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AAT1106 fiches techniques PDF

Advanced Analogic Technologies - 600mA Step-Down Converter

Numéro de référence AAT1106
Description 600mA Step-Down Converter
Fabricant Advanced Analogic Technologies 
Logo Advanced Analogic Technologies 





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AAT1106 fiche technique
General Description
The AAT1106 SwitchReg™ is a 1.5MHz constant
frequency current mode PWM step-down convert-
er with a unique adaptive slope compensation
scheme allowing the device to operate with a lower
range of inductor values to optimize size and pro-
vide efficient operation. It is ideal for portable
equipment powered by single-cell Lithium-ion bat-
teries and is optimized for high efficiency, achiev-
www.DataSheet4U.cionmg levels up to 96%.
The AAT1106 can supply up to 600mA load current
from a 2.5V to 5.5V input voltage and the output
voltage can be regulated as low as 0.6V. The
device also can run at 100% duty cycle for low
dropout operation, extending battery life in portable
systems. In addition, light load operation provides
very low output ripple for noise sensitive applica-
tions and the 1.5MHz switching frequency mini-
mizes the size of external components while keep-
ing switching losses low.
The AAT1106 is available in adjustable and fixed
(1.5V, 1.8V) output voltage versions, comes in a
Pb-free, low-profile 5-pin TSOT23 package, and is
rated over the -40°C to +85°C temperature range.
AAT1106
600mA Step-Down Converter
Features
SwitchReg
• VIN Range: 2.5V to 5.5V
• VOUT: Adjustable 0.6V to VIN
• Up to 600mA Output Current
• Up to 96% Efficiency
• 1.5MHz Switching Frequency
• 100% Duty Cycle Dropout Operation
• Adaptive Slope Compensated Current Mode
Control for Excellent Line and Load Transient
Response
• <1µA Shutdown Current
• Short-Circuit and Thermal Fault Protection
• TSOT23-5 Package
• -40°C to +85°C Temperature Range
Applications
• Cellular Phones, Smartphones
• Digital Still Cameras
• Digital Video Cameras
• Microprocessor and DSP Core Supplies
• MP3 and Portable Media Players
• PDAs
• Wireless and DSL Modems
Typical Application
VIN
2.5V to 5.5V
C1
4.7µF
IN LX
AAT1106-1.8
EN OUT
GND
L1
2.2µH
VOUT
1.8V
C3
10µF
1106.2007.07.1.0
1

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