AAT1153

2A Step-Down Converter

PRODUCT DATASHEET

2

1153.2008.02.1.2

www .analogictech.com

AAT1153

2A Step-Down Converter

PRODUCT DATASHEET

2

1153.2008.02.1.2

www .analogictech.com

Pin Descriptions

Pin #

Symbol

Function

1EN

Enable pin. Active high. In shutdown, all functions are disabled drawing <1μA supply current. Do not leave

EN floating.

2

IN

Power supply input pin. Must be closely decoupled to AGND with a 2.2μF or greater ceramic capacitor.

3

AIN

Analog supply input pin. Provides bias for internal circuitry.

4, 6

AGND

Analog ground pin

5

FB/OUT

FB pin (AAT1153IDE-0.6): Adjustable version feedback input. Connect FB to the center point of the

external resistor divider. The feedback threshold voltage is 0.6V.

OUT pin (AAT1153IDE-1.8): Fixed version feedback input. Connect OUT to the output voltage, VOUT.

7, 8

LX

Switching node pin. Connect the output inductor to this pin.

9, 10

PGND

Power ground pin

EP

Power ground exposed pad. Must be connected to bare copper ground plane.

Pin Configuration

TDFN-10

(Top View)

AIN

FB/OUT

AGND

EN

IN

LX

AGND

LX

PGND

PGND

3

4

5

1

2

8

7

6

10

9

1. FB pin for the adjustable voltage version (AAT1153IDE-0.6), OUT pin for the fixed voltage version (AAT1153IDE-1.8).