AAT1151IKS-3.3-T1 AnalogicTech, AAT1151IKS-3.3-T1 Datasheet - Page 2

• Manufacturer Part Number: AAT1151IKS-3.3-T1
• Description: 850kHz 700mA Synchronous Buck DC/DC Converter
• Manufacturer: AnalogicTech

Pin Descriptions
Pin Configuration
2
MSOP-8
6, 7
1
2
3
4
5
8
SGND
Pin #
VCC
EN
FB
10, 11, 12
13, 14, 15
QFN33-16
1, 2, 3
8, 16
5, 6
EP
1
2
3
4
4
7
9
(Top view)
MSOP-8
Symbol
SGND
PGND
VCC
NC
EN
VP
FB
LX
8
7
6
5
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 adjustable 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 layout rules.)
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.
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.
850kHz 700mA Synchronous Buck DC/DC Converter
PGND
LX
VP
LX
PGND
PGND
PGND
FB
1
2
3
4
(Top view)
QFN33-16
12
11
10
9
VP
VP
VP
VCC
AAT1151
1151.2005.11.1.4