AAT1155_06 Datasheet, PDF (1/17 Pages) Advanced Analogic Technologies – 1MHz 2.5A Step-Down DC/DC Converter

AAT1155
1MHz 2.5A Step-Down DC/DC Converter
General Description
Features
SwitchReg^™
The AAT1155 SwitchReg is a step-down switching
converter ideal for applications where high efficien-
cy, small size, and low ripple are critical. Able to
deliver 2.5A with an internal power MOSFET, the
current-mode controlled IC provides high efficien-
cy. Fully internally compensated, the AAT1155 sim-
plifies system design and lowers external parts
count.
The AAT1155 is available in a Pb-free MSOP-8
package and is rated over the -40°C to +85°C tem-
perature range.
• 5.5V Max Supply Input
• Fixed or Adjustable V_OUT: 1.0V to 4.2V
• 2.5A Output Current
• Up to 95% Efficiency
• Integrated Low On Resistance Power
Switches
• 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
• 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
AAT1155 _LX
LX
EN
VCC
GND
1.5μH
120μF
OUTPUT
1155.2006.09.1.7
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