Data Sheet
ADP2108
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
BALL A1
INDICATOR
1
2
VIN GND
A
B
C
SW
EN
FB
TOP VIEW
(BALL SIDE DOWN)
Not to Scale
Figure 2. WLCSP Pin Configuration
Table 4. WLCSP 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
B
C1
C2
GND
SW
EN
Ground. Connect all the input and output capacitors to GND.
Switch Node Output. SW is the drain of the PFET switch and NFET synchronous rectifier.
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.
Feedback Input of the Error Amplifier. Connect FB to the output of the switching regulator.
FB
5
1
2
3
SW
VIN
GND
EN
ADP2108
TOP VIEW
(Not to Scale)
4
FB
Figure 3. TSOT Pin Configuration
Table 5. TSOT Pin Function Descriptions
Pin No. Mnemonic Description
1
VIN
Power Source Input. VIN is the source of the PFET high-side switch. Bypass VIN to GND with a 2.2 ꢀf or greater
capacitor as close to the ADP2108 as possible.
2
3
4
5
GND
EN
FB
Ground. Connect all the input and output capacitors to GND.
Enable Input. Drive EN high to turn on the ADP2108. Drive EN low to turn it off and reduce the input current to 0.1 ꢀA.
Feedback Input of the Error Amplifier. Connect FB to the output of the switching regulator.
Switch Node Output. SW is the drain of the PFET switch and NFET synchronous rectifier.
SW
Rev. G | Page 5 of 20