NXP Semiconductors MC33FS8510A0KSR2

Overview

MC33FS8510A0KSR2 from NXP Semiconductors is an ASIL D–compliant automotive fail-safe system basis chip (SBC) integrating a VPRE synchronous buck controller, three low-voltage synchronous buck converters (BUCK1/BUCK2/BUCK3), one boost converter, and two LDOs. It delivers up to 3.6 A peak per buck rail, supports 60 V DC input, and features SPI/I²C control with CRC, fail-safe output, and power-good/reset signaling for radar and ADAS domain controllers.

For engineers reviewing the MC33FS8510A0KSR2 datasheet, MC33FS8510A0KSR2 pinout, MC33FS8510A0KSR2 application, or MC33FS8510A0KSR2 equivalent, key selection criteria include ASIL D safety certification, multi-rail sequencing capability, integrated fault monitoring (VCOREMON, VMONx), frequency synchronization I/O (FIN/FOUT), and OTP-configurable regulator settings for radar sensor power domains.

Technical Context

The MC33FS8510A0KSR2 implements a hierarchical safety architecture with dedicated fail-safe state machine, challenger watchdog, FCCU interface for MCU error monitoring, and built-in self-test (ABIST/LBIST). Its power management includes independent regulation paths: VPRE (external MOSFET controller), BUCK1 (MCU core supply with SVS), BUCK2/BUCK3 (configurable multi-phase capable rails), BOOST (integrated low-side switch), and dual LDOs (400 mA each).

It supports deterministic power-up sequencing across six slots, thermal shutdown (TSD) response with DFS propagation, and voltage supervision on five inputs (VCOREMON, VDDIOMON, VMON1–VMON4) with programmable OV/UV thresholds and deglitch timing. EMC optimization includes spread spectrum, slew rate control, and external frequency sync via FIN/FOUT pins.

Key Specifications

Pinout & Package

MC33FS8510A0KSR2 uses HVQFN56 package (8 mm × 8 mm × 0.85 mm, 0.5 mm pitch, wettable flank), thermally enhanced with exposed pad connected to GNDFS/GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive SBC applications.

Compared with MC33FS8520A0KSR2, MC33FS8510A0KSR2 reduces solution size and cost by omitting BUCK2 while retaining full ASIL D safety for radar core power; versus MC33FS8410G0KSR2, it provides higher integrity fault containment, extended voltage monitoring, and boost capability essential for radar transceiver biasing.

Availability

MC33FS8510A0KSR2 is available at Aetrix Electronics and suitable for radar sensor modules, ADAS domain controllers, and automotive vision systems requiring stable component supply, long-term lifecycle support, and ASIL D–certified power management.

Supply support for MC33FS8510A0KSR2 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.

The FS85 product line delivers ASIL D–compliant system basis chips for next-generation radar, vision, and domain controller platforms, integrating safety-critical power management, fault monitoring, and deterministic sequencing in a single HVQFN56 package.

FAQ

What safety certifications does the MC33FS8510A0KSR2 hold?

The MC33FS8510A0KSR2 is developed in compliance with ISO 26262 for ASIL D applications and qualified per AEC-Q100 Grade 1 (−40 °C to +125 °C ambient). It includes integrated ABIST/LBIST, challenger watchdog, FCCU interface, and fail-safe state machine - all validated for automotive safety-critical power domains. The MC33FS8510A0KSR2 meets full ASIL D requirements as documented in its product data sheet Rev. 12.0.

Does the MC33FS8510A0KSR2 support multi-phase operation?

Yes, the MC33FS8510A0KSR2 supports multi-phase operation between BUCK1 and BUCK2 to extend current capability up to 7.2 A peak on a single rail. This is enabled via phase-shifting control (e.g., delay 0/3/6 µs) and synchronized gate drive signals. BUCK2 is present in the MC33FS8510A0KSR2 variant per Table 1 of the datasheet, and phase alignment is configured via OTP programming. The MC33FS8510A0KSR2 implements this capability using internal timing registers and shared clock domains.

How is power sequencing controlled on the MC33FS8510A0KSR2?

Power sequencing on the MC33FS8510A0KSR2 is controlled via six programmable slots, each assigning start/stop timing to individual regulators (BUCK1–BUCK3, LDO1/LDO2, BOOST). Slot assignment (e.g., BUCK1 in Slot 0, BUCK3 in Slot 6) and inter-slot delays are configured in OTP. Sequencing executes autonomously after power-on or reset, without MCU intervention. The MC33FS8510A0KSR2 also supports dynamic reconfiguration via SPI/I²C for runtime adjustments during development or diagnostics.

Can the MC33FS8510A0KSR2 be used without external MOSFETs?

Yes - the MC33FS8510A0KSR2 integrates synchronous rectifiers for BUCK1, BUCK2, and BUCK3, enabling full operation without external MOSFETs for those rails. However, the VPRE controller requires external high- and low-side MOSFETs (driven via PRE_GHS/PRE_GLS), and BOOST uses an internal low-side switch but requires an external diode/capacitor network. The MC33FS8510A0KSR2's integrated power stages eliminate external FETs for its three main buck converters, reducing layout complexity and BOM count.

What is the function of the PSYNC pin on the MC33FS8510A0KSR2?

The PSYNC pin on the MC33FS8510A0KSR2 serves as a bidirectional power synchronization interface that coordinates power-up sequencing between two MC33FS8510A0KSR2 devices or between an MC33FS8510A0KSR2 and an external PMIC. It eliminates the need for software coordination or external timing logic by enabling hardware-triggered, deterministic startup alignment. In the MC33FS8510A0KSR2, PSYNC operates in master/slave mode and is configurable via OTP to initiate or respond to sync pulses during the power-on reset sequence.