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NXP Semiconductors MC33FS8435G0KS
- Part No.:
- MC33FS8435G0KS
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
MC33FS8435G0KS.pdf
- Description:
- SAFETY POWER MANAGEMENT IC, QFN5
- Quantity:
- Payment:
- Shipping:
Inventory:4,858
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Product details
Overview
MC33FS8435G0KS from NXP Semiconductors is an ASIL B–capable automotive fail-safe system basis chip (SBC) integrating three synchronous buck converters (BUCK1/2/3), one boost converter, two LDOs, and comprehensive safety monitoring. It delivers up to 3.6 A per buck rail, supports 60 V DC input, and features SPI/I²C control, frequency synchronization (FIN/FOUT), and a dedicated fail-safe output (FS0B). It is designed for radar, vision, and ADAS domain controller power architectures requiring functional safety and multi-rail sequencing.
For engineers reviewing the MC33FS8435G0KS datasheet, MC33FS8435G0KS pinout, MC33FS8435G0KS application, or MC33FS8435G0KS equivalent, key selection criteria include its triple-buck + boost + dual-LDO topology, ASIL B compliance, HVQFN56 wettable flank package, OTP-configurable voltage/frequency/sequencing, and integrated fail-safe state machine with PGOOD/RSTB/INTB signaling.
Technical Context
The MC33FS8435G0KS implements a hierarchical power management architecture with independent control loops for each regulator: BUCK1 (MCU core supply, SVS-capable), BUCK2 and BUCK3 (configurable low-voltage rails), BOOST (integrated low-side switch), and LDO1/LDO2 (400 mA each for I/O and ADC). All SMPS operate at 2.22 MHz switching frequency with phase-shifting capability for EMI reduction.
Safety functionality includes analog/digital voltage supervision (VCOREMON, VMON1–VMON4), thermal shutdown (TSD) response per rail, fail-safe output driver (FS0B), watchdog (simple WD), FCCU interface for MCU error monitoring, and built-in self-test (ABIST/LBIST). Power-up sequencing is programmable across eight slots with configurable start/stop timing and deep fail-safe autoretry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.9 V to 60 V DC - supports 12 V and 24 V automotive battery systems with reverse-battery protection diodes on VSUP1/VSUP2. |
| BUCK1 Output | 1.8 V @ 4.5 A peak - dedicated MCU core supply with SVS and soft-start slope of 7.81 mV/µs. |
| BUCK2 & BUCK3 Outputs | Configurable 1.2 V–3.3 V @ 4.5 A peak each - support multi-phase operation (BUCK1+BUCK2) up to 7.2 A on single rail. |
| BOOST Output | 5.0 V @ 1.5 A peak - integrated low-side switch enables compact high-efficiency bias generation. |
| LDO1 / LDO2 | 1.8 V / 3.3 V @ 400 mA DC - independently configurable for MCU I/O and analog subsystems. |
| Safety Certification | ASIL B compliant per ISO 26262 - qualified to AEC-Q100 Grade 1 (−40 °C to +125 °C ambient). |
| Interface | SPI or I²C (0x20 address) with CRC - enables real-time configuration, fault reporting, and register readback. |
Pinout & Package
HVQFN56 plastic thermal-enhanced very thin quad flat package; 8 mm × 8 mm × 0.85 mm body; 0.5 mm pitch; exposed pad (EP) for thermal and GND connection; dimple wettable flank (KS suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BUCK1_SW / BUCK2_SW / BUCK3_SW | Switching node outputs | Drive external inductors; require low-ESR ceramic output capacitors and proper layout for EMI control. |
| FS0B | Fail-safe output | Active-low open-drain signal indicating system-level fault condition; requires external pull-up to VDDIO. |
| PGOOD / RSTB / INTB | Status outputs | Power-good, reset, and interrupt signals with active-low polarity; all require VDDIO pull-up for logic-level compatibility. |
| FIN / FOUT | Frequency sync I/O | Enables synchronized switching across multiple FS84/FS85 devices or external PMICs to reduce conducted EMI peaks. |
| VCOREMON / VMON1–VMON4 | Analog monitoring inputs | Connect directly to regulated outputs for over/under-voltage detection with programmable thresholds and deglitch timing. |
