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NXP Semiconductors MC35XS3500PNA
- Part No.:
- MC35XS3500PNA
- Manufacturer:
- NXP Semiconductors
- Package:
- 24-PowerQFN
- Datasheet:
-
MC35XS3500PNA.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:6 24PQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,820
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Product details
Overview
MC35XS3500PNA from NXP Semiconductors (formerly Freescale) is a penta-channel automotive high-side smart power switch IC designed for rear corner lighting control. It integrates five 35 mΩ RDS(ON) MOSFETs, 16-bit SPI interface (3.3 V/5.0 V compatible), per-channel PWM dimming, and comprehensive diagnostics-including over-current, open-load, over-temperature, and reverse-polarity protection. It operates in -40 °C to +125 °C ambient and drives resistive and LED loads in smart rear lamp modules.
For engineers reviewing the MC35XS3500PNA datasheet, MC35XS3500PNA pinout, MC35XS3500PNA application, or MC35XS3500PNA equivalent, key selection considerations include its 24-pin PQFN package, integrated current sense output (CSNS) with temperature feedback, fail-safe mode with autorestart, multiphase edge shaping for EMC compliance, and robust VBAT tolerance up to 40 V during load dump.
Technical Context
The MC35XS3500PNA implements a fully protected high-side switching architecture with five independent output drivers, each featuring programmable slew-rate control (SR bit selectable) and synchronized turn-on/off timing to minimize EMI. Its internal charge pump enables gate drive above VBAT, supporting full enhancement of external and internal MOSFETs without auxiliary supply.
Diagnostic functionality is tightly coupled with SPI register mapping: real-time current sensing via CSNS (multiplexed across OUT1–OUT5, FETIN, and GND flag temperature), fault latching with configurable interrupt reporting (via LIMP, FLASHER, STOP inputs), and watchdog timeout (75 ms typical) for SPI communication failure detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RDS(ON) (per channel) | 35 mΩ @ 2.8 A, 13.5 V, 25 °C - enables low-loss driving of tail/stop/flasher bulbs and LEDs at high efficiency |
| VBAT max rating | 40 V - withstands automotive load-dump transients without external clamping |
| SPI interface | 16-bit, 3.3 V/5.0 V logic - supports daisy-chaining for multi-device systems and MCU firmware-controlled configuration |
| Current sense accuracy | ±6.0% over -40 to +125 °C with one-point calibration - enables reliable closed-loop LED current regulation and fault detection |
| Thermal shutdown | 175 °C typical junction threshold - protects against thermal runaway during sustained overload or poor heatsinking |
| Output slew rate control | Selectable (SR=0/1) - reduces EMI emissions by shaping edge transitions for EMC-compliant PCB layout |
| Operating temp range | -40 °C to +125 °C ambient - qualified for under-hood and rear-lamp module placement in passenger and commercial vehicles |
Pinout & Package
The MC35XS3500PNA is housed in a 24-pin, 12 mm × 12 mm power-enhanced PQFN package with exposed thermal pad (bottom side), optimized for automotive thermal cycling and high-power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1–OUT5 | High-side power outputs | Protected 35 mΩ switches driving tail, license, stop, and flasher lamps; support PWM dimming and diagnostic current sensing |
| FETOUT / FETIN | External MOSFET interface | FETOUT controls an external SMART MOSFET (OUT6); FETIN provides current recopy for external switch monitoring |
| CSNS | Analog current/temperature sense output | Single pin multiplexed to report proportional current for any output or FETIN, plus GND flag temperature (10.9 mV/°C typical) |
| CS, SCLK, SI, SO | SPI interface signals | Full-duplex 16-bit SPI with chip select, clock, master-out-slave-in, and master-in-slave-out - enables register read/write and fault status polling |
| IGN, RST, FLASHER, STOP, LIMP | Digital wake/fail-mode inputs | Active-high inputs with internal pull-downs; used for system wake-up, reset initialization, and hardware-triggered fail-safe activation |
| VBAT, VCC, GND (pins 14/17/23) | Power and ground | VBAT = battery input (7–28 V operation); VCC = 3.0–5.5 V logic supply; three GND pins must be shorted on PCB for low-impedance return path |
Key Features
| Feature | Design Value |
|---|---|
| Penta 35 mΩ high-side switches | Enables simultaneous control of five automotive lighting functions (tail, license, stop, flasher, spare) with minimal conduction loss and thermal rise |
