AAT1120 Advanced Analogic Technologies, Inc., AAT1120 Datasheet - Page 2

• Manufacturer Part Number: AAT1120
• Description: Aat1120 | 500ma Step-down Converter
• Manufacturer: Advanced Analogic Technologies, Inc.

Pin Descriptions
Pin Configuration
2
Pin #
EP
1
2
3
4
5
6
7
8
Symbol
PGND
GND
N/C
VIN
VP
EN
FB
LX
Function
Input power pin; connected to the source of the P-channel MOSFET. Connect to the input
capacitor.
Input bias voltage for the converter.
Non-power signal ground pin.
Feedback input pin. Connect this pin to an external resistive divider for adjustable output.
No connect.
Enable pin. A logic high enables normal operation. A logic low shuts down the converter.
Switching node. Connect the inductor to this pin. It is connected internally to the drain of
both high- and low-side MOSFETs.
Input power return pin; connected to the source of the N-channel MOSFET. Connect to the
output and input capacitor return.
Exposed paddle (bottom): connect to ground directly beneath the package.
GND
VIN
VP
FB
STDFN22-8
(Top View)
1
2
3
4
8
7
6
5
PGND
LX
EN
N/C
500mA Step-Down Converter
AAT1120
1120.2007.01.1.0