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NXP Semiconductors MC33FS8405G0KSR2
- Part No.:
- MC33FS8405G0KSR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
MC33FS8405G0KSR2.pdf
- Description:
- SAFETY POWER MANAGEMENT IC, QFN5
- Quantity:
- Payment:
- Shipping:
Inventory:3,817
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Product details
Overview
MC33FS8405G0KSR2 from NXP Semiconductors is an ASIL B–capable automotive fail-safe system basis chip (SBC) integrating a VPRE synchronous buck controller, one low-voltage integrated synchronous BUCK1 converter (1.1 V, 4.5 A peak), two LDOs (1.8 V/400 mA and 3.3 V/400 mA), BOOST converter (5.0 V, 1.5 A peak), and safety monitoring circuitry. It supports radar and ADAS domain controller power architectures with SPI/I²C control, frequency synchronization, and fail-safe output.
For engineers reviewing the MC33FS8405G0KSR2 datasheet, MC33FS8405G0KSR2 pinout, MC33FS8405G0KSR2 application, or MC33FS8405G0KSR2 equivalent, this device delivers functional safety for 12 V/24 V automotive systems requiring multi-rail sequencing, EMC-optimized switching, voltage supervision, and fail-safe state machine coordination with MCU-level monitoring via FCCU and watchdog interfaces.
Technical Context
The MC33FS8405G0KSR2 implements a hierarchical power management architecture: VPRE controls external high-side MOSFETs for primary 12 V/24 V input regulation; BUCK1 supplies MCU core at 1.1 V with SVS capability; dual LDOs deliver clean IO and ADC rails; BOOST provides 5.0 V for PHY or interface ICs. All regulators support configurable soft-start, overvoltage/undervoltage detection, and thermal shutdown with DFS escalation.
Safety logic includes dedicated ASIL B–compliant fault collection (FCCU), challenger watchdog, PGOOD/RSTB assertion, fail-safe output (FS0B), and ABIST/LBIST self-test. Power sequencing is managed across six slots via OTP-programmed start/stop timing, with TSD-triggered regulator shutdown plus deep fail-safe autoretry (infinite cycles).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 60 V DC max - supports 12 V and 24 V battery systems with reverse-battery protection diodes on VSUP1/VSUP2. |
| VPRE Controller Output | Configurable; MC33FS8405G0KSR2 uses 3.3 V VPRE per OTP flavor G0 - drives external high-/low-side MOSFETs for primary buck stage. |
| BUCK1 Output | 1.1 V / 4.5 A peak - dedicated MCU core supply with static voltage scaling (SVS) and VCOREMON monitoring. |
| LDO1 / LDO2 Outputs | 1.8 V / 400 mA and 3.3 V / 400 mA - low-noise linear regulators for MCU IOs and analog subsystems. |
| BOOST Output | 5.0 V / 1.5 A peak - integrated low-side switch enables compact PHY or CAN transceiver supply. |
| Safety Certification | ASIL B compliant per ISO 26262; qualified to AEC-Q100 Grade 1 (−40 °C to +125 °C junction). |
| Interface | SPI or I²C (0x20 address) with CRC - enables real-time configuration, status readback, and fault logging. |
Pinout & Package
MC33FS8405G0KSR2 is housed in HVQFN56 package (8 mm × 8 mm × 0.85 mm, 0.5 mm pitch, wettable flank KS variant), with exposed thermal pad (EP) connected to GNDFS/GND.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 49 | WAKE2 / WAKE1 | Dual wake-up inputs with external series resistor support - enable system wake from OFF mode (10 µA IQ). |
| 14 | FS0B | Active-low open-drain fail-safe output - asserts during critical faults (TSD, OV/UV, watchdog timeout) to trigger MCU safety response. |
| 17 | VCOREMON | Analog input tied to BUCK1 output - enables precise core voltage supervision with 1.1 V ±1.5% OV/UV thresholds. |
| 18, 19 | PGOOD / RSTB | Active-low power-good and reset outputs - synchronized to BUCK1 startup; require external VDDIO pull-up. |
| 20, 24 | FIN / FOUT | Frequency sync input/output - allows daisy-chained SMPS clock alignment to reduce system EMI peaks. |
| 25–28 | MISO/MOSI/SCLK/CSB | Standard 4-wire SPI interface - supports CRC-protected register access and fault reporting at up to 10 MHz. |
| 30, 31 | FCCU2 / FCCU1 | Dedicated MCU error monitoring inputs - detect external MCU lockup or error flags for coordinated fail-safe escalation. |
