AAT1121 データシートの表示（PDF） - Analog Technology Inc

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AAT1121

1.5MHz, 250mA Step-Down Converter

Analog Technology Inc 

AAT1121

1.5MHz, 250mA Step-Down Converter

Pin Descriptions

Pin #

1

Symbol

VP

2

VIN

3

GND

4

FB

5

N/C

6

EN

7

LX

8

PGND

EP

Function

Input power pin; connected to the source of the P-channel MOSFET.

Connect to the input capacitor.

Input bias voltage for the converter.

Non-power signal ground pin.

Feedback input pin. Connect this pin to an external resistive divider for

adjustable output.

No connect.

Enable pin. A logic high enables normal operation. A logic low shuts down

the converter.

Switching node. Connect the inductor to this pin. It is connected internally to

the drain of both high- and low-side MOSFETs.

Input power return pin; connected to the source of the N-channel MOSFET.

Connect to the output and input capacitor return.

Exposed paddle (bottom): connect to ground directly beneath the package.

Pin Configuration

TDFN22-8

(Top View)

VP 1

VIN 2

GND 3

FB 4

8 PGND

7 LX

6 EN

5 N/C

2

1121.2006.04.1.0

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