Pin description and connection diagrams

PM8908

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DocID027688 Rev 3

2

Pin description and connection diagrams

Figure 4. Pin connection (top view)

Pin description

1

2

3

4

PM8908

PGND

VIN

PHASE

12

15

14

13

18

19

16

17

10

9

8

7

5

11

6

20

PGND

PGND

VIN

PHASE

PHASE

PHASE

PHASE

Table 2. Pin description

Pin

Function

No.

Name

1

PGND

Power ground connection, connected to the embedded low-side MOSFET

source. Connect to the PGND PCB plane. See Figure 1.

2

3

4

VIN

Power input voltage, connected to the embedded high-side MOS drain.

Supply range is from 1 V to 3.5 V. Bypass VIN pins to PGND pins close to the

IC package with high quality MLCC capacitors. See Figure 1.

5

6GND

All the internal references are referred to this pin. Connect to the PCB signal

ground.

7REF

Reference output.

Connect a 1

F MLCC capacitor to GND. See Figure 1.

8COMP

Error amplifier output.

9REFIN

Reference input.

Apply a voltage between 0.5 to 2.0 V. Filter with at least 0.01

F MLCC

capacitors to GND.

10

VOUT

Output voltage sense.