AAT1150_06 Datasheet, PDF (1/17 Pages) Advanced Analogic Technologies – 1MHz 1A Step-Down DC/DC Converter

AAT1150
1MHz 1A Step-Down DC/DC Converter
General Description
The AAT1150 SwitchReg™ is a step-down switch-
ing converter ideal for applications where high effi-
ciency, small size, and low ripple are critical. Able
to deliver 1A with internal power MOSFETs, the
current-mode controlled IC provides high efficiency
using synchronous rectification. Fully internally
compensated, the AAT1150 simplifies system
design and lowers external parts count.
The AAT1150 is available in a Pb-free MSOP-8
package and is rated over the -40°C to +85°C tem-
perature range.
Features
SwitchReg^™
• V_IN Range: 2.7V to 5.5V
• Up to 95% Efficiency
• 110mΩ R_DS(ON) MOSFET Switch
• <1.0μA of Shutdown Current
• 1MHz Switching Frequency
• Fixed or Adjustable V_OUT: 1.0V to 4.2V
• High Initial Accuracy: ±1%
• 1.0A Peak Current
• Integrated Power Switches
• Synchronous Rectification
• Internally Compensated Current Mode Control
• Constant PWM Mode for Low Output Ripple
• Internal Soft Start
• Current Limit Protection
• Over-Temperature Protection
• MSOP-8 package
• -40°C to +85°C Temperature Range
Typical Application
INPUT
10μF
100Ω
0.1μF
Applications
• Cable/DSL Modems
• Computer Peripherals
• High Efficiency Conversion From 5V or 3.3V
Supply
• Network Cards
• Set-Top Boxes
VP
FB
AAT1150
LX
ENABLE
VCC
SGND
PGND
4.1μH
3x 22μF
OUTPUT
1150.2006.09.1.5
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