My Inquiry
My Account
NXP Semiconductors MFS8631BMBA0ESR2
- Part No.:
- MFS8631BMBA0ESR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
MFS8631BMBA0ESR2.pdf
- Description:
- SAFETY SYSTEM BASIS CHIP FOR DOM
- Quantity:
- Payment:
- Shipping:
Inventory:1,104
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MFS8631BMBA0ESR2 from NXP Semiconductors is a fail-safe system basis chip (SBC) designed for automotive domain controllers requiring ASIL B safety compliance, 12 V battery network operation (36 V max), and integrated power management. It delivers a 15 A VPRE buck controller, 2.5 A BUCK, 1 A BOOST, dual 400 mA LDOs, and monitors up to 10 voltage rails with ±1 % accuracy for radar and ADAS applications.
For engineers reviewing the MFS8631BMBA0ESR2 datasheet, MFS8631BMBA0ESR2 pinout, MFS8631BMBA0ESR2 application, or MFS8631BMBA0ESR2 equivalent, key selection criteria include its 36 V input rating, OTP-configurable ASIL B safety features, I²C-controlled sequencing, and QFN48 wettable flank package optimized for thermal performance in electrified vehicle ECUs.
Technical Context
The MFS8631BMBA0ESR2 implements a leader/follower power-up sequencing architecture via XFAILB, enabling synchronized startup across cascaded PMICs in BYLink platform designs. Its fail-safe state machine independently validates voltage rails, watchdog inputs (FCCU1/FCCU2), and external IC status (ERRMON) before asserting PGOOD and RSTB.
It integrates analog multiplexing (AMUX) for MCU ADC monitoring of 10 VMON inputs-six resistor-bridge (VMON4–9), three DAC-based (VMON1–3), and one I²C-sourced (VMON0_I2C)-with dedicated bias circuitry ensuring ±1 % measurement accuracy across −40 °C to 125 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 36 V DC - supports full operation across 12 V automotive battery networks including cold-crank and load-dump conditions. |
| VPRE Output Capability | Configurable 3.3 V–5.0 V / up to 15 A - enables high-current pre-regulation for downstream MCUs or FPGAs without external e-fuse. |
| BUCK Output | 1.0 V–3.3 V / up to 2.5 A - supplies core voltage to automotive-grade microcontrollers with integrated synchronous rectification. |
| Voltage Monitoring Inputs | 10 channels with ±1 % accuracy - allows comprehensive supervision of internal regulators and external PMIC rails for ISO 26262 ASIL B compliance. |
| Interface | 32-bit I²C with 8-bit CRC - provides robust configuration, fault reporting, and real-time register access for safety-critical diagnostics. |
| Package | HPQFN48eP (SOT619-26), wettable flanks - ensures reliable solder joint inspection and thermal resistance of 23 °C/W (2s6p) for high-power density layouts. |
| Operating Temperature | −40 °C to +125 °C - qualified per AEC-Q100 Grade 1 for under-hood and ECU module deployment. |
| Safety Certification | ISO 26262 ASIL B compliant - includes LBIST/ABIST, challenger watchdog support, and latent-fault-detecting safety outputs (PGOOD, RSTB, FS0B). |
Pinout & Package
Package: HPQFN48eP (48-pin plastic thermally enhanced very thin quad flat package with exposed pad and wettable flanks, SOT619-26).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LDO1 / LDO2 | Linear regulator outputs | Provide configurable 1.5–5.0 V (LDO1) and 1.1–5.0 V (LDO2) at 400 mA each for MCU I/O and peripheral rail decoupling. |
| VPRE_SW / PRE_GHS / PRE_GLS | High-voltage buck controller terminals | Drive external high-side/low-side MOSFETs and switch node for 15 A VPRE regulation with e-fuse protection. |
| VMON0_I2C – VMON9_RES | Voltage monitoring inputs | 10 dedicated analog inputs supporting resistor-divider (VMON4–9, VMON10), DAC-based (VMON1–3), and I²C-sourced (VMON0_I2C) rail supervision. |
| XFAILB | Power synchronization I/O | Enables leader/follower sequencing with other NXP SBCs in BYLink platforms, eliminating need for external timing coordination logic. |
| PGOOD / RSTB / FS0B | Fail-safe outputs | Open-drain safety signals with latent fault detection - RSTB resets MCU; FS0B asserts safe state; PGOOD confirms stable power delivery. |
| FCCU1 / FCCU2 | MCU failure monitoring inputs | Accept PWM fault signatures from MCU to detect lockup or timing violations, feeding into fail-safe state machine decision logic. |
Key Features
| Feature | Design Value |
|---|---|
