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AAT1184

High Voltage Step-Down Regulator

DATA SHEET

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

202000A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 29, 2012

General Description

The AAT1184 is a single output step-down (Buck) DC

output regulator with an integrated high side MOSFET.

The input range is 6V to 24V making it the ideal power IC

solution for consumer communications equipment oper-

ating from a low cost AC/DC adapter with 12V output.

The step-down regulator provides up to 1.2A output cur-

rent in a small package. 490kHz fixed switching fre-

quency allows small L/C filtering components.

Voltage mode control allows for optimum performance

across the entire output voltage and load range.

The controller includes programmable over-current, inte-

grated soft-start and over-temperature protection.

The AAT1184 is available in the Pb-free, low profile

12-pin TSOPJW package. The rated operating tempera-

ture range is -40C to 85C.

Features

• V

• V

• I

• Small Solution Size

• Low-Cost Non-Synchronous Solution

• Shutdown Current <35μA

• High Switching Frequency

• Voltage Mode Control

• PWM Fixed Frequency for Lowest Noise

• Over-Temperature Protection

• Internal Soft Start

• Low Profile 3x3mm TSOPJW-12 Package

• -40°C to 85°C Temperature Range

Applications

• DSL and Cable Modems

• Notebook Computers

• Satellite Set Top Box

• Wireless LAN Systems

Typical Application

C3

2.2µF

C2

0.1µF

R1

2.32K

C4

68nF

C5

220pF

C6

56pF

R2

24.3K

R4

44.2k

R5

6.04k

D1

BAS16

C8

22µF

L1

4.7µH

D2

B340A

+

C1

25µF

25V

C7

330pF

R7

499

C12

1µF

25V

V

IN

6V - 24V

EN

OS

BST

GND

TSOPJW -12

LX

RS

VL

IN

FB

COMP

AAT1184

V

OUT

5V/1.2A