| 43, 45 | PRE_GLS / PRE_GHS | VPRE gate drivers - drive external N-channel high-side and low-side MOSFETs for primary buck conversion. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-rail power sequencing | OTP-configurable 6-slot sequencing engine - ensures correct startup/shutdown order across BUCK1, LDOs, BOOST, and VPRE stages. |
| EMC optimization | SMPS frequency synchronization (FIN/FOUT), spread spectrum, and slew rate control - reduces conducted/radiated emissions in radar/ADAS ECU designs. |
| Fail-safe state machine | Independent monitoring circuitry with infinite-deep-fail-safe autoretry - maintains safe state without MCU intervention during critical faults. |
| Low-power OFF mode | 10 µA typical quiescent current - enables always-on wake-up capability while meeting automotive standby power budgets. |
| Configurable supervision | Five independent voltage monitors (VCOREMON, VDDIOMON, VMON1–VMON4) with programmable OV/UV thresholds and deglitch times - supports custom rail health checks. |
Applications
| Radar Sensor Power Supply | ADAS Domain Controller |
|---|---|
Use Scenario: Powers NXP S32R274/S32R294 radar SoCs with multiple voltage rails (core, IO, PHY, memory). IC Role / Device Role / Timing Role: Primary SBC providing VPRE-controlled 12 V→3.3 V pre-regulation, BUCK1 for 1.1 V core, LDO2 for 3.3 V IO, and BOOST for 5.0 V TEF810x RF front-end. Use Value: Enables ASIL B–compliant power delivery with synchronized switching, fail-safe output assertion on TSD/OV, and wake-on-radar-event capability. |
Use Scenario: Centralized power management for multi-SoC ADAS domain controllers (e.g., S32G + S32R). IC Role / Device Role / Timing Role: Integrates all non-isolated rails (core, IO, ADC, PHY) and coordinates sequencing across heterogeneous processors via SPI-managed slot timing. Use Value: Reduces BOM count by consolidating 6+ discrete regulators; supports functional safety partitioning with FCCU monitoring and fail-safe output to safety MCU. |
| Vision System (Camera ECU) | Infotainment Head Unit |
Use Scenario: Supplies NXP S32V-based mono/stereo camera modules with low-noise analog and digital rails. IC Role / Device Role / Timing Role: Delivers 1.1 V BUCK1 for vision processor core, 1.8 V LDO1 for MIPI CSI-2 IO, 3.3 V LDO2 for image sensor bias, and 5.0 V BOOST for USB PHY. Use Value: Achieves <10 mVpp output ripple on LDOs and tight sequencing (±250 µs slot resolution) to prevent camera boot glitches. |
Use Scenario: Powers infotainment SoCs (e.g., i.MX8) and companion ICs (audio codecs, display drivers, CAN transceivers). IC Role / Device Role / Timing Role: Provides robust 12 V→3.3 V/1.8 V/5.0 V conversion with wide-input tolerance, wake-on-USB/CAN, and fail-safe reset during brownout. Use Value: Meets AEC-Q100 Grade 1 requirements for under-hood temperature operation and supports fast wake-from-sleep (<100 ms full rail ramp). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33FS8410G0KSR2 | Adds BUCK3 (3.3 V/4.5 A) - expands rail count for multi-core SoCs or external DDR termination. | Required when third SMPS rail needed beyond BUCK1 + LDOs + BOOST (e.g., DDR VTT or auxiliary processor). | Select MC33FS8410G0KSR2 if BUCK3 is required; otherwise MC33FS8405G0KSR2 minimizes cost and layout area. |
| MC33FS8500A0KSR2 | ASIL D–rated; adds FCCU monitoring, enhanced ABIST coverage, and dual watchdog (challenger + simple). | Required for ASIL D–targeted systems (e.g., steering/braking domain controllers) where fault coverage >90% is mandated. | Choose MC33FS8500A0KSR2 only when ASIL D compliance is contractually required; MC33FS8405G0KSR2 satisfies ASIL B with lower complexity. |
Compared with MC33FS8410G0KSR2 and MC33FS8500A0KSR2, MC33FS8405G0KSR2 offers optimal ASIL B functionality for radar and domain controller applications where BUCK2/BUCK3 are unnecessary - reducing bill-of-materials cost, PCB footprint, and thermal load without compromising safety integrity or feature set.
Availability
MC33FS8405G0KSR2 is available at Aetrix Electronics and suitable for radar sensor modules, ADAS domain controllers, and vision ECUs requiring stable component supply, long-term automotive qualification, and fail-safe power architecture support.