| BYLink synchronization | Enables multi-SBC systems to behave as single coordinated power domain with synchronized startup, shutdown, and fault propagation. |
| 10-channel ±1 % voltage monitoring | Supports end-to-end safety validation of both internal regulators and external PMIC rails required for ASIL B decomposition. |
| Configurable 15 A VPRE buck controller | Eliminates need for discrete HV buck stages while integrating e-fuse protection to prevent damage during overcurrent events. |
| I²C with 8-bit CRC | Ensures command integrity during safety-critical configuration writes and diagnostic reads in noisy automotive environments. |
| Wettable flank QFN48 | Facilitates automated optical inspection (AOI) of solder joints and improves thermal dissipation for sustained 15 A operation. |
| OTP-programmable ASIL B configuration | Allows factory customization of watchdog mode (simple/challenger), VMON channel enablement, and FIN/VMON9_RES pin function without hardware change. |
Applications
| Radar Signal Processing Unit | ADAS Domain Controller |
|---|---|
Use Scenario: Powers high-speed radar SoCs (e.g., TI AWR2944) requiring tightly regulated 1.0 V core, 1.8 V I/O, and 3.3 V interface rails under wide temperature and voltage transients. IC Role / Device Role / Timing Role: Centralized power manager and safety monitor - regulates all rails, sequences startup, and validates voltage stability before releasing RSTB to radar processor. Use Value: Enables single-chip power + safety solution meeting ASIL B requirements without external supervisors or sequencers. | Use Scenario: Supplies multiple heterogeneous processors (e.g., NXP S32G, Infineon AURIX TC4x) in zonal E/E architectures with independent voltage domains and coordinated fail-safe behavior. IC Role / Device Role / Timing Role: System basis chip acting as power hub and safety coordinator - manages inter-PMIC synchronization via XFAILB and consolidates fault reporting over I²C. Use Value: Reduces BOM count and PCB area by integrating 5 regulators, 10-rail monitoring, and fail-safe outputs in one AEC-Q100 qualified package. |
| Electrified Powertrain Gateway | Camera-Based Vision ECU |
Use Scenario: Powers gateway MCUs interfacing with battery management systems (BMS), motor controllers, and CAN FD networks in 12 V auxiliary power domains. IC Role / Device Role / Timing Role: Fail-safe power supervisor - monitors BMS-supplied rails (e.g., 5 V sensor supply) via VMONx_RES inputs and triggers FS0B on deviation. Use Value: Provides certified functional safety layer for communication gateways without requiring redundant external monitoring ICs. | Use Scenario: Supplies image signal processors (ISPs), stereo camera sensors, and MIPI CSI-2 transceivers in driver-monitoring or surround-view systems. IC Role / Device Role / Timing Role: Multi-rail power source with precise sequencing - powers ISP core (1.1 V), memory (1.2 V), and interface (1.8 V/3.3 V) in defined order using AMUX and VMON feedback. Use Value: Guarantees clean power-up sequence critical for pixel-perfect image capture and avoids sensor initialization faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fail-safe SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MFS8633BMBA0ESR2 | Includes ERRMON pin and FIN/VMON9_RES multiplexing; supports ASIL D watchdog challenger mode. | Required for ASIL D systems needing external IC failure monitoring and dual watchdog verification. | Select when full ASIL D decomposition or ERRMON-based fault injection testing is mandated. |
| MFS8623BMBA0ESR2 | Rated for 60 V input (24 V battery network); lacks BOOST converter; same ASIL B safety architecture. | Targeted at commercial vehicle ECUs with higher input voltage stress and no low-voltage boost requirement. | Choose for truck/bus applications where 36 V max is insufficient and BOOST is unused. |
Compared with MFS8631BMBA0ESR2, MFS8633BMBA0ESR2 adds ERRMON and ASIL D watchdog capability at identical pinout and OTP flexibility, while MFS8623BMBA0ESR2 trades BOOST and 36 V rating for 60 V tolerance and reduced feature set - enabling cost-optimized scaling within the FS86 family.
Availability
MFS8631BMBA0ESR2 is available at Aetrix Electronics and suitable for radar signal processing units, ADAS domain controllers, and electrified powertrain gateways requiring stable component supply, long-term automotive lifecycle support, and ASIL B-certified power management.
