器件名称: AAT1121IES-0.6-T1
功能描述: 1.5MHz, 250mA Step-Down Converter
文件大小: 544.88KB 共20页
简 介:AAT1121
1.5MHz, 250mA Step-Down Converter General Description
The AAT1121 SwitchReg is a 1.5MHz step-down converter with an input voltage range of 2.7V to 5.5V and output as low as 0.6V. Its low supply current, small size, and high switching frequency make the AAT1121 the ideal choice for portable applications. The AAT1121 delivers 250mA of load current, while maintaining a low 30A no load quiescent current. The 1.5MHz switching frequency minimizes the size of external components, while keeping switching losses low. The AAT1121 feedback and control delivers excellent load regulation and transient response with a small output inductor and capacitor. The AAT1121 is available in a Pb-free, 8-pin, 2x2mm TDFN or STDFN package and is rated over the -40°C to +85°C temperature range.
Features
SwitchReg
VIN Range: 2.7V to 5.5V VOUT Range: 0.6V to VIN 250mA Max Output Current Up to 96% Efficiency 30A Typical Quiescent Current 1.5MHz Switching Frequency Soft-Start Control Over-Temperature and Current Limit Protection 100% Duty Cycle Low-Dropout Operation <1A Shutdown Current Small External Components Ultra-Small TDFN22-8 or STDFN22-8 Package Temperature Range: -40°C to +85°C
Applications
Bluetooth Headsets Cellular Phones Digital Cameras Handheld Instruments Portable Music Players USB Devices
Typical Application
VIN AAT1121 VP VIN C1 4.7F EN FB LX L1 3.0μH R1 118kΩ R2 59kΩ C2 4.7F
VO = 1.8V
250mA
GND
PGND
1121.2007.03.1.2
1
AAT1121
1.5MHz, 250mA Step-Down……
