LMR12020: Not a correct voltage output

Lach Temelkov

Part Number: LMR12020

Hi,

MR12020 was designed to take 12Vin and output 10V out @ 0.5A. Not sure the picture is visible

We measured Vin = 11.96V, VEN = 11.5Vm VFB=0.34(clearly not working) and Vout = 3.49V

All components measure correctly. Circuit simulated in Webench- no problem

0 Zixu Wang over 1 year ago

Hi Lach,

Could you please share waveforms of SW, FB voltage and inductor current(optional)?

Zixu

+1 Lach Temelkov over 1 year ago in reply to Zixu Wang

Hi Zixu,

As per data sheet 10-15mA is required to start regulating. I added the minimum load and it is fine now.

Thanks,

Lach

0 Nancy Zhang over 1 year ago in reply to Lach Temelkov

Hi Lach,

Thanks for letting us know. I will close this post.

Thanks,

Nancy

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