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AAT1149IUV-0.6-T1 Datasheet(PDF) 1 Page - Advanced Analogic Technologies |
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AAT1149IUV-0.6-T1 Datasheet(HTML) 1 Page - Advanced Analogic Technologies |
1 / 21 page 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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