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器件描述：1MHz 2.5A Step-Down DC/DC Converter
器件厂商：ANALOGICTECH [Advanced Analogic Technologies]
厂商主页：http://www.analogictech.com/
文件大小：389.83KB
文件页数：17
PDF阅读：AAT1155IKS-1.8-T1.pdf (点击阅读器件资料)
摘要：
SwitchReg
?
AAT1155
1MHz 2.5A Step-Down DC/DC Converter
1155.2005.11.1.6 1
General Description
The AAT1155 SwitchReg? is a member of
AnalogicTech's Total Power Management IC?
(TPMIC?) 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
? 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 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
Applications
? Cable/DSL Modems
? Computer Peripherals
? High Efficiency Conversion from 5V or 3.3V
Supply
? Network Cards
? Set-Top Boxes
Typical Application
OUTPUT
1.5?H
120?F
LX
LX
VP
FB
GND
AAT1155
VCC
ENABLE
10?F
0.1?F
100?
INPUT
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