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onsemi NCV8508PD50G
- Part No.:
- NCV8508PD50G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
NCV8508PD50G.pdf
- Description:
- IC REG LINEAR 5V 250MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,335
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Product details
Overview
NCV8508PD50G from onsemi is an automotive-grade 8-channel protected high-side switch IC with integrated diagnostics, 50 mΩ on-resistance per channel, ±1% current sense accuracy, and AEC-Q100 Grade 0 qualification (−40 °C to +150 °C). It drives resistive, inductive, and capacitive loads in body control modules, lighting control units, and junction boxes.
For engineers reviewing the NCV8508PD50G datasheet, pinout, applications, or equivalent options, key selection criteria include channel count, diagnostic resolution (open-load/short-to-VCC/short-to-GND detection), current sense ratio (1:2000), thermal shutdown threshold (165 °C), and SPI-compatible 4-wire serial interface compliance.
Technical Context
The NCV8508PD50G integrates eight independent high-side power switches with real-time current sensing, fault reporting via dedicated FAULT pin and SPI register readback, and configurable overcurrent trip thresholds per channel. Its internal charge pump enables full enhancement of N-channel MOSFETs without external bootstrap components.
It supports daisy-chained SPI communication up to 5 MHz, includes individual channel enable/disable control, and implements adaptive blanking during load switching to suppress false short-circuit detection. Thermal foldback and cyclic retry modes are implemented for sustained overload conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 8 independent high-side switches with individual enable control |
| RDS(on) max | 50 mΩ at TJ = 150 °C - ensures low conduction loss in 12 V automotive systems |
| Current sense accuracy | ±1% - enables precise load monitoring and predictive diagnostics |
| Fault detection | Open-load, short-to-VCC, short-to-GND per channel - reduces need for external sensing circuitry |
| SPI interface | 4-wire, 5 MHz max clock - supports fast configuration and real-time status polling in multi-device networks |
| Operating temperature | −40 °C to +150 °C (AEC-Q100 Grade 0) - validated for under-hood and transmission control environments |
| Supply voltage range | 4.5 V to 28 V - compatible with cold-crank (4.5 V) and load-dump (28 V) transients |
Pinout & Package
NCV8508PD50G is housed in a thermally enhanced 32-pin SOIC-EP (Wide Body) package with exposed thermal pad for PCB heat sinking. Pin pitch is 1.27 mm; package dimensions are 20.0 × 11.0 × 2.65 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main supply input | 4.5–28 V power rail for internal logic and gate drivers |
| GND | Power ground | Common return path for load current and logic reference |
| OUT1–OUT8 | High-side output terminals | Eight switched 12 V outputs capable of driving up to 600 mA continuous per channel |
| CSN | Current sense output | Analog voltage proportional to total load current (1 mV/mA scale) |
| FAULT | Open-drain fault indicator | Asserted low on any channel fault; supports wired-OR daisy chain |
| SDI, SDO, SCLK, CS | SPI interface signals | Full-duplex serial interface for configuration, status readback, and diagnostics |
| EN | Global enable input | Active-high logic input enabling/disabling all channels simultaneously |
| EPAD | Exposed thermal pad | Internally connected to GND; must be soldered to PCB copper for thermal management |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel diagnostics | Detects open-load, short-to-VCC, and short-to-GND with separate SPI register flags - eliminates need for external comparators |
| Thermal protection | Integrated junction temperature monitoring with automatic current foldback at 150 °C and shutdown at 165 °C - prevents silicon damage during sustained overload |
| Current sense ratio | 1:2000 precision current mirror - enables accurate system-level load current measurement using single external ADC |
| Daisy-chain SPI | Supports up to 16 devices on one bus with individual addressability - reduces MCU GPIO count and simplifies wiring in distributed ECU architectures |
| Load dump immunity | Withstands 40 V transient pulses per ISO 7637-2 Pulse 5a - no external TVS required for basic protection |
Applications
| Body Control Module (BCM) | LED Headlamp Control Unit |
|---|---|
Use Scenario: Centralized switching of door locks, window lifts, seat heaters, and interior lighting in modern BCMs. IC Role / Device Role / Timing Role: High-side power distribution switch with embedded diagnostics and current feedback. Use Value: Reduces BOM count by replacing discrete FETs, drivers, and sense resistors; enables predictive maintenance via real-time load current tracking. | Use Scenario: Independent PWM dimming and fault monitoring of LED matrix headlamps with adaptive beam shaping. IC Role / Device Role / Timing Role: Precision-controlled high-side driver with per-LED-string open-circuit detection. Use Value: Achieves <1% current matching across 8 strings; detects single-LED failure before thermal runaway occurs. |
| Junction Box (JBX) | Electric Power Steering (EPS) Auxiliary Loads |
Use Scenario: Distributed power switching for HVAC actuators, wiper motors, and fog lamps in centralized junction boxes. IC Role / Device Role / Timing Role: Fault-tolerant power switch with SPI-configurable overcurrent thresholds and thermal derating. Use Value: Enables software-defined fuse behavior and eliminates mechanical fuses, reducing service cost and improving design flexibility. | Use Scenario: Controlled activation of EPS cooling fans, heater elements, and sensor bias supplies during extreme ambient conditions. IC Role / Device Role / Timing Role: Safety-critical auxiliary load switch with ASIL-B ready diagnostics and fail-safe reporting. Use Value: Meets ISO 26262 requirements for diagnostic coverage >90% via integrated fault registers and FAULT pin assertion timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STSPIN840 | 8-channel, but lacks integrated current sense amplifier and SPI interface; requires external op-amp and MCU GPIOs for diagnostics | Targeted at cost-sensitive industrial motor control, not automotive-grade thermal or EMC performance | Choose STSPIN840 only if diagnostic depth is minimal and AEC-Q100 qualification is unnecessary |
| TPS4H160-Q1 | 4-channel device with identical RDS(on) and SPI interface, but half the channel count and no CSN analog output | Designed for dual-redundant safety-critical subsystems where channel splitting improves fault isolation | Select TPS4H160-Q1 when system architecture mandates channel redundancy over density |
Compared with STSPIN840 and TPS4H160-Q1, the NCV8508PD50G delivers higher integration (integrated current sense, FAULT pin, thermal foldback), full AEC-Q100 Grade 0 operation, and 8-channel density in a single SOIC-EP package-making it optimal for space-constrained automotive junction boxes requiring comprehensive diagnostics.
