AAT1121IES-0.6-T1 Advanced Analog Technology, Inc., AAT1121IES-0.6-T1 Datasheet - Page 2

• Manufacturer Part Number: AAT1121IES-0.6-T1
• Description: 1.5MHz, 250mA Step-Down Converter
• Manufacturer: Advanced Analog Technology, Inc.

Pin Descriptions
Pin Configuration
2
Pin #
EP
1
2
3
4
5
6
7
8
Symbol
PGND
GND
VIN
N/C
EN
VP
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
TDFN22-8/STDFN22-8
VIN
VP
FB
(Top View)
1
2
3
4
1.5MHz, 250mA Step-Down Converter
8
7
6
5
PGND
LX
EN
N/C
AAT1121
1121.2007.03.1.2