Pin Descriptions

Pin Configuration

TDFN33-12

(Top View)

EN1

FB1

GND

1

EN2

FB2

GND

VIN1

LX1

GND

VIN2

LX2

GND

2

3

4

5

6

12

11

10

9

8

7

Pin #

Symbol

Function

1

EN1

Enable pin for Channel 1. When connected low, it disables the channel and consumes

less than 1µA of current. When connected high, normal operation.

2

FB1

Feedback input pin for Channel 1. This pin is connected to the converter output. It is used

to see the output of the converter to regulate to the desired value via an external resistor

divider.

3, 6, 7, 10

GND

Ground.

4

EN2

Enable pin for Channel 2. When connected low, it disables the channel and consumes

less than 1µA of current. When connected high, normal operation.

5

FB2

Feedback input pin for Channel 2. This pin is connected to the converter output. It is used

to see the output of the converter to regulate to the desired value via an external resistor

divider.

8

LX2

Power switching node for Channel 2. Output switching node that connects to the output

inductor.

9

VIN2

Input supply voltage for Channel 2. Must be closely decoupled.

11

LX1

Power switching node for Channel 2. Output switching node that connects to the output

inductor.

12

VIN1

Input supply voltage for Channel 1. Must be closely decoupled.

AAT2512

Dual 400mA High Frequency Buck Converter

2

2512.2006.06.1.4