[原创]NXP PCA9450i.MX 8M应用处理器电源管理方案

NXP公司的PCA9450是 i.MX 8M应用处理器电源管理IC(PMIC),通过系统UBOOT配置支持各种存储器(DDR4/LPDDR4/DDR3L等)而不需要改变硬件.器件提供六个高效降压稳压器,5个LDO,一个400mA负载开关,2路电平转移器和32.768 kHz晶振驱动器.三个降压稳压器支持动态电压扫描(DVS)和可编上升和下降时间,支持遥控检测,以补偿降压稳压器对负载的IR降低.器件工作温度为-40 C 到 105 C.PCA9450AA具有三个3A降压稳压器, PCA9450B具有两个3A降压稳压器,而PCA9450C具有6A双相降压稳压器和3A降压稳压器. ESD保护特性,人体模式(HBM)为+/-2000V,充电模式(CDM)为+/-500V.主要用在IoT设备,平板电脑,电子销售终端(ePOS)和工业应用.本文介绍了PCA9450主要特性,框图和功能框图, PCA9450AA和PCA9450B以及PCA9450C用电路图,以及评估板PCA9450AA-EVK, PCA9450B-EVK和PCA9450C-EVK主要特性,电路图,材料清单和PCB元件布局图.

PCA9450 is a single chip Power Management IC (PMIC) specifically designed to

support i.MX 8M family processor in both 1 cell Li-Ion and Li-polymer battery portable

application and 5 V adapter non-portable applications. It supports various memory types

(DDR4/LPDDR4/DDR3L, etc.)via system UBOOT configuration, which does not require

hardware change.

The device provides six high efficiency step-down regulators, five LDOs, one 400 mA

load switch, 2-channel level translator and 32.768 kHz crystal oscillator driver.

Three buck regulators support Dynamic Voltage Scaling (DVS) feature along with

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