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NXP Semiconductors MC33FS8520A0ESR2
- Part No.:
- MC33FS8520A0ESR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Power Management - Specialized
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
MC33FS8520A0ESR2.pdf
- Description:
- SAFETY POWER MANAGEMENT IC, QFN5
- Quantity:
- Payment:
- Shipping:
Inventory:2,487
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Product details
Overview
MC33FS8520A0ESR2 from NXP Semiconductors is an ASIL D–compliant automotive fail-safe system basis chip (SBC) integrating a VPRE synchronous buck controller, two low-voltage synchronous buck converters (BUCK1 and BUCK2), 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, fail-safe output, and power synchronization for radar domain controllers.
For engineers reviewing the MC33FS8520A0ESR2 datasheet, MC33FS8520A0ESR2 pinout, MC33FS8520A0ESR2 application, or MC33FS8520A0ESR2 equivalent, this device is selected for safety-critical ADAS power architectures requiring multi-rail sequencing, voltage supervision, EMC-optimized frequency sync, and integrated functional safety monitoring per ISO 26262.
Technical Context
The MC33FS8520A0ESR2 implements a dual-buck architecture with BUCK1 dedicated to MCU core supply (SVS-capable) and BUCK2 supporting multi-phase operation with BUCK1 to extend current capability to 7.2 A peak on a single rail. It includes a BOOST converter with integrated low-side switch and configurable output up to 5.74 V.
Safety architecture comprises independent monitoring circuitry, challenger watchdog, FCCU interface for MCU error detection, built-in self-test (ABIST/LBIST), and fail-safe output (FS0B) with deep fail-safe autoretry. Power-up sequencing is programmable across eight slots, and all regulators support soft-start with defined dV/dt (e.g., 7.81 mV/µs for BUCK1).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 60 V DC max - supports both 12 V and 24 V automotive battery systems with reverse-battery protection diodes required on VSUP1/VSUP2. |
| BUCK1 Output | 1.1 V @ 4.5 A peak - configured for MCU core supply with SVS monitoring and slot-based power sequencing. |
| BUCK2 Output | 1.8 V @ 4.5 A peak - enabled in FS8520 variant; supports multiphase operation with BUCK1 for extended current delivery. |
| BOOST Output | 5.0 V @ 1.5 A peak - integrated low-side switch; used for PHY or sensor biasing with configurable voltage and slew rate. |
| LDO Outputs | Two 400 mA LDOs (LDO1/LDO2) - configurable voltages (e.g., 2.5 V / 3.3 V); supply MCU I/Os and ADC reference rails. |
| Safety Certification | ISO 26262 ASIL D compliant - qualified per AEC-Q100 Grade 1 (−40 °C to +125 °C), with fail-safe state machine and DFS autoretry. |
| Interface | SPI or I²C (0x20 address) with CRC - enables real-time configuration, fault reporting, and regulator control during runtime. |
Pinout & Package
MC33FS8520A0ESR2 is housed in a HVQFN56 package (8 mm × 8 mm × 0.85 mm, 0.5 mm pitch) with wettable flank (ES suffix) and exposed thermal pad (EP) connected to GNDFS/GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSUP1 / VSUP2 | Main power inputs | Accept 60 V DC input; require external reverse-battery protection diodes per AEC-Q100 compliance. |
| BUCK1_IN / BUCK2_IN | Buck input rails | Low-voltage inputs (typically 5 V–12 V) feeding synchronous buck stages; routed to internal high-side/low-side drivers. |
| BUCK1_SW / BUCK2_SW | Switching nodes | Connect to external inductors; switching at 2.22 MHz (configurable); require proper layout for EMI suppression. |
| VCOREMON / VMON1–VMON4 | Voltage monitoring inputs | Monitor BUCK1 output and up to four external rails; support OV/UV detection with programmable thresholds and deglitch times. |
| FS0B | Fail-safe output | Active-low open-drain signal indicating safety state; drives external reset logic or failsafe actuator upon fault detection. |
| SPI/I²C pins (MOSI, MISO, SCLK, CSB, SDA, SCL) | Digital control interface | Enable full configuration, telemetry readback, and safety status reporting; include CRC for data integrity. |
