NXP Semiconductors MC33907LAER2

Overview

MC33907LAER2 from NXP Semiconductors is an automotive-grade power system basis chip integrating high-speed CAN transceiver, LIN transceiver, pre-regulator SMPS (buck-boost or buck), 0.8 A VCORE switching regulator, dual linear regulators (VCCA and VAUX), battery voltage sensing, six configurable I/Os, and fail-safe outputs compliant with ASIL D functional safety requirements. It operates from 2.7 V to 40 V input and supports low-power mode at 32 µA.

For engineers reviewing the MC33907LAER2 datasheet, MC33907LAER2 pinout, MC33907LAER2 application, or MC33907LAER2 equivalent, this device serves as a complete power management and communication hub for safety-critical automotive ECUs - particularly where integrated HSCAN, LIN, multi-rail regulation, and fault-tolerant supervision are required in compact 48-pin LQFP-EP packaging.

Technical Context

The MC33907LAER2 implements a dual-stage power architecture: a highly flexible VPRE pre-regulator supporting non-inverting buck-boost or standard buck topologies feeds a dedicated VCORE SMPS delivering up to 0.8 A at 1.2–3.3 V, while independent linear regulators supply VCCA (3.3 V/5.0 V, up to 300 mA) and VAUX (3.3 V/5.0 V, up to 300 mA). Its embedded HSCAN interface complies fully with ISO 11898-2 and -5, and LIN meets SAE J2602-2 and LIN spec 1.3/2.0/2.1/2.2.

Power management includes programmable wake-up sources (CAN, LIN, six I/Os), thermal warning/shutdown thresholds per regulator (125 °C warn / 160 °C shutdown), and a fail-safe machine with active-low FS0B and RSTB outputs. The analog MUX output enables battery voltage, die temperature, and I/O monitoring via a single MCU ADC channel.

Key Specifications

Pinout & Package

MC33907LAER2 is housed in a 48-pin LQFP-EP (exposed pad) package, optimized for thermal dissipation in automotive under-hood environments. The exposed pad must be soldered to PCB ground plane for thermal and EMI performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power system basis chip applications.

Compared with MC33907LAER2, MC33908LAER2 offers higher VCORE current for demanding MCUs but shares identical safety architecture and communication interfaces; MAX22190ATG+T provides no power or bus functionality and cannot replace MC33907LAER2 in automotive ECU designs.

Availability

MC33907LAER2 is available at Aetrix Electronics and suitable for electrical power steering, engine management, and battery management systems requiring stable component supply, automotive qualification (AEC-Q100 Grade 1), and long-term lifecycle support.

Supply support for MC33907LAER2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in functional safety and automotive-grade IC design.

The MC33907LAER2 belongs to NXP's SMARTMOS power system basis chip family, engineered specifically for ASIL D-compliant automotive ECUs needing integrated power regulation, CAN/LIN communication, and fail-safe supervision in a single package.

FAQ

What is the maximum output current of the VCORE regulator in MC33907LAER2?

The VCORE regulator in MC33907LAER2 delivers up to 0.8 A continuously in normal operating mode. This rating is confirmed in Table 1 (Orderable part variations) and Table 4 (Operating range) of the MC33907-MC33908D2 datasheet, where "MC33907LAE" is explicitly specified with 0.8 A VCORE capability. The device also features current limiting at 1–2 A and thermal shutdown at 160 °C to protect against overload conditions.

Does MC33907LAER2 support both buck and buck-boost configurations for the VPRE pre-regulator?

Yes, MC33907LAER2 supports both buck and non-inverting buck-boost topologies for its VPRE pre-regulator, as stated in the "Features" section and Figure 1 of the MC33907-MC33908D2 datasheet. This flexibility allows stable VCORE regulation across the full input range: buck mode operates above 4.6 V, while buck-boost extends operation down to 2.7 V - essential for automotive cold-crank scenarios.

What LIN protocol versions does MC33907LAER2 support?

MC33907LAER2 supports LIN protocol specifications 1.3, 2.0, 2.1, and 2.2, as well as SAE J2602-2, per the "Features" section and Section 1 of the MC33907-MC33908D2 datasheet. Its LIN transceiver (pins RXDL/TXDL) is fully compliant with these standards, enabling interoperability with legacy and modern LIN slave nodes in automotive body and comfort systems.

How does MC33907LAER2 implement functional safety for ASIL D compliance?

MC33907LAER2 achieves ASIL D readiness through hardware-based fail-safe mechanisms: dual independent voltage supervisors, thermal warning/shutdown circuits per regulator, open-drain FS0B and RSTB outputs that assert on fault detection, redundant I/O monitoring (e.g., IO_1 for Vcore feedback), and diagnostic coverage of critical paths. These features are detailed in Sections 1 and 4.1–4.2 of the MC33907-MC33908D2 datasheet and align with ISO 26262 requirements for safety-oriented system partitioning.

What is the purpose of the MUX_OUT pin on MC33907LAER2?

The MUX_OUT pin on MC33907LAER2 is an analog multiplexed output that routes selected internal signals - including battery voltage (VSENSE), die temperature, and configured I/O states - to a single MCU ADC input. Controlled via SPI, it reduces pin count and simplifies analog monitoring. Its accuracy is ±5% for VSENSE using a 5.1 kΩ resistor, as specified in Table 4 of the MC33907-MC33908D2 datasheet.