深圳市宏芯微科技有限公司 （非本站正式会员）

1.5A Maximum Output Current
• Input Voltage: 2.4V to 5.5V
• Output Voltage: 0.6V to VIN
• Up to 95% Efficiency
• 42μA No Load Quiescent Current
• No External Compensation Required
• 1.4MHz Switching Frequency
• Synchronizable to External Clock
• Optional "PWM Only" Low Noise Mode
• 100% Duty Cycle Low-Dropout Operation
• Internal Soft Start
• Over-Temperature and Current Limit
Protection
• <1μA Shutdown Current
• TSOPJW-12 or TDFN33-12 Package
• Temperature Range: -40°C to +85°C
Applications
• Cellular Phones
• Digital Cameras
• Hard Disk Drives
• MP3 Players
• PDAs and Handheld Computers
• Portable Media Players
• USB Devices

AAT1112：1.5A恒频恒电流模式降压转换器；输入电压范围为2.4V到5.5V；输出电压可在0.6V到VIN范围调节；斜率补偿电流模式脉冲宽度调制；1.5MHz和1.4MHz的高开关频率；内置软启动、短路和过热保护功能；额定工作温度范围是-40至+85℃；采用小型3×3mmTDFN封装。AAT1112适用于蜂窝、数码相机、硬盘驱动器及MP3播放器等

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The AAT1112 SwitchReg is a 1.5A step-down converter
with an input voltage range of 2.4V to 5.5V
and an adjustable output voltage from 0.6V to VIN.
The 1.4MHz switching frequency enables the use
of small external components. The small footprint
and high efficiency make the AAT1112 an ideal
choice for portable applications.
The AAT1112 delivers 1.5A maximum output current
while consuming only 42μA of no-load quiescent
current. Ultra-low RDS(ON) integrated MOSFETs and
100% duty cycle operation make the AAT1112 an
ideal choice for high output voltage, high current
applications which require a low dropout threshold.
The AAT1112 provides excellent transient
response and high output accuracy across the
operating range. No external compensation components
are required.
The AAT1112 is designed to maintain high efficiency
throughout the load range. Pulling the MODE/
SYNC pin high enables "PWM Only" mode, maintaining
constant frequency and low output ripple
across the operating range. Alternatively, the converter
may be synchronized to an external clock
input via the MODE/SYNC pin. Over-temperature
and short-circuit protection safeguard the AAT1112
and system components from damage.
The AAT1112 is available in a Pb-free, space-saving
TDFN33-12 or 2.75x3mm TSOPJW-12 package.
The product is rated over an operating temperature
range of -40°C to +85°C.