AAT AAT1149A
The AAT1149A 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 AAT1149A can deliver 400mA of load current and operates in PWM only mode for low noise operation.| Part No. | AAT1149A |
|---|---|
| Datasheet | AAT1149A Download |
| Manufacturer |  AAT |
| Description | 2.2MHz Fast Transient 400mA Step-Down Converter |
| Buy | Stock & Price |
GENERAL DESCRIPTION
The 2.2MHz switching frequency minimizes the size of external components while keeping switching losses low. The AAT1149A is optimized for low noise portable applications. The AAT1149A 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 1.875V
● 400mA Max Output Current
● Up to 98% Efficiency
● 3mA 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
APPLICATIONS
● Cellular Phones● Digital Cameras
● Handheld Instruments
● Microprocessor / DSP Core / IO Power
● PDAs and Handheld Computers
● USB Devices Typical Application VIN = 3.6V C2 4.7µF U1 AAT1149A IN LX EN FB AGN...
