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AAT1149BIUV-1.8-T1 Datasheet(PDF) 1 Page - Skyworks Solutions Inc. |
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AAT1149BIUV-1.8-T1 Datasheet(HTML) 1 Page - Skyworks Solutions Inc. |
1 / 17 page 1 AAT1149B 2.2MHz FastTransient 400mA Step-Down Converter DATA SHEET Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 201989B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 18, 2013 General Description The AAT1149B SwitchReg is a 2.2MHz step-down con- verter with an input voltage range of 2.2V to 5.5V. It is optimized to react quickly to load variations and operate with a tiny 0603 inductor that is only 1mm tall. The AAT1149B can deliver 400mA of load current while maintaining a low 45μA no load quiescent current. The 2.2MHz switching frequency minimizes the size of exter- nal components while keeping switching losses low. The AAT1149B maintains high efficiency throughout the operating range, which is critical for portable applica- tions. The AAT1149B is available in a Pb-free, space-saving 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: 2.2V to 5.5V • VOUT Fixed 1.8V • 400mA Max Output Current • Up to 98% Efficiency • 45μA No Load Quiescent Current • 2.2MHz Switching Frequency • 70μs Soft Start • Fast Load Transient • Over-Temperature Protection • Current Limit Protection • 100% Duty Cycle Low-Dropout Operation • <1μA Shutdown Current • 0.91 x 1.235mm 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 2.2µH C1 4.7µF VOUT = 1.8V VIN = 3.6V C2 4.7µF EN FB IN LX AGND PGND PGND PGND AAT1149B U1 |
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