Supply support for MFS8631BMBA0ESR2 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 company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with leadership in automotive MCUs, radar processors, and functional safety-certified power ICs.
The FS86 family-including MFS8631BMBA0ESR2-is engineered for domain controller power management in next-generation ADAS, radar, and vehicle electrification systems, delivering scalable ASIL B/D safety, BYLink synchronization, and integrated high-current regulation.
FAQ
What is the maximum input voltage rating for MFS8631BMBA0ESR2?
MFS8631BMBA0ESR2 is rated for a maximum input voltage of 36 V DC, making it suitable for 12 V automotive battery networks including load-dump and jump-start conditions. This differs from the 60 V-rated FS862x variants intended for 24 V commercial vehicle applications.
Does MFS8631BMBA0ESR2 support fail-safe power sequencing with other NXP SBCs?
Yes, MFS8631BMBA0ESR2 supports synchronized power sequencing via the XFAILB pin as part of NXP's BYLink system power platform. When configured as leader or follower, it coordinates startup, shutdown, and fault propagation with compatible FS86 devices to behave as a unified power domain.
How many voltage rails can MFS8631BMBA0ESR2 monitor, and what is the accuracy?
MFS8631BMBA0ESR2 can monitor up to 10 voltage rails with ±1 % accuracy across its VMON inputs - including six resistor-bridge (VMON4–9), three DAC-based (VMON1–3), and one I²C-sourced (VMON0_I2C) channel - enabling comprehensive supervision of internal and external power supplies for ASIL B compliance.
What safety certifications apply to MFS8631BMBA0ESR2?
MFS8631BMBA0ESR2 is developed in compliance with ISO 26262 and qualified per AEC-Q100 Grade 1 (−40 °C to +125 °C). It supports ASIL B safety goals through integrated LBIST/ABIST, challenger watchdog capability, and latent-fault-detecting safety outputs (PGOOD, RSTB, FS0B).
Is MFS8631BMBA0ESR2 pin-compatible with other FS86 family members?
Yes, MFS8631BMBA0ESR2 uses the HPQFN48eP package and shares identical pinout with all FS86x0–FS86x3 variants. Functional differences (e.g., BOOST presence, ERRMON, FIN/VMON9_RES multiplexing) are controlled via OTP programming, enabling hardware reuse across ASIL B and ASIL D configurations.
MFS8631BMBA0ESR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Camera
- Current - Supply:
- -
- Voltage - Supply:
- 36V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 48-HVQFN (7x7)
MFS8631BMBA0ESR2 FAQ
1.How can I place an order for MFS8631BMBA0ESR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MFS8631BMBA0ESR2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MFS8631BMBA0ESR2 reliable?
The price and inventory of MFS8631BMBA0ESR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MFS8631BMBA0ESR2 is usually 5 days.
3.What payment methods are accepted for MFS8631BMBA0ESR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MFS8631BMBA0ESR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MFS8631BMBA0ESR2?
MFS8631BMBA0ESR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MFS8631BMBA0ESR2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MFS8631BMBA0ESR2?
For technical support, including MFS8631BMBA0ESR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MFS8631BMBA0ESR2 requirements.
6.How does Aetrix verify that MFS8631BMBA0ESR2 is sourced from the original manufacturer or authorized distributors?
All MFS8631BMBA0ESR2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MFS8631BMBA0ESR2 meets industry standards.
7.What is the process for return or replacement of MFS8631BMBA0ESR2?
All MFS8631BMBA0ESR2 units undergo pre-shipment inspection (PSI). If there is an issue with MFS8631BMBA0ESR2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MFS8631BMBA0ESR2 part is unused and in its original packaging.
Return procedure for MFS8631BMBA0ESR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MFS8631BMBA0ESR2 Tags
-
TPS2511DGNR
Texas Instruments
-
UTC2000/MG
Microchip Technology
-
TUSB320HAIRWBR
Texas Instruments
-
TPS61252DSGR
Texas Instruments
-
PI5USB30216CXUAEX
Diodes Incorporated
-
SN6501DBVR
Texas Instruments
-
CYPD3177-24LQXQT
Infineon Technologies
-
SN6501QDBVRQ1
Texas Instruments
-
STUSB1600AQTR
STMicroelectronics
-
SN6505BDBVR
Texas Instruments
-
SN6501DBVT
Texas Instruments
-
TPS65150PWPR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
