AAT1151 View Datasheet(PDF) - Skyworks Solutions
Part Name
Description
Manufacturer
AAT1151 Datasheet PDF : 16 Pages
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DATA SHEET
AAT1151
850kHz 700mA Synchronous Buck DC/DC Converter
Pin Descriptions
Pin #
MSOP-8 QFN33-16
1
4
2
3
4
5
6, 7
8
5, 6
7
9
10, 11, 12
13, 14, 15
1, 2, 3
8, 16
EP
Symbol
FB
SGND
EN
VCC
VP
LX
PGND
NC
Function
Feedback input pin. This pin is connected to the converter output. It is used to set the output
of the converter to regulate to the desired value via an internal resistive divider. For an ad-
justable output, an external resistive divider is connected to this pin on the 1V model.
Signal ground. Connect the return of all small signal components to this pin. (See board lay-
out rules.)
Enable input pin. A logic high enables the converter; a logic low forces the AAT1151 into shut-
down mode reducing the supply current to less than 1μA. The pin should not be left floating.
Bias supply. Supplies power for the internal circuitry. Connect to input power via low pass
filter with decoupling to SGND.
Input supply voltage for the converter power stage. Must be closely decoupled to PGND.
Connect inductor to these pins. Switching node internally connected to the drain of both high-
and low-side MOSFETs.
Main power ground return pin. Connect to the output and input capacitor return. (See board
layout rules.)
Not internally connected.
Exposed paddle (bottom); connect to PGND directly beneath package
Pin Configuration
MSOP-8
(Top View)
QFN33-16
(Top View)
FB 1
SGND 2
EN 3
VCC 4
8 PGND
7 LX
6 LX
5 VP
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 • sales@skyworksinc.com • www.skyworksinc.com
2
201991B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 18, 2013
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