Microchip MIC33M356 3A功率模块降压转换器解决方案

Microchip公司的MIC33M356是具有HyperLight Load®模式和I2C接口的 3A功率模块降压转换器.具有I2C可编程高效低压输入,3A电流同步降压并集成了电感的稳压功率模块.恒定开态时间(COT)控制架构具有HyperLight Load®模式在轻负载时具有非常高的效率,同时还依然具有超块的瞬态响应.I2C接口允许可编输出电压从0.6V到1.28V,5mV分辨率或0.6V到3.84V,分辨率10 mV和20mV.器件还提供;两个默认电压(0.9V和1.0V)选择.输入电压为2.4V到5.5V,输出电流3A,转换速率从0.2 ms/V 到 3.2 ms/V,高边限流3.5A或5A.线路/负载/温度范围的输出电压精度±1.5%,具有预偏压输出的安全起动,关断时电流典型为1.5 μA.低压降(100%)占空比运作,I2C速度高达3.4MHz.满足规范CISPR32 Class B Emissions,主要用在固态设备(SSD),平板电脑,笔记本电脑和超级本电脑,FPGA,DSP和低压ASIC电源.本文介绍了MIC33M356主要特性,框图,典型应用电路图和MIC33M356评估板ADM00855主要特性,测试建立图,电路图,材料清单和PCB设计图.
The Microchip MIC33M356 is a I2C programmable,high-efficiency, low-voltage input, 3A current, synchronousstep-down regulator power module withintegrated inductor. The Constant On-Time (COT)control architecture with HyperLight Load® modeprovides very high efficiency at light loads, while stillhaving ultra-fast transient response.
The I2C interface allows programming the output voltagebetween 0.6V and 1.28V, with 5 mV resolution orbetween 0.6V and 3.84V, with 10 mV and 20 mV resolution.
Two different default voltage options (0.9V and1.0V) are provided so that the application can bestarted with a safe voltage level and then moved tohigh-performance modes under I2C control.An open-drain Power Good output facilitates outputvoltage monitoring and sequencing. If set in shutdown(EN = GND), the MIC33M356 typically draws 1.5 μA ofcurrent, while the output is discharged through a 10pull-down resistor (if the output discharge feature is enabled).
The MIC33M356 pinout is compatible with theMicrochip MIC33M350, so that applications can beeasily converted.
The 2.4V to 5.5V input voltage range, low shutdown andquiescent currents make the MIC33M356 i...