Supply support for MC33FS8405G0KSR2 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 processors and power management ICs.
The FS84 family, including MC33FS8405G0KSR2, was designed specifically for ASIL B automotive power domains - delivering integrated, safety-certified multi-rail regulation for radar, vision, and domain controller ECUs with minimal external components.
FAQ
What safety certifications apply to the MC33FS8405G0KSR2?
The MC33FS8405G0KSR2 is developed in compliance with ISO 26262 for ASIL B functional safety and qualified per AEC-Q100 Grade 1 (−40 °C to +125 °C). It includes built-in self-test (ABIST/LBIST), challenger watchdog, FCCU monitoring inputs, and fail-safe output (FS0B) to meet automotive safety goals without external safety microcontroller dependency. MC33FS8405G0KSR2 does not support ASIL D.
Does the MC33FS8405G0KSR2 support multi-phase operation?
No, the MC33FS8405G0KSR2 does not support multi-phase operation. Its BUCK1 converter is single-phase only (1.1 V, 4.5 A peak). Multi-phase capability with BUCK1 is explicitly documented only for FS8420/FS8425/FS8430 variants that include BUCK2 - which MC33FS8405G0KSR2 omits per Table 1 (FS8405 option: BUCK1 = Yes, BUCK2 = No, BUCK3 = No). MC33FS8405G0KSR2 relies on VPRE for high-current primary regulation instead.
What is the function of the PSYNC pin on the MC33FS8405G0KSR2?
The PSYNC pin (Pin 38) on MC33FS8405G0KSR2 operates as a bidirectional power synchronization signal. In master mode, it outputs a clock to synchronize switching of external PMICs; in slave mode, it accepts an external clock to align MC33FS8405G0KSR2's SMPS frequencies - reducing beat frequencies and improving system-level EMC performance. PSYNC is disabled by default and enabled via OTP configuration.
Can the MC33FS8405G0KSR2 be used in 24 V commercial vehicle applications?
Yes, the MC33FS8405G0KSR2 supports 60 V DC maximum input voltage and is qualified for 12 V and 24 V automotive applications. Its VSUP1/VSUP2 inputs require external reverse-battery protection diodes, and its VPRE controller is configured for 3.3 V output in the G0 OTP variant - enabling robust primary regulation across cold-crank (4.5 V) to load-dump (40 V) transients common in 24 V commercial vehicles. MC33FS8405G0KSR2 meets AEC-Q100 Grade 1 for extended temperature operation.
How is the fail-safe output (FS0B) triggered on the MC33FS8405G0KSR2?
The FS0B pin (Pin 14) on MC33FS8405G0KSR2 asserts low during critical faults including thermal shutdown (TSD), overvoltage/undervoltage on monitored rails (VCOREMON, VDDIOMON, VMON1–VMON4), watchdog timeout, or FCCU-detected MCU failure. It remains asserted until fault clearance and manual reset or power cycle. The fail-safe state machine executes infinite autoretry - maintaining FS0B active while attempting internal recovery - ensuring deterministic behavior during safety-critical events. MC33FS8405G0KSR2 does not support configurable FS0B deassertion delay.
MC33FS8405G0KSR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- System Basis Chip
- Current - Supply:
- 15mA
- Voltage - Supply:
- 60V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 56-HVQFN (8x8)
MC33FS8405G0KSR2 FAQ
1.How can I place an order for MC33FS8405G0KSR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33FS8405G0KSR2 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 MC33FS8405G0KSR2 reliable?
The price and inventory of MC33FS8405G0KSR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33FS8405G0KSR2 is usually 5 days.
3.What payment methods are accepted for MC33FS8405G0KSR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33FS8405G0KSR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33FS8405G0KSR2?
MC33FS8405G0KSR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33FS8405G0KSR2 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 MC33FS8405G0KSR2?
For technical support, including MC33FS8405G0KSR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33FS8405G0KSR2 requirements.
6.How does Aetrix verify that MC33FS8405G0KSR2 is sourced from the original manufacturer or authorized distributors?
All MC33FS8405G0KSR2 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 MC33FS8405G0KSR2 meets industry standards.
7.What is the process for return or replacement of MC33FS8405G0KSR2?
All MC33FS8405G0KSR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC33FS8405G0KSR2, 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 MC33FS8405G0KSR2 part is unused and in its original packaging.
Return procedure for MC33FS8405G0KSR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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