| PSYNC | Power sync I/O | Configurable as input or output to coordinate power-up sequencing between two FS84/FS85 devices or with external PMICs. |
Key Features
| Feature | Design Value |
|---|---|
| Triple synchronous buck + boost + dual-LDO integration | Reduces bill-of-materials and PCB area versus discrete PMIC solutions while maintaining rail independence and sequencing control. |
| OTP-programmable regulator settings | Enables custom voltage, current limit, soft-start, and sequencing without hardware changes-supports engineering mode emulation via GUI. |
| EMC optimization suite | Includes spread spectrum, slew rate control, manual frequency tuning, and FIN/FOUT synchronization for robust system-level EMC compliance. |
| Fail-safe state machine with DFS autoretry | Provides deterministic response to faults (TSD, OV/UV, watchdog timeout) with infinite retry or x15 deep fail-safe mode per configuration. |
| ASIL B safety architecture | Integrates dedicated monitoring circuits (FCCU, ABIST, ERRMON), independent voltage supervisors, and fail-safe output for safety-critical partitioning. |
Applications
| Radar Sensor Power Supply | Vision System Power Architecture |
|---|---|
Use Scenario: Powers NXP S32R294 radar MCU and TEF810x RF transceiver in 12 V/24 V automotive radar modules. IC Role / Device Role / Timing Role: Primary SBC providing sequenced BUCK1 (1.03125 V core), BUCK3 (3.3 V PHY), LDO2 (3.3 V I/O), and BOOST (5.0 V bias) with fail-safe monitoring. Use Value: Enables single-chip power solution meeting ASIL B requirements while reducing component count and improving startup reliability under cold-crank conditions. | Use Scenario: Supplies NXP S32V vision processor and PF8x companion PMIC in mono/stereo camera ECUs. IC Role / Device Role / Timing Role: Delivers BUCK1 (1.8 V core), BUCK2 (1.2 V memory), LDO1 (1.8 V I/O), and LDO2 (3.3 V ADC) with slot-based sequencing and VCOREMON supervision. Use Value: Supports dynamic voltage scaling (DVS) and precise rail timing alignment required for image sensor synchronization and low-latency processing. |
| ADAS Domain Controller Power Hub | Infotainment Head Unit Power Management |
Use Scenario: Centralized power management for multi-processor ADAS domain controllers integrating radar, vision, and fusion compute. IC Role / Device Role / Timing Role: Manages eight power domains via programmable sequencing slots, monitors six voltage rails (VCOREMON, VMON1–VMON4, VDDIOMON), and asserts FS0B on critical fault. Use Value: Eliminates need for external sequencers and discrete supervisors, simplifying design while ensuring ISO 26262-compliant safety partitioning. | Use Scenario: Powers infotainment head units with display, audio DSP, and connectivity modules (Wi-Fi/BT) in premium vehicle platforms. IC Role / Device Role / Timing Role: Provides BUCK1 (1.2 V SoC core), BUCK3 (1.8 V memory), LDO1 (2.5 V audio codec), LDO2 (3.3 V display interface), and wake-up detection on WAKE1/WAKE2. Use Value: Achieves <10 µA quiescent current in OFF mode while supporting fast wake-up (<100 µs) and robust brown-out recovery for always-on features. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33FS8430G0KS | Omits FCCU safety monitor and supports only up to 2 VMON inputs vs. 4 on MC33FS8435G0KS. | Targeted for simpler ASIL B systems without MCU error monitoring or multi-rail supervision. | Select when FCCU and full VMON coverage are not required to reduce cost and complexity. |
| MC33FS8530A0KS | ASIL D–rated version with enhanced safety features including dual-channel FCCU, extended ABIST coverage, and higher diagnostic coverage. | Required for ASIL D–compliant domain controllers, zonal gateways, or safety-critical actuation systems. | Choose when full ISO 26262 ASIL D decomposition and certification evidence are mandatory. |
Compared with MC33FS8430G0KS, MC33FS8435G0KS adds FCCU and full four-rail voltage monitoring for tighter MCU coupling and fault isolation; compared with MC33FS8530A0KS, it reduces safety overhead and cost while retaining ASIL B integrity for radar/vision subsystems.
