Datasheet

Printed-Circuit Board Layout Guideline

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block currents isolated (high-power/low-power small-signal) which reduces noise-coupling and ground-

bounce issues. A single ground plane for this design gives good results. No ground-bounce issue

occurs with this small layout and a single ground plane. Having the components segregated minimizes

coupling between signals.

6. The high-current charge paths into VBUS, PMID, and from the SW pins must be sized appropriately for

the maximum charge current in order to avoid voltage drops in these traces. The PGND pins must be

connected to the ground plane to return current through the internal low-side FET.

bq24140, Fully Integrated, Dual-Input, Switch-Mode, One-Cell, Li-Ion Charger SLUU495A–October 2011–Revised September 2012

With Full USB Compliance and USB-OTG Support EVM

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