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器件描述：600mA, 1MHz Step-Down Converter
器件厂商：ANALOGICTECH [Advanced Analogic Technologies]
厂商主页：http://www.analogictech.com/
文件大小：554.27KB
文件页数：20
PDF阅读：AAT1126.pdf (点击阅读器件资料)
摘要：
AAT1126
600mA, 1MHz Step-Down Converter
1126.2006.05.1.1 1
SwitchReg
?
General Description
The AAT1126 SwitchReg? is a member of
AnalogicTech's Total Power Management IC?
(TPMIC?) product family. It is a 1MHz step-down
converter with an input voltage range of 2.7V to
5.5V and output as low as 0.6V. Its low supply cur-
rent, small size, and high switching frequency
make the AAT1126 the ideal choice for portable
applications.
The AAT1126 is available in either a fixed version
with internal feedback or a programmable version
with external feedback resistors. It can deliver up
to 600mA of load current while maintaining a low
25?A no load quiescent current. The 1MHz switch-
ing frequency minimizes the size of external com-
ponents while keeping switching losses low. The
AAT1126 feedback and control delivers excellent
load regulation and transient response with a small
output inductor and capacitor.
The AAT1126 is designed to maintain high efficien-
cy throughout the operating range and provides
fast turn-on time.
The AAT1126 is available in a Pb-free, space-sav-
ing SOT23-5 package and is rated over the -40°C
to +85°C temperature range.
Features
?V
IN
Range: 2.7V to 5.5V
?V
OUT
Adjustable Down to 0.6V
— Fixed or Adjustable Version
? Fast Turn-On Time (100?s Typical)
? 25?A No Load Quiescent Current
? Up to 97% Efficiency
? Output Current Up to 600mA
? 1MHz Switching Frequency
? Soft Start
? Over-Temperature Protection
? Current Limit Protection
? 100% Duty Cycle Low-Dropout Operation
? 0.1?A Shutdown Current
? SOT23-5 Package
? Temperature Range: -40°C to +85°C
Applications
? Cellular Phones
? Digital Cameras
? Handheld Instruments
? Microprocessor / DSP Core / IO Power
? PDAs and Handheld Computers
? USB Devices
Typical Application (Fixed Output Voltage)
4.7?H
L1
10?F
C1
4.7?F
C2
EN
2
OUT
4
VIN
5
LX
3
GND
1
AAT1126
U1
V
IN
V
O
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