Place the input capacitors on the same side of the board and as close to the MIC38150 as
possible.
Keep both the PVIN and PGND connections short.
Place several vias to the ground plane close to the input capacitor ground terminal, but
not between the input capacitors and IC pins.
Use either X7R or X5R dielectric input capacitors. Do not use Y5V or Z5U type
capacitors.
Do not replace the ceramic input capacitor with any other type of capacitor. Any
type of capacitor can be placed in parallel with the input capacitor.
If a Tantalum input capacitor is placed in parallel with the input capacitor, it must be
recommended for switching regulator applications and the operating voltage must be derated
by 50%.
In “Hot-Plug” applications, a Tantalum or Electrolytic bypass capacitor must be used to
limit the overvoltage spike seen on the input supply with power is suddenly applied.
The 1 μF capacitor, which connects to the AVIN terminal, must be located right at the IC.
The AVIN terminal is very noise sensitive and placement of the capacitor is very critical.
Connections must be made with wide trace.
DS20007148A
The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.
