Boost Converter with USB Power Switch
Pin Descriptions
Pin #
TSOPJW-12
TDFN34-16
AAT1275
Symbol
LIN
IN
PGND
SW
OUT1
OUT2
SET
FLT
FB
GND
VCC
EN
Function
Switched power input. Connect an inductor between this pin and the SW pin.
Supply input.
Power ground.
Switch pin. Boost inductor is connected between SW and LIN.
Boost converter output.
Load switch output.
Load switch current limit programming pin. Connect a set resistor between
this pin and ground.
Load switch over-current or over-temperature fault flag. Active low, open-
drain output. A 10kΩ external pull-up resistor is recommended.
Boost converter voltage feedback pin.
Ground.
Bias supply for the internal circuitry.
Enable pin, active high.
Exposed paddle (bottom); connect to ground directly beneath the package.
1
2
3
4
5
6
7
8
9
10
11
12
1, 16
3, 15
13, 14
11, 12
10
9
8
7
6
5
4
2
EP
Pin Configuration
TSOPJW-12
(Top View)
TDFN34-16
(Top View)
LIN
IN
PGND
SW
OUT1
OUT2
1
2
3
4
5
6
12
11
10
9
8
7
EN
VCC
GND
FB
FLT
SET
LIN
EN
IN
VCC
GND
FB
FLT
SET
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
LIN
IN
PGND
PGND
SW
SW
OUT1
OUT2
2
1275.2007.01.1.3
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