| PSYNC | Power sync I/O | Allows synchronized switching of multiple MC33FS8520A0ESR2 devices or coordination with external PMICs to reduce system-level ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-rail power management | Integrated VPRE controller + BUCK1/BUCK2/BOOST + dual LDOs - eliminates need for discrete PMICs in radar domain controllers. |
| Functional safety architecture | Dedicated FCCU inputs, challenger watchdog, ABIST/LBIST, and fail-safe output - satisfies ASIL D decomposition requirements without external safety monitor. |
| EMC-optimized switching | Frequency synchronization (FIN/FOUT), spread spectrum, and slew rate control - reduces radiated emissions in sensitive radar bands. |
| Configurable power sequencing | Eight-slot sequencing engine with per-regulator start/stop assignment - ensures correct boot order for S32R274/S32K3 MCUs and companion sensors. |
| OTP-programmable configuration | Factory-programmed BUCK/LDO voltages, current limits, and safety thresholds - enables hardware-level customization without firmware changes. |
Applications
| Radar Domain Controller | ADAS Camera Module |
|---|---|
|
Use Scenario: Powers NXP S32R274 MCU, TEF810x radar transceiver, and auxiliary sensors in corner/imaging radar units. IC Role / Device Role / Timing Role: Primary SBC providing sequenced 1.1 V (core), 1.8 V (peripheral), 5.0 V (PHY), and 3.3 V (ADC) rails with fail-safe assertion on fault. Use Value: Enables ASIL D compliance via integrated safety monitoring, eliminating external watchdog and voltage supervisors while reducing BOM count by ≥3 components. |
Use Scenario: Supplies NXP S32V234 vision processor, image sensor, and ISP in mono/stereo camera modules. IC Role / Device Role / Timing Role: Delivers tightly regulated 1.03 V core, 1.2 V I/O, and 2.5 V analog rails with soft-start slope control to prevent inrush-induced MCU brownout. Use Value: Achieves <10 µA quiescent current in OFF mode and supports wake-on-WAKE1/WAKE2 for low-power parking surveillance. |
| Automotive Gateway | Infotainment Head Unit |
|
Use Scenario: Powers MPC5748G or S32K3-based gateway ECUs managing CAN FD, Ethernet, and LIN communication stacks. IC Role / Device Role / Timing Role: Provides isolated 1.2 V, 3.3 V, and 5.0 V rails with PSYNC-driven synchronization across dual FS85 devices to suppress common-mode noise on high-speed buses. Use Value: Reduces conducted EMI on CAN FD transceivers by >15 dB through synchronized switching, improving bus robustness in noisy chassis environments. |
Use Scenario: Supplies application processor, display driver, audio codec, and touch controller in central infotainment units. IC Role / Device Role / Timing Role: Manages power-up sequence across 7+ rails including DDR memory, GPU, and HDMI PHY using OTP-configured slot timing. Use Value: Eliminates external sequencing ICs and reduces startup time by 40% versus discrete LDO/buck solutions due to integrated multi-rail coordination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33FS8530A0ESR2 | Includes BUCK3 (1.2 V @ 2.6 A) and four VMON inputs; higher integration than FS8520. | Required for systems needing third buck rail (e.g., S32R294 + dual TEF82xx radar front-ends). | Select when BUCK3 is needed for additional low-noise analog or interface rail beyond BUCK1/BUCK2/BOOST. |
| MC33FS8420G0ESR2 | ASIL B rated; lacks FCCU, challenger WD, and deep fail-safe autoretry; same BUCK1/BUCK2 topology. | Suitable for non-safety-critical body control or lighting modules where ASIL D is not mandated. | Choose for cost-sensitive ASIL B designs where functional safety overhead is unnecessary and BOM reduction remains critical. |
Compared with MC33FS8530A0ESR2, MC33FS8520A0ESR2 offers identical ASIL D safety features and BUCK1/BUCK2 performance but omits BUCK3-reducing solution size and cost for radar systems requiring only two low-voltage rails. Versus MC33FS8420G0ESR2, it adds full ASIL D monitoring, fail-safe assertion, and deeper diagnostic coverage essential for domain controller deployment.
