AAT2148 Datasheet, PDF (2/18 Pages) Skyworks Solutions Inc. – Low-Noise, Fast Transient 1A Step-Down Converter

DATA SHEET
AAT2148
Low-Noise, Fast Transient 1A Step-Down Converter
Pin Descriptions
Pin #
1, 2, 3
4
5, 6, 8, 16
9
10, 11, 12
13, 14, 15
EP
Symbol
PGND
FB
N/C
VCC
VP
LX
Function
Power ground pin
Feedback input. This pin is connected either directly to the converter output or to an external resis-
tive divider for an adjustable output.
Not internally connected.
Bias supply. Supplies power for the internal circuitry. Connect to input power.
Input supply voltage for the converter power stage. Must be closely decoupled to GND.
Switching node. Connect the inductor to this pin. It is internally connected to the drain of both
high- and low-side MOSFETs.
Exposed paddle (bottom); connect to PGND directly beneath package.
Pin Configuration
QFN33-16
(Top View)
PGND ¹
PGND ²
PGND ³
FB ⁴
12 _VP
11 VP
10 _VP
9 _VCC
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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202009A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 28, 2012