AAT1112 データシートの表示（PDF） - Advanced Analogic Technologies

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AAT1112

1.5A, 1.4MHz Step-Down Converter

Advanced Analogic Technologies 

SwitchRegTM

PRODUCT DATASHEET

AAT1112

1.5A, 1.4MHz Step-Down Converter

Pin Descriptions

Pin #

TSOPJW-12 TDFN33-12

1

12

2

11

3

10

4

9

5

6

7

8, 9, 10, 11

12

N/A

8

7

6

4, 5

1, 2, 3

EP

Symbol

LX

VP

N/C

MODE/SYNC

EN

VIN

FB

GND

PGND

Function

Switching node. Connect the output inductor to this pin. The switching node is inter-

nally connected to the drain of both high- and low-side MOSFETs.

Input voltage for the power switches.

Not connected.

Connect to ground for PFM/PWM mode and optimized efficiency throughout the load

range. Connect high for low noise PWM operation under all operating conditions.

Connect to an external clock for synchronization (PWM only).

Enable pin. A logic low disables the converter and it consumes less than 1μA of cur-

rent. When connected high, it resumes normal operation.

Power supply. Supplies power for the internal circuitry.

Feedback input pin. This pin is connected either directly to the converter output or

to an external resistive divider for an adjustable output.

Non-power signal ground pin.

Main power ground return pin. Connect to the output and input capacitor return.

Exposed paddle (bottom); connect to ground as closely as possible to the device.

Pin Configuration

TSOPJW-12

(Top View)

TDFN33-12

(Top View)

LX 1

VP 2

N/C 3

MODE/SYNC 4

EN 5

VIN 6

12 PGND

11 GND

10 GND

9 GND

8 GND

7 FB

PGND 1

PGND 2

PGND 3

GND 4

GND 5

FB 6

12 LX

11 VP

10 N/C

9 MODE/SYNC

8 EN

7 VIN

2

www.analogictech.com

1112.2007.11.1.2

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