[原创]Maxim MAX20029C汽车应用四路低压降压转换器解决方案

Maxim公司的MAX20029／MAX20029B／MAX20029C是集成了四个低电压高效率降压DC／DC转换器,四个输出中每个输出可在工程或外接电阻可编程,电压在1V 到 4.0V (MAX20029／MAX20029B)或0.7V到3.8V (MAX20029C). MAX20029／MAX20029C有两路0.5A／1A／1.5A和两路0.5A／1.5A,而MAX20029B有两路0.5A／1.5A和组合1路和2路成为单路2A/3A.PMIC工作电压3.0V到5.5V,非常适合汽车点负载和后调整应用.PMIC具有固定频率PWM模式工作,开关频率2.2MHz.高频率工作可使用全陶瓷电容设计和小尺寸外接元件.片上低阻抗开关保证了高负载时高效率而降低了临界电感,是得PCB布局变得非常简单易行.内部电流检测和回路补偿降低了PCB空间和系统成本.器件具有输入电压过压监测和超温与短路保护.工作温度-40ºC 到 +125ºC,主要用在汽车和工业应用.本文介绍了MAX20029C主要优势和特性,简化框图和内部框图,几种应用电路以及评估板MAX20029 EVK主要优势和特性,电路图,材料清单和PCB设计图.

 The MAX20029/MAX20029B/MAX20029C power-management ICs (PMICs) integrate four low-voltage, high-efficiency, step-down DC-DC converters. Each of the four outputs is factory or resistor programmable between 1V to 4.0V (MAX20029/MAX20029B) or 0.7V to 3.8V (MAX20029C). The MAX20029/MAX20029C has two 0.5A/1A/1.5A channels and two 0.5A/1.5A channels, while the MAX20029B has two 0.5A/1.5A channels and by combining channels 1 and 2, a single 2A/3A channel. The PMICs operate from 3.0V to 5.5V, making them ideal for automotive point-of-load and post-regulation applications.

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