AAT1130

2.5MHz 500mA Step-Down DC/DC Converter

PRODUCT DATASHEET

2

1130.2008.08.1.1

www .analogictech.com

AAT1130

2.5MHz 500mA Step-Down DC/DC Converter

PRODUCT DATASHEET

2

1130.2008.08.1.1

www .analogictech.com

Pin Descriptions

Adj.

Fixed

Symbol

Function

1

n/a

FB

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)

2

2

VOUT

Output voltage feedback input. VOUT senses the output voltage. Connect VOUT to the

output voltage node to regulate the output voltage.

3

3

VCC

Input supply voltage. Connect VCC to the input supply voltage.

44

VP

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.

55

LX

Switching node. Connect the LC filter between LX and the load. LX is internally connected

to the drain of the p-channel MOSFET switch and n-channel MOSFET synchronous rectifier.

6

1

EN

Enable input. Active logic high.

n/a

6

PGND

Power ground. Connect PGND to GND at a single point as close to the AAT1130 as possible.

7, 8, 9, 10

7, 8, 9, 10

GND

Ground. For fixed 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

Fixed Output

Voltage Version

Voltage Version

1

2

3

4

5

12

11

10

9

8

FB

VOUT

VCC

VP

LX

GND

GND

GND

GND

EN

1

2

3

4

5

10

9

8

7

6

EN

VOUT

VCC

VP

LX

GND

GND

GND

GND

PGND