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AAT1141 Datasheet(PDF) 1 Page - Advanced Analogic Technologies |
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AAT1141 Datasheet(HTML) 1 Page - Advanced Analogic Technologies |
1 / 19 page AAT1141 Fast Transient 600mA Step-Down Converter SwitchRegTM PRODUCT DATASHEET 1141.2007.12.1.3 1 www .analogictech.com General Description The AAT1141 SwitchReg is a 1.4MHz step-down con- verter with an input voltage range of 2.7V to 5.5V and output voltage as low as 0.6V. It is optimized to react quickly to a load variation. The AAT1141 is available in fixed voltage versions with internal feedback and a programmable version with external feedback resistors. It can deliver 600mA of load current while maintaining a low 35μA no load quiescent current. The 1.4MHz switching frequency minimizes the size of external components while keeping switching losses low. The AAT1141 is designed to maintain high efficiency throughout the operating range, which is critical for por- table applications. The AAT1141 is available in a Pb-free SOT23-5 package and is rated over the -40°C to +85°C temperature range. Features • VIN Range: 2.7V to 5.5V • VOUT Fixed or Adjustable from 0.6V to VIN • 35μA No Load Quiescent Current • Up to 98% Efficiency • 600mA Max Output Current • 1.4MHz Switching Frequency • 120μs Soft Start • Fast Load Transient • Over-Temperature Protection • Current Limit Protection • 100% Duty Cycle Low-Dropout Operation • <1μA 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) 4.7µH L1 4.7µF C1 4.7µF C2 EN OUT IN LX GND AAT1141 U1 VIN VOUT |
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