AAT1145中文资料1.5A Step-Down Converter数据手册Skyworks规格书

描述 Description

The AAT1145 SwitchReg™ is a 1.2MHz constant frequency current mode PWM step-down converter.
It is ideal for portable equipment requiring very high current up to 1.5A from single-cell Lithium-ion batteries while still achieving over 90% efficiency during peak load conditions. The AAT1145 also can run at 100% duty cycle for low dropout operation, extending battery life in portable systems while light load operation provides very low output ripple for noise sensitive applications.
The AAT1145 can supply up to 1.5A output load current from a 2.5V to 5.5V input voltage and the output voltage can be regulated as low as 0.6V. The high switching frequency minimizes the size of external components while keeping switching losses low. The internal slope compensation setting allows the device to operate with smaller inductor values to optimize size and provide efficient operation.
The AAT1145 is available in adjustable (0.6V to VIN) and fixed (1.8V) output voltage versions. The device is available in a Pb-free, 3x3mm 10-lead TDFN package and is rated over the -40°C to +85°C temperature range.

特性 Features

·Input Voltage Range: 2.5V to 5.5V
·Output Voltages from 0.6V to VIN
·1.5A Output Current
·High Efficiency: Up to 95%
·1.2MHz Constant Switching Frequency
·Low RDS(ON) Internal Switches: 0.15Ω
·Allows Use of Ceramic Capacitors
·Current Mode Operation for Excellent Line and Load Transient Response
·Short-Circuit and Thermal Fault Protection
·Soft Start
·Low Dropout Operation: 100% Duty Cycle
·Low Shutdown Current: ISHUTDOWN < 1µA
·TDFN33-10 Package
·-40°C to +85°C Temperature Range

简介

AAT1145属于集成电路（IC）的稳压器-DC-DC开关稳压器。由制造生产的AAT1145稳压器 - DC-DC 开关稳压器DC-DC 开关稳压器 PMIC（电源管理集成电路）产品族中的产品是元器件级设备，用于需要稳定 DC 输入电压和/或将其转换为不同幅度的输出电压的应用。这些器件与称为“控制器”PMIC 的类似产品的区别在于集成了主开关元件，设备提供的电力会通过该元件。