PRODUCT DATASHEET
AAT1
154
SwitchReg
TM
General Description
The AAT1154 SwitchReg is a step-down switching con-
verter ideal for applications where high efficiency, small
size, and low ripple are critical. Able to deliver 3A with
an internal power MOSFET, the current-mode controlled
IC provides high efficiency. Fully internally compensated,
the AAT1154 simplifies system design and lowers exter-
nal parts count.
The AAT1154 is available in a Pb-free SOP-8 package and
is rated over the -40°C to +85°C temperature range.
1MHz 3A Step-Down DC/DC Converter
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
V
IN
Range: 2.7V to 5.5V
Fixed or Adjustable V
OUT
: 1.0V to 4.2V
3A Output Current
Up to 95% Efficiency
Integrated Low On Resistance Power Switch
Internally Compensated Current Mode Control
1MHz Switching Frequency
Constant Pulse Width Modulation (PWM) Mode
Low Output Ripple With Light Load
Internal Soft Start
Current Limit Protection
Over-Temperature Protection
SOP-8 Package
-40°C to +85°C Temperature Range
Applications
•
•
•
•
•
Cable/DSL Modems
Computer Peripherals
High Efficiency Conversion from 5V or 3.3V Supply
Network Cards
Set-Top Boxes
Typical Application
INPUT
10μF
100Ω
VP
FB
AAT1154
1.5μH
VCC
LX
EN
0.1μF
GND
120μF
OUTPUT
1154.2007.11.1.7
www.analogictech.com
1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
