ADP2108

Rev. A | Page 5 of 16

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

VIN

GND

SW

EN

FB

TOP VIEW

(BALL SIDE DOWN)

Not to Scale

1

A

B

C

2

BALL A1

INDICATOR

Figure 2. Pin Configuration

Table 4. Pin Function Descriptions

Pin No.

Mnemonic

Description

A1

VIN

Power Source Input. VIN is the source of the PFET high-side switch. Bypass VIN to GND with a 2.2 μF or greater

capacitor as close to the ADP2108 as possible.

A2

GND

Ground. Connect all the input and output capacitors to GND.

B

SW

Switch Node Output. SW is the drain of the PFET switch and NFET synchronous rectifier.

C1

EN

Enable Input. Drive EN high to turn on the ADP2108. Drive EN low to turn it off and reduce the input current to 0.2 μA.

C2

FB

Feedback Input of the Error Amplifier. Connect FB to the output of the switching regulator.