ADP5304

Data Sheet

Rev. 0 | Page 14 of 17

INPUT CAPACITOR

An input capacitor is required to reduce the input voltage

ripple, input ripple current, and source impedance. Place the

input capacitor as close as possible to the PVIN pin. A low ESR

X7R or X5R capacitor is highly recommended to minimize the

input voltage ripple.

Use the following equation to determine the rms input current:



IN

OUT

IN

OUT

MAX

LOAD

RMS

V

V

V

V

I

I





)

(

For most applications, a 10 μF capacitor is sufficient. The input

capacitor can be increased without any limit for better input

voltage filtering.

LAYOUT RECOMMENDATIONS

Figure 27 shows the typical printed circuit board (PCB) layout

for the ADP5304.

5.7

4.6

100kΩ

0201

EN

1

MODE3

PVIN

AGND

PGND

VID

4

ADP5304

TOP VIEW

FB

5

NC

2

SW

VINOK

10

7

8

9

6

10µF

10V/XR5

0603

10µF

6.3V/XR5

0603

Figure 27. PCB Layout for the ADP5304