基于MC33905设计的MCU功率管理方案

MC33905是第二代系统基本芯片(SBC),包括有多中特性和增强的模块设计,能作为MCU和其它集成电路如传感器,CAN收发器的先进的功率管理单元. MC33905内置了高速CAN接口(ISO11898-2 和-5),以及本地和总线故障诊断,保护以及故障安全操作模式等.本文介绍了MC33905主要特性,方框图,以及简化应用框图和典型应用电路, MC33905评估板EVB主要特性, 电路图和材料清单(BOM).The 33904/5 is the second generation family of System Basis Chips which combine several features and enhance present module designs. The device works as an advanced power management unit for the MCU and additional integrated circuits such as sensors, CAN transceivers. It has a built-in enhanced high speed CAN interface (ISO11898-2 and -5), with local and bus failure diagnostics, protection, and fail safe operation mode. The SBC may include one or two LIN 2.1 interfaces with LIN output pin switches. It includes up to 4 wake-up input pins than can also be configured as output drivers for is device implements multiple Low Power modes, with very low-current consumption. In addition, the device is part of a family concept where pin compatibility, among the various devices with and without LIN interfaces, add versatility to module e 33904/5 also implements an innovative and advanced fail-safe state machine and concept 33904/5主要特性:Protected 5.0V or 3.3V regulators for MCU (part number selectable) and additional ICs (SPI configurable) with optional external PNP usage to increase current capability for lly-protected embedded 5.0 V regulator for the CAN driverExtremely low quiescent current in low power modesMultiple under-voltage detections to address various MCU specifications and system operation modes (i.e. cranking)Multiple wake-up sources in low power modes: CAN or LIN bus, I/O transition, automatic timer, SPI message, and VDD over-current ltage, current and temperature protection with enhanced diagnostics that can be monitored by system via MUX outputISO11898-5 high speed CAN interface compatibility for baud rates of 40 kb/s to 1.0 Mb/s. LIN 2.1 and J2602 LIN interface compatibilityPb-free packaging designated by suffix code EK 图33905D内部方框图 图33905S内部方框图 图33904A内部方框图 图33905D简化应用方框图

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