| Multiphase PWM with prescaler | Supports synchronized, staggered turn-on of outputs to reduce peak current draw and improve EMC behavior in dense lamp modules |
| Integrated analog temperature feedback | GND flag sensing via CSNS delivers ±5.0 °C calibrated accuracy - allows real-time thermal derating without external sensor |
| Fail-safe mode with autorestart | Hardware-activated limp-home operation (e.g., reduced brightness or flashing) upon critical fault, with automatic recovery after 75 ms timeout |
| Reverse polarity & power net protection | Withstands -18 V reverse battery connection and monitors VBAT UV/OV flags - eliminates need for external protection diodes or TVS |
Applications
| Tail Light Control | Stop Light Activation |
|---|---|
Use Scenario: Driving rear combination lamps where tail light must remain illuminated continuously at regulated brightness during vehicle operation. IC Role / Device Role / Timing Role: MC35XS3500PNA acts as the primary high-side driver for OUT1, delivering stable 2.8 A current with 35 mΩ RDS(ON) and real-time current sensing via CSNS. Use Value: Enables precise LED current regulation (±6.0% accuracy) and open-load detection down to 65 mA - ensuring regulatory compliance and early fault identification. | Use Scenario: Activating brake lights with fast response, high reliability, and immunity to voltage transients during aggressive deceleration. IC Role / Device Role / Timing Role: MC35XS3500PNA uses OUT4 with programmable slew rate and <65 µs turn-on delay to meet ECE R7/SAE J1399 rise-time requirements. Use Value: Integrated over-current shutdown (35 A typical threshold) and 40 V load-dump tolerance prevent latch-up or damage during 12 V system surges. |
| License Plate Illumination | Flasher / Turn Signal Control |
Use Scenario: Powering low-power LED arrays for license plate lighting with consistent luminance across battery voltage variation (9–16 V). IC Role / Device Role / Timing Role: MC35XS3500PNA configures OUT2 in LED mode (RDS(ON) = 70 mΩ @ 1.5 A), using PWM_LIN range (5.5–96%) for smooth dimming. Use Value: Current sense full-scale range of 1.6 A (LED mode) and ±6.0% accuracy enable closed-loop brightness control without external shunt or op-amp. | Use Scenario: Controlling amber turn signal lamps requiring timed on/off cycling, thermal management, and fault reporting during bulb-out conditions. IC Role / Device Role / Timing Role: MC35XS3500PNA assigns OUT5 to flasher function, leveraging hardware LIMP input and SPI-configurable autorestart (75 ms period) for fail-safe blinking. Use Value: Open-load detection sensitivity of 4–20 mA (LED mode) and integrated temperature feedback allow detection of single-LED failures in multi-LED arrays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side smart switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC33883A | Single-channel 35 mΩ high-side switch; no integrated CSNS multiplexer or temperature feedback | Limited to one load; requires external sensing circuitry for diagnostics and thermal monitoring | Choose when only one output is needed and cost-per-channel is prioritized over integration |
| TPS4H160-Q1 | Quad-channel 160 mΩ switch; higher RDS(ON), no built-in PWM generator or multiphase control | Lower current capability (1.5 A continuous); lacks per-channel current sense and analog temperature reporting | Prefer for lower-power interior lighting where EMC shaping and thermal telemetry are non-critical |
Compared with MC33883A and TPS4H160-Q1, the MC35XS3500PNA delivers superior integration-five channels, unified CSNS diagnostics, GND flag temperature sensing, and multiphase PWM-making it optimal for compact, high-reliability rear lamp modules requiring minimal external components and full functional safety coverage.
Availability
MC35XS3500PNA is available at Aetrix Electronics and suitable for automotive rear lighting systems, industrial warning beacons, and commercial vehicle signaling applications requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for MC35XS3500PNA 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 focused on secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in automotive power management and functional safety.
The MC35XS3500PNA belongs to NXP's Smart Power Switch family, engineered specifically for ASIL-B compliant rear lighting control-emphasizing diagnostic completeness, thermal resilience, and EMC robustness in harsh automotive environments.
