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AAT1155 Datasheet, PDF (1/17 Pages) Advanced Analogic Technologies – 1MHz 2.5A Step-Down DC/DC Converter | |||
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AAT1155
1MHz 2.5A Step-Down DC/DC Converter
General Description
The AAT1155 SwitchReg⢠is a member of
AnalogicTech's Total Power Management ICâ¢
(TPMICâ¢) product family. The step-down switch-
ing converter is ideal for applications where high
efficiency, small size, and low ripple are critical.
Able to deliver 2.5A with an internal power MOS-
FET, the current-mode controlled IC provides high
efficiency. Fully internally compensated, the
AAT1155 simplifies 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.
Features
SwitchRegâ¢
⢠5.5V Max Supply Input
⢠Fixed or Adjustable VOUT: 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 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
100â¦
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
ENABLE
VCC
GND
1.5µH
120µF
OUTPUT
1155.2005.11.1.6
1
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