Availability
MC33FS8435G0KS is available at Aetrix Electronics and suitable for radar sensor modules, vision processing units, and ADAS domain controllers requiring stable component supply, long-term automotive qualification, and functional safety compliance.
Supply support for MC33FS8435G0KS 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 product line delivers ASIL B–certified system basis chips optimized for radar, vision, and ADAS subsystems, emphasizing integrated safety, EMC robustness, and flexible OTP configuration for rapid platform adaptation.
FAQ
What is the primary safety classification and qualification status of the MC33FS8435G0KS?
The MC33FS8435G0KS is ASIL B–capable per ISO 26262 and qualified to AEC-Q100 Grade 1 (−40 °C to +125 °C ambient). It includes integrated safety mechanisms such as VCOREMON, VMON1–VMON4, FCCU interface, simple watchdog, and fail-safe output (FS0B), all validated for automotive safety-critical subsystems. The device supports fail-safe state machine operation with configurable deep fail-safe autoretry behavior.
How does the MC33FS8435G0KS support power supply sequencing for multi-rail automotive processors?
The MC33FS8435G0KS implements an eight-slot programmable power sequencing engine where each regulator (BUCK1/2/3, LDO1/2, BOOST) can be assigned to a specific start/stop slot with configurable delay. This enables precise timing alignment-for example, powering BUCK1 (MCU core) before BUCK2 (memory) and after LDO1 (I/O)-ensuring correct boot order and avoiding latch-up in complex SoCs like NXP S32R or S32V processors.
Can the MC33FS8435G0KS be used in both 12 V and 24 V automotive battery systems?
Yes, the MC33FS8435G0KS supports 4.9 V to 60 V DC input across VSUP1 and VSUP2 pins, making it compatible with both 12 V and 24 V battery architectures. External reverse-battery protection diodes are mandatory on both inputs. Its wide input range ensures reliable operation during cold-crank (down to 4.9 V) and load-dump (up to 60 V) transients common in automotive environments.
What interfaces does the MC33FS8435G0KS provide for configuration and diagnostics?
The MC33FS8435G0KS supports both SPI and I²C interfaces (default I²C address 0x20) with CRC protection for register access, OTP programming, fault logging, and real-time monitoring. Diagnostic capabilities include PGOOD, RSTB, INTB, and FS0B outputs, plus analog multiplexed output (AMUX) for ADC-based parameter readback (e.g., temperature, rail voltages). All interfaces operate from VDDIO (1.8 V–5.5 V) for MCU I/O compatibility.
What is the role of the PSYNC pin on the MC33FS8435G0KS, and how is it used in multi-device configurations?
The PSYNC pin on the MC33FS8435G0KS serves as a bidirectional power synchronization signal to coordinate startup sequencing between two MC33FS8435G0KS devices or between an MC33FS8435G0KS and an external PMIC. In master-slave configuration, the master asserts PSYNC to trigger aligned power-up of slave regulators, eliminating staggered inrush currents and simplifying system-level timing validation for complex multi-PMIC designs.
MC33FS8435G0KS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Tray
- 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)
MC33FS8435G0KS FAQ
1.How can I place an order for MC33FS8435G0KS through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33FS8435G0KS 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 MC33FS8435G0KS reliable?
The price and inventory of MC33FS8435G0KS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33FS8435G0KS is usually 5 days.
3.What payment methods are accepted for MC33FS8435G0KS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33FS8435G0KS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33FS8435G0KS?
MC33FS8435G0KS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33FS8435G0KS 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 MC33FS8435G0KS?
For technical support, including MC33FS8435G0KS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33FS8435G0KS requirements.
6.How does Aetrix verify that MC33FS8435G0KS is sourced from the original manufacturer or authorized distributors?
All MC33FS8435G0KS 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 MC33FS8435G0KS meets industry standards.
7.What is the process for return or replacement of MC33FS8435G0KS?
All MC33FS8435G0KS units undergo pre-shipment inspection (PSI). If there is an issue with MC33FS8435G0KS, 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 MC33FS8435G0KS part is unused and in its original packaging.
Return procedure for MC33FS8435G0KS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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