FAQ
What is the maximum VBAT transient voltage the MC35XS3500PNA can withstand?
The MC35XS3500PNA is rated for 40 V load-dump transients per JEDEC JESD22-A114 (400 ms duration at 25 °C). Its internal clamp structure and robust gate drive design ensure continued operation without latch-up or permanent damage during ISO 7637-2 Pulse 5a events. This specification is validated across the full -40 °C to +125 °C operating range and applies directly to the MC35XS3500PNA device.
Does the MC35XS3500PNA support daisy-chained SPI communication?
Yes, the MC35XS3500PNA supports daisy-chained SPI communication via its SO (Master-In-Slave-Out) and SI (Master-Out-Slave-In) pins. When multiple MC35XS3500PNA devices are cascaded, the SO of one device connects to the SI of the next, allowing a single MCU SPI port to configure and monitor all units with minimal GPIO usage. This capability is explicitly documented in the "16-bit SPI communication interface with daisy chain capability" feature list and verified in Figure 1 and Table 2 of the datasheet.
How does the MC35XS3500PNA implement temperature monitoring?
The MC35XS3500PNA implements temperature monitoring via analog voltage feedback from the GND flag, reported through the CSNS pin when multiplexed (MUX[2:0] = 110). The output is 10.9 mV/°C typical with ±5.0 °C calibrated accuracy at 25 °C. This eliminates the need for external thermistors or digital sensors, enabling real-time thermal derating and over-temperature prewarning (125 °C typical) directly within the MC35XS3500PNA's internal logic.
What is the minimum detectable open-load current for LED operation on the MC35XS3500PNA?
The MC35XS3500PNA detects open-load conditions in LED mode with a threshold of 4.0–20 mA (IOLLED), depending on configuration bits in the SPI register (OLLEDx bits). This low-level detection is enabled when LED Control = 1 and VOL = VBAT − 0.5 V, allowing reliable identification of single-LED failures in multi-LED strings driven by any of OUT1–OUT5. The value is specified in Table 4, Notes 17, 23, 28, 33, and 38.
Can the MC35XS3500PNA drive both incandescent bulbs and LEDs on the same output channel?
Yes, the MC35XS3500PNA supports both incandescent and LED loads on each output channel (OUT1–OUT5) via configurable LED Control bit. When LED Control = 0, RDS(ON) is 35 mΩ (optimized for 2.8 A resistive loads); when LED Control = 1, RDS(ON) increases to 70 mΩ but enables low-duty-cycle PWM operation and tighter current-sense resolution (1.6 A FSR) for LED current regulation. This dual-mode capability is confirmed in the "LEDs control including accurate current sensing and low duty-cycle capability" feature and Table 4 parameter definitions.
MC35XS3500PNA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 24-PowerQFN
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Type:
- General Purpose
- Number of Outputs:
- 6
- Ratio - Input:Output:
- 1:6
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- SPI
- Voltage - Load:
- 7V ~ 20V
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Current - Output (Max):
- -
- Rds On (Typ):
- 35mOhm (Max)
- Input Type:
- -
- Features:
- Watchdog Timer
- Fault Protection:
- Current Limiting (Fixed), Open Load Detect, Over Temperature, Over Voltage
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-PQFN (12x12)
MC35XS3500PNA FAQ
1.How can I place an order for MC35XS3500PNA through Aetrix?
Please submit a Request for Quotation (RFQ) for MC35XS3500PNA 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 MC35XS3500PNA reliable?
The price and inventory of MC35XS3500PNA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC35XS3500PNA is usually 5 days.
3.What payment methods are accepted for MC35XS3500PNA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC35XS3500PNA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC35XS3500PNA?
MC35XS3500PNA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC35XS3500PNA 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 MC35XS3500PNA?
For technical support, including MC35XS3500PNA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC35XS3500PNA requirements.
6.How does Aetrix verify that MC35XS3500PNA is sourced from the original manufacturer or authorized distributors?
All MC35XS3500PNA 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 MC35XS3500PNA meets industry standards.
7.What is the process for return or replacement of MC35XS3500PNA?
All MC35XS3500PNA units undergo pre-shipment inspection (PSI). If there is an issue with MC35XS3500PNA, 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 MC35XS3500PNA part is unused and in its original packaging.
Return procedure for MC35XS3500PNA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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