AAT1149B中文资料2.2MHz Fast Transient 400mA Step-Down Converter数据手册Skyworks规格书

描述 Description

The AAT1149B SwitchReg is a 2.2MHz step-down converter 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 external components while keeping switching losses low.
The AAT1149B maintains high efficiency throughout the operating range, which is critical for portable applications.
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.

特性 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
·0.9x1.2mm WLCSP Package
·Temperature Range: -40°C to +85°C