Maxim MAX15040高效4A开关电源稳压解决方案

Maxim公司的MAX15040高效开关电源稳压器,输出电流4A,输出电压从0.6V到0.9xVIN.器件工作电压2.4V到3.6V,具有1MHz固定频率PWM模式工作,输出电压精度±1%,主要应用在服务器电源,POL,ASIC/CPU/DSP内地和I/O电源,DDR电源,基站电源以及通信和网络设备电源等.本文介绍了MAX15040主要特性,方框图, VOUT = 1.8V全陶瓷电容设计电路图以及MAX15040评估板主要特性,电路图和材料清单.
The MAX15040 high-efficiency switching regulator delivers up to 4A load current at output voltages from 0.6V to (0.9 x VIN). The device operates from 2.4V to 3.6V, making it ideal for on-board point-of-load and postregulation applications. Total output-voltage accuracy is within ±1% over load, line, and temperature.
The MAX15040 features 1MHz fixed-frequency PWM mode operation. The high operating frequency allows for small-size external components.
The low-resistance on-chip nMOS switches ensure high efficiency at heavy loads while minimizing critical parasitic inductances, making the layout a much simpler task with respect to discrete solutions. Following a simple layout and footprint ensures first-pass success in new designs.
The MAX15040 incorporates a high-bandwidth (> 15MHz) voltage-error amplifier. The voltage-mode control architecture and the voltage-error amplifier permit a Type III compensation scheme to achieve maximum loop bandwidth, up to 200kHz. High loop bandwidth provides fast transient response, resulting in less required output capacitance and allowing for allceramic capacitor designs.
The MAX15040 features an output overload hiccup protection and peak current limit on both high-side (sourcing current) and low-side (sinking and sourcing current) MOSFETs, for ultra-safe operations in case of high output prebias, short-circuit conditions, severe overloads, or in converters with bulk electrolytic capacitors.
The MAX15040 features an adjustable output voltage. The output voltage is adjustable by using two external resistors at the feedback or by applying an external reference voltage to the ...