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AAT1151 Datasheet(PDF) 2 Page - Advanced Analogic Technologies

Part No. AAT1151
Description  850kHz 700mA Synchronous Buck DC/DC Converter
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Maker  ANALOGICTECH [Advanced Analogic Technologies]
Homepage  http://www.analogictech.com
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AAT1151 Datasheet(HTML) 2 Page - Advanced Analogic Technologies

 
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AAT1151
850kHz 700mA Synchronous
Buck DC/DC Converter
2
1151.2007.01.1.6
Pin Descriptions
Pin Configuration
MSOP-8
QFN33-16
(Top view)
(Top view)
VP
VP
VP
PGND
PGND
PGND
1
2
3
4
12
11
10
9
VCC
FB
LX
PGND
LX
VP
FB
SGND
EN
VCC
1
2
3
4
8
7
6
5
Pin #
MSOP-8
QFN33-16
Symbol
Function
1
4
FB
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 adjustable output, an
external resistive divider is connected to this pin on the 1V model.
2
5, 6
SGND
Signal ground. Connect the return of all small signal components to
this pin. (See board layout rules.)
3
7
EN
Enable input pin. A logic high enables the converter; a logic low
forces the AAT1151 into shutdown mode reducing the supply current
to less than 1μA. The pin should not be left floating.
4
9
VCC
Bias supply. Supplies power for the internal circuitry. Connect to input
power via low pass filter with decoupling to SGND.
5
10, 11, 12
VP
Input supply voltage for the converter power stage. Must be closely
decoupled to PGND.
6, 7
13, 14, 15
LX
Connect inductor to these pins. Switching node internally connected
to the drain of both high- and low-side MOSFETs.
8
1, 2, 3
PGND
Main power ground return pin. Connect to the output and input
capacitor return. (See board layout rules.)
8, 16
NC
Not internally connected.
EP
Exposed paddle (bottom); connect to PGND directly beneath package.


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