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器件描述：850kHz 1A Synchronous Buck DC/DC Converter
器件厂商：ANALOGICTECH [Advanced Analogic Technologies]
厂商主页：http://www.analogictech.com/
文件大小：335.29KB
文件页数：18
PDF阅读：AAT1152IKS-3.0-T1.pdf (点击阅读器件资料)
摘要：
SwitchReg
?
AAT1152
850kHz 1A Synchronous Buck DC/DC Converter
Preliminary Information
1152.2003.01.0.9 1
General Description
The AAT1152 SwitchReg? is a member of
AnalogicTech?'s Total Power Management? IC
product family. The Step-down switching converter
is ideal for applications where high efficiency, small
size, and low ripple are critical. Able to deliver 1A
with internal Power MOSFETs, the current-mode
controlled IC provides high efficiency using syn-
chronous rectification. Fully internally compensat-
ed, the AAT1152 simplifies system design and low-
ers external part count.
The AAT1152 features a Power Good (POK) func-
tion which monitors the output, alerting the system
if the output voltage falls out of regulation.
The AAT1152 is available in MSOP-8 package,
rated over -40 to 85°C.
Features
? 5.5V max supply input
? Fixed output voltage: 1.1V–4.2V with 100 mV
increment
? 1A output current
? Integrated low on resistance power switches
? Synchronous rectification
? Up to 95% efficiency
? Power Good signal
? Internally compensated current mode control
? High initial accuracy: ±1%
? 850kHz switching frequency
? Constant PWM mode
? Low output ripple with light load
? Internal softstart
? Current limit protection
? Over-Temperature protection
? MSOP-8 package
Applications
? Computer Peripherals
? Set Top Boxes
? Network Cards
? Cable/DSL Modems
? High efficiency conversion from 5V or 3.3V
supply
Typical Application
OUTPUT
4.1?H
47?F
10?F
0.1?F
100?
LX
100k
VP
INPUT
FB
SGND
AAT1152
ENABLE
POK
V
CC
PGND
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