Maxim MAX20011C汽车16A降压转换器解决方案

Maxim公司的MAX20011C/MAX20011D是高效率同步降压转换器,输入电压3.0V到5.5V,输出电压范围从0.5V到1.275V.宽输入/输出电压范围和能提供高达16A峰值输出电流,使得该器件非常适合板上点负载和后调整应用. MAX20011C/MAX20011D对负载,线路和温度范围具有±1.5%输出误差.器件具有2.2MHz固定频率PWM模式,获得更好的噪音免疫和负载瞬态响应.2.2MHz频率允许使用所有陶瓷电容和最小化外接元件.选择扩频调制使电磁辐射减少到最低限度.集成的低RDS(ON)开关改善了重负载的效率,使布局比分立器件解决方案更为简单.MAX20011C峰值电流为16A,MAX20011D峰值电流为12A.I2C控制输出电压从0.5V到1.275V,每步为6.25mV.器件具有极好的负载瞬态性能和可编程补偿.器件有超温和短路保护.工作温度-40°C到 +125°C Grade 1汽车温度范围.主要用在汽车ADAS系统和SoC核电源.本文介绍了MAX20011C/MAX20011D主要优势和特性,内部框图, 应用电路图和评估板MAX20011C EVK主要特性,电路图,材料清单和PCB设计图.

 The MAX20011C/MAX20011D is a high-efficiency, synchronous step-down converter that operates with a 3.0V to 5.5V input voltage range and supplies a 0.5V to 1.275V output voltage range. The wide input/output voltage range and the ability to provide up to 16A peak output current make this device ideal for on-board point-of-load and post-regulation applications. The MAX20011C/MAX20011D achieves ±1.5% output error over load, line, and temperature ranges.

The MAX20011C/MAX20011D features a 2.2MHz fixed-frequency PWM mode for better noise immunity and load-transient response. The 2.2MHz frequency operation allows for the use of all ceramic capacitors and minimizes external components. The spread-spectrum frequency modulation option minimizes radiated electromagnetic emissions. Integrated low RDS(ON) switches improve efficiency at heavy loads and make layout simpler than discrete solutions.

The MAX20011C/MAX20011D is offered with factory-preset output voltage. The I2C interface supports dynamic voltage adjustment with programmable slew rates. Other features include programmable soft start, overcurrent, and overtemperature protecti...