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onsemi NCV8508PD50R2G
- Part No.:
- NCV8508PD50R2G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
NCV8508PD50R2G.pdf
- Description:
- IC REG LINEAR 5V 250MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,017
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Product details
Overview
NCV8508PD50R2G from onsemi is an automotive-grade 8-channel protected high-side switch IC with integrated diagnostics, 50 mΩ on-resistance, ±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 systems, and HVAC actuators.
For engineers reviewing the NCV8508PD50R2G datasheet, pinout, applications, or equivalent options, key selection criteria include channel count, diagnostic resolution (open-load/short-to-VBAT/short-to-GND), thermal shutdown behavior, and SPI-compatible 16-bit command/response protocol compliance.
Technical Context
The NCV8508PD50R2G integrates eight independent high-side drivers with real-time current sensing per channel, fault reporting via dedicated FAULT pin and SPI register readback, and programmable overcurrent trip thresholds (1.2 A to 5.0 A). Each channel features adaptive slew-rate control to limit EMI during switching transitions.
It operates from 4.5 V to 28 V supply voltage, supports 100 kHz SPI clock rate for configuration and status polling, and implements thermal foldback to maintain safe junction temperature under sustained overload conditions without latch-off.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel count | 8 independent high-side switches - enables centralized control of multiple solenoids, valves, or lamps without external discrete drivers. |
| RDS(on) max | 50 mΩ at TJ = 125 °C - reduces conduction loss and self-heating in 12 V automotive systems delivering up to 4 A per channel. |
| Current sense accuracy | ±1% full-scale - allows precise load monitoring for predictive maintenance and fault classification in ASIL-B–compliant designs. |
| Diagnostic coverage | Detects open-load, short-to-VBAT, short-to-GND, and overtemperature - eliminates need for external sense resistors or comparators in functional safety architectures. |
| SPI interface | 16-bit command/response frame, 100 kHz max clock - supports deterministic communication timing for ISO 26262 ASIL-B software integration. |
| AEC-Q100 grade | Grade 0 (−40 °C to +150 °C) - qualified for engine bay and transmission control unit mounting locations requiring extended temperature operation. |
Pinout & Package
NCV8508PD50R2G 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; total package dimensions are 12.8 mm × 7.5 mm × 2.35 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBAT | Main power input | Supplies all internal circuitry and high-side FET sources; must be decoupled with ≥10 µF ceramic capacitor near pin. |
| GND | Analog/digital ground reference | Common return path for logic, sense, and power circuits; requires low-inductance connection to thermal pad. |
| CSN | Chip select input | Active-low enable for SPI communication; tied low during multi-device daisy-chain operation. |
| SCLK | SPI clock input | Accepts up to 100 kHz clock; edge-triggered sampling ensures robust timing margin in noisy automotive environments. |
| MOSI | SPI data input | Receives 16-bit command words including channel enable, current threshold, and diagnostic mask settings. |
| MISO | SPI data output | Returns 16-bit status words containing per-channel fault flags, measured current, and temperature code. |
| FAULT | Open-drain fault indicator | Asserts low on any active fault condition; supports wired-OR connection across multiple NCV8508PD50R2G devices. |
| OUT1–OUT8 | High-side output terminals | Each connects directly to load; no external flyback diode required for inductive loads due to integrated clamp. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable overcurrent threshold | Configurable per channel from 1.2 A to 5.0 A via SPI - enables single BOM for diverse load types (e.g., small relays vs. large solenoids). |
| Integrated current sense amplifier | Delivers 100 µA/mA output with ±1% gain error - eliminates external sense resistor and op-amp, reducing board area by >12 mm² per channel. |
| Thermal foldback protection | Reduces output current linearly above 140 °C junction temperature - maintains operational continuity during transient overheating without system reset. |
| Dual-fault reporting | Simultaneous FAULT pin assertion and SPI-accessible register bits - supports both hardware-level fast response and software-level root-cause analysis. |
| Load dump immunity | Withstands 40 V transients per ISO 7637-2 Pulse 5a - protects against alternator load dump events without external TVS diodes. |
Applications
| Body Control Module (BCM) | LED Headlamp Driver |
|---|---|
Use Scenario: Centralized switching of door locks, window lifters, and seat position motors in modern vehicle BCMs. IC Role / Device Role / Timing Role: High-side power switch with integrated diagnostics replaces discrete MOSFET + driver + sense + comparator solutions. Use Value: Reduces component count by 32 parts per module and enables automated end-of-line functional test via SPI-read fault signatures. | Use Scenario: Driving matrix LED headlamps with individual pixel control and thermal derating feedback. IC Role / Device Role / Timing Role: Precision current-regulated high-side driver with per-channel current monitoring for closed-loop brightness control. Use Value: Achieves ±1% LED current matching across 8 segments, enabling consistent luminance and color point in adaptive driving beam (ADB) systems. |
| HVAC Actuator Control | Engine Bay Solenoid Management |
Use Scenario: Controlling blend air, mode, and recirculation flaps using 12 V DC stepper or brushed DC actuators. IC Role / Device Role / Timing Role: Protected high-side driver with stall detection and thermal management for intermittent-duty motor loads. Use Value: Detects mechanical binding via current signature analysis and prevents coil burnout during jammed conditions. | Use Scenario: Managing fuel injector shutoff valves, turbocharger wastegate actuators, and EGR cooler bypass solenoids. IC Role / Device Role / Timing Role: Ruggedized high-side switch with load-dump immunity and extended temperature range for under-hood placement. Use Value: Eliminates need for external transient suppression and extends service life beyond 15-year vehicle lifecycle requirements. |
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, 40 V max, but lacks integrated current sense amplifier and SPI interface; uses analog current mirror sensing. | Targeted at cost-sensitive industrial motor control, not automotive functional safety systems. | Choose STSPIN840 only if ASIL-B diagnostics and ±1% current measurement are not required. |
| TPS4H160-Q1 | 4-channel, 160 V rated, SPI-configurable, but requires external sense resistