LMR16020: PWRGD PIN of LMR16020

Jackson hu

Part Number: LMR16020

Hello,

If PWRGD PIN of LMR16020 not be used, keep it to float ?

Jackson

0 Samuel Jaffe over 4 years ago

Jackson,

PGOOD can be connected to GND if it is not used.

-Sam

0 Jackson hu over 4 years ago in reply to Samuel Jaffe

Hi Sam,

Thank you for your answer.

I have updated the SCH, could you please help to check everything if OKAY for the LMR16020? Thank you.

Jackson

0 Samuel Jaffe over 4 years ago in reply to Jackson hu

Jackson,

EN resistor is not necessary. You can float this pin to enable the device.
PWRGD resistor is not necessary. You can short to GND.
The ferrite beads may resonate with the underdamped input caps. If you have high-frequency EMI concerns, you may want to add an input cap with a series resistor to damp the resonance depending on what's connected to J14.
Make sure D22 is designed for high-frequency switching.
The rest of the components look good.

-Sam

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