RT9451 datasheet(36/37 Pages) RICHTEK

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RT9451

DS9451-00

September 2013

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

Layout Considerations

Place the input and output capacitors as close to the input

and output pins as possible.

Keep the main power traces as wide and short as

possible.

The output inductor and bootstrap capacitor should be

placed close to the chip and LX pins.

To optimize current sense accuracy, connect the traces

to RSENSE with Kelvin sense connection.

Figure 10. PCB Layout Guide

VIN

PGND

VIO

INT

VDDP

GND

BOOT

MID_LDO

10 11 12 13

31 30 29 28

GND

To System

To Battery

GND

To optimize current and

voltage sense accuracy,

connect the traces to pins

with Kelvin sense connection.

Keep the main power

traces as wide and

short as possible.

Keep the main power traces

as wide and short as possible.

The output inductor and bootstrap capacitor

should be placed close to the chip And LX pins.

Keep the main power traces

as wide and short as possible.

Place the input and

output capacitors as

close to the input

and output pins as

possible.

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