several Khz in no load condition. You can also send me email if you have further question.

Thanks

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LMR51420: The switching frequency under no load