ETA3001

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11

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ETA3001 Rev 1.2

PCB DESIGN GUIDELINE

In an UP case that bottom cell voltage is greater than top cell voltage, bottom cell becomes input and top

cell becomes output of the switching regulation. In a DOWN case that top cell voltage is greater than bottom

cell voltage, top cell becomes input and bottom cell becomes output. These mean parallel battery capacitors

are always output capacitor or input capacitor for regulator. So please require to locate as close as possible

to IC pins to minimize series resistance.

Please try to get the order of battery pins are BATP – BATC – BATN to make an easy battery connection.

1

2

3

4

8

7

6

5

BATP

HGATE

SW

LGATE

BATC

ISET

BIAS

BATN

ETA3001

GND

10nF

Rs

1uH

100Ω

10uF

BATP

BATC

BATN

Via

Top Layer

Bottom Layer

D

G

S

D

G

S

10uF

1uF