PRODUCT DATASHEET
AAT1130
SwitchReg
TM
Pin Descriptions
Adj.
1
2
3
4
5
6
n/a
7, 8, 9, 10
2.5MHz 500mA Step-Down DC/DC Converter
Fixed
n/a
2
3
4
5
1
6
7, 8, 9, 10
Symbol
FB
VOUT
VCC
VP
LX
EN
PGND
GND
Function
Output voltage feedback input. FB senses the output voltage through a resistor voltage
divider circuit. Connect the voltage divider from the output voltage to FB. The feedback
threshold is 0.6V. (Adjustable output voltage versions only)
Output voltage feedback input. VOUT senses the output voltage. Connect VOUT to the
output voltage node to regulate the output voltage.
Input supply voltage. Connect VCC to the input supply voltage.
Power input supply voltage. Connect VP to the VCC pin, and to the input supply voltage.
Bypass VP to PGND with a 2.2μF or greater capacitor.
Switching node. Connect the LC
fi
lter between LX and the load. LX is internally connected
to the drain of the p-channel MOSFET switch and n-channel MOSFET synchronous rectifier.
Enable input. Active logic high.
Power ground. Connect PGND to GND at a single point as close to the AAT1130 as possible.
Ground. For
fi
xed version, connect GND to PGND at a single point as close to the
AAT1130-xx as possible.
Pin Configuration
SC70JW-10
(Top View)
Adjustable Output
Voltage Version
Fixed Output
Voltage Version
FB
VOUT
VCC
VP
LX
1
2
3
4
5
12
11
10
9
8
GND
GND
GND
GND
EN
EN
VOUT
VCC
VP
LX
1
2
3
4
5
10
9
8
7
6
GND
GND
GND
GND
PGND
2
www.analogictech.com
1130.2008.08.1.1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