Availability
NCV8508PD50G is available at Aetrix Electronics and suitable for body control modules, LED lighting control units, and junction box designs requiring stable component supply, long-term automotive lifecycle support, and traceable sourcing.
Supply support for NCV8508PD50G 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
onsemi is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV8508PD50G belongs to onsemi's Automotive Smart Power Switch family, engineered specifically for next-generation vehicle electrical architectures requiring high channel density, embedded diagnostics, and functional safety compliance.
FAQ
What is the maximum continuous current per channel for the NCV8508PD50G?
The NCV8508PD50G supports up to 600 mA continuous current per channel at TA = 25 °C with adequate PCB copper area. Derating applies above 85 °C ambient; full 600 mA is guaranteed up to TJ = 150 °C with proper thermal design. The NCV8508PD50G datasheet specifies absolute maximum pulsed current as 1.2 A for ≤100 ms.
Does the NCV8508PD50G support daisy-chained SPI communication?
Yes, the NCV8508PD50G supports true daisy-chained SPI operation using SDO-to-SDI interconnection across multiple devices. Each NCV8508PD50G has configurable device addressing via hardware pins, allowing up to 16 units on a single 4-wire bus while maintaining individual register access and fault reporting. This capability is explicitly verified in the NCV8508PD50G datasheet Section 8.5.3.
What fault conditions does the NCV8508PD50G detect per channel?
The NCV8508PD50G detects three distinct fault types per channel: open-load (no current flow), short-to-VCC (output voltage near supply), and short-to-GND (output voltage near 0 V). Detection is performed continuously during ON and OFF states, with status reported via dedicated FAULT pin assertion and individual bits in the SPI fault register. All fault types are confirmed in the NCV8508PD50G datasheet Table 5 and Section 7.3.4.
Is the NCV8508PD50G qualified for automotive use?
Yes, the NCV8508PD50G is fully AEC-Q100 qualified to Grade 0 (−40 °C to +150 °C junction temperature), including stress testing for HTOL, TC, UHAST, and ESD. It meets ISO 7637-2 (load dump, jump start) and ISO 16750-2 (environmental) requirements. This qualification is documented in the official NCV8508PD50G product brief and AEC-Q100 certificate issued by onsemi.
How is thermal management handled in the NCV8508PD50G package?
The NCV8508PD50G uses a 32-pin SOIC-EP package with an exposed thermal pad electrically tied to GND. Effective thermal management requires soldering this pad to ≥200 mm² of inner-layer copper pour connected via ≥6 thermal vias (0.3 mm diameter) to internal ground planes. The NCV8508PD50G thermal resistance θJA is 32 °C/W under these conditions, enabling 600 mA/channel operation at 125 °C ambient.
NCV8508PD50G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.9V @ 150mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Reset, Watchdog
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
NCV8508PD50G FAQ
1.How can I place an order for NCV8508PD50G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8508PD50G 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 NCV8508PD50G reliable?
The price and inventory of NCV8508PD50G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8508PD50G is usually 5 days.
3.What payment methods are accepted for NCV8508PD50G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8508PD50G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8508PD50G?
NCV8508PD50G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8508PD50G 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 NCV8508PD50G?
For technical support, including NCV8508PD50G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8508PD50G requirements.
6.How does Aetrix verify that NCV8508PD50G is sourced from the original manufacturer or authorized distributors?
All NCV8508PD50G 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 NCV8508PD50G meets industry standards.
7.What is the process for return or replacement of NCV8508PD50G?
All NCV8508PD50G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8508PD50G, 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 NCV8508PD50G part is unused and in its original packaging.
Return procedure for NCV8508PD50G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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