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AAT1149IUV-0.6-T1 Datasheet(PDF) 1 Page - Advanced Analogic Technologies

Part # AAT1149IUV-0.6-T1
Description  3MHz Fast Transient 400mA Step-Down Converter
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Manufacturer  ANALOGICTECH [Advanced Analogic Technologies]
Direct Link  http://www.analogictech.com
Logo ANALOGICTECH - Advanced Analogic Technologies

AAT1149IUV-0.6-T1 Datasheet(HTML) 1 Page - Advanced Analogic Technologies

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AAT1149
3MHz Fast Transient 400mA Step-Down Converter
SwitchRegTM
PRODUCT DATASHEET
1149.2008.08.1.3
1
www .analogictech.com
General Description
The AAT1149 SwitchReg is a 3.0MHz step-down con-
verter with an input voltage range of 2.7V to 5.5V and
output voltage as low as 1.0V. It is optimized to react
quickly to load variations and operate with a tiny 0603
inductor that is only 1mm tall.
The AAT1149 output voltage is programmable via exter-
nal feedback resistors. It can deliver 400mA of load cur-
rent while maintaining a low 45μA no load quiescent
current. The 3.0MHz switching frequency minimizes the
size of external components while keeping switching
losses low.
The AAT1149 maintains high efficiency throughout
the operating range, which is critical for portable
applications.
The AAT1149 is available in a Pb-free, space-saving
2.0x2.1mm SC70JW-8 package or a 5-pin wafer-level
chip scale (WLCSP) package and is rated over the -40°C
to +85°C temperature range.
Features
• Ultra-Small 0603 Inductor (Height = 1mm)
• VIN Range: 2.7V to 5.5V
• VOUT Adjustable from 1.0V to VIN
• 400mA Max Output Current
• Up to 98% Efficiency
• 45μA No Load Quiescent Current
• 3.0MHz Switching Frequency
• 70μs Soft Start
• Fast Load Transient
• Over-Temperature Protection
• Current Limit Protection
• 100% Duty Cycle Low-Dropout Operation
• <1μA Shutdown Current
• SC70JW-8 or 0.9x1.2mm WLCSP 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
L1 1.8µH
C1
4.7µF
R1
118k
R2
59k
VOUT = 1.8V
VIN = 3.6V
C2
4.7µF
EN
FB
IN
LX
AGND
PGND
PGND
PGND
AAT1149
U1


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