Availability
MC33FS8520A0ESR2 is available at Aetrix Electronics and suitable for radar domain controllers, ADAS camera modules, and automotive gateways requiring stable component supply, long-term automotive qualification, and ISO 26262-compliant power management.
Supply support for MC33FS8520A0ESR2 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 microcontrollers and power management.
The FS85 family-including MC33FS8520A0ESR2-is designed specifically for ASIL D–compliant ADAS domain controllers, radar, and vision systems, delivering integrated power, safety, and communication in a single package.
FAQ
What is the maximum input voltage supported by the MC33FS8520A0ESR2?
The MC33FS8520A0ESR2 supports a maximum input voltage of 60 V DC on its VSUP1 and VSUP2 pins, enabling direct connection to 12 V and 24 V automotive battery systems. External reverse-battery protection diodes are mandatory per AEC-Q100 qualification requirements.
Does the MC33FS8520A0ESR2 include a fail-safe output, and how is it implemented?
Yes, the MC33FS8520A0ESR2 includes an active-low open-drain fail-safe output (FS0B, Pin 14) driven by its integrated fail-safe state machine. It asserts during detected faults-including overvoltage, undervoltage, thermal shutdown, or watchdog timeout-and supports deep fail-safe autoretry with infinite retry cycles per configuration.
Can the MC33FS8520A0ESR2 be used with both SPI and I²C interfaces?
Yes, the MC33FS8520A0ESR2 supports both SPI and I²C communication protocols. Its default I²C address is 0x20, and it includes CRC protection on all transactions. Interface selection is determined by hardware strap or OTP configuration, and both support full register access for configuration, monitoring, and fault reporting.
What safety certifications apply to the MC33FS8520A0ESR2?
The MC33FS8520A0ESR2 is developed in compliance with ISO 26262 for ASIL D applications and qualified per AEC-Q100 Grade 1 (−40 °C to +125 °C). It includes ABIST/LBIST, challenger watchdog, FCCU monitoring inputs, and fail-safe output-enabling end-system ASIL D compliance without external safety components.
How does the MC33FS8520A0ESR2 handle power sequencing for multi-rail systems?
The MC33FS8520A0ESR2 implements an eight-slot power sequencing engine, allowing each regulator (BUCK1, BUCK2, BOOST, LDO1, LDO2) to be assigned a specific start/stop slot. Sequencing is controlled via OTP programming or runtime SPI commands, ensuring precise timing alignment for complex MCUs like S32R274 and S32K3.
MC33FS8520A0ESR2 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 56-HVQFN (8x8)
MC33FS8520A0ESR2 FAQ
1.How can I place an order for MC33FS8520A0ESR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33FS8520A0ESR2 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 MC33FS8520A0ESR2 reliable?
The price and inventory of MC33FS8520A0ESR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33FS8520A0ESR2 is usually 5 days.
3.What payment methods are accepted for MC33FS8520A0ESR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33FS8520A0ESR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33FS8520A0ESR2?
MC33FS8520A0ESR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33FS8520A0ESR2 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 MC33FS8520A0ESR2?
For technical support, including MC33FS8520A0ESR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33FS8520A0ESR2 requirements.
6.How does Aetrix verify that MC33FS8520A0ESR2 is sourced from the original manufacturer or authorized distributors?
All MC33FS8520A0ESR2 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 MC33FS8520A0ESR2 meets industry standards.
7.What is the process for return or replacement of MC33FS8520A0ESR2?
All MC33FS8520A0ESR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC33FS8520A0ESR2, 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 MC33FS8520A0ESR2 part is unused and in its original packaging.
Return procedure for MC33FS8520A0ESR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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