ADP2109 Analog Devices, ADP2109 Datasheet - Page 5

• Manufacturer Part Number: ADP2109
• Description: Compact 600 mA, 3 MHz, Step-Down Converter with Output Discharge
• Manufacturer: Analog Devices

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 5. Pin Function Descriptions
Pin No.
A1
A2
B
C1
C2
Mnemonic
VIN
GND
SW
EN
FB
Description
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 ADP2109 as possible.
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 ADP2109. Drive EN low to turn it off and reduce the input current to 0.1 μA.
Feedback Input of the Error Amplifier. Connect FB to the output of the switching regulator.
Figure 2. Pin Configuration
A
B
C
Rev. A | Page 5 of 16
(BALL SIDE DOWN)
BALL A1
INDICATOR
Not to Scale
TOP VIEW
VIN
EN
1
SW
GND
FB
2
ADP2109