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LMR12010: Deriving VBoost from Vout; is this correct?

Part Number: LMR12010


I am using the LMR12010 to generate 5V at 1A from a 8V - 16V supply and would like to make sure I have understood the datasheet correctly in regards to generating Vboost. There are multiple options for this, but since the output voltage in  my case is 5V can I simply use a regular diode between the output and Vboost as per the schematic below? I believe this is within the recommended operating conditions for Vboost but would like a quick sanity check first!

  • Hi Angus,

    Yes, you can connect a diode from 5V output to supply Vboot. The schematic looks ok. But the output inductor is 15uH. It is kind of larger for 1.6MHz switching frequency and may cause slow load transient response. You may reduce to lower value such as 3.3uH based on your ripple requirement.

    Hope this helps,

    Thanks,

    Nancy