PRODUCT DATASHEET
AAT1218
TM
SwitchReg
1A, 1.2MHz Synchronous Boost Converter
Pin Description
Pin #
TDFN33-12
TSOPJW-12
Symbol Description
Switching node tied to drain of internal N-channel MOSFET and source of internal
P-channel MOSFET. Connect this pin to the external power inductor.
1
12
LX
2, 5
3
4
8, 11
10
9
NC
VIN
EN
No connect.
Input voltage for the controller.
Input enable pin.
6, 7
GND
Non-power signal ground pin.
Feedback input pin. This pin is connected to an external resistor divider which de-
termines the output voltage setpoint.
8
5
FB
9. 10
11, 12
3, 4
1, 2
OUT
Power ground pin. Connect this pin directly to input and output capacitors.
Output pin; connected to the positive terminal of the output capacitor and to the
external resistor divider.
PGND
Pin Configuration
TDFN33-12
(Top View)
TSOPJW-12
(Top View)
1
2
3
4
5
6
12
11
10
PGND
PGND
OUT
OUT
FB
LX
1
2
3
4
5
6
12
11
10
9
LX
N/C
VIN
EN
PGND
PGND
OUT
OUT
FB
N/C
VIN
EN
9
8
8
7
N/C
GND
N/C
GND
7
GND
GND
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1218.2008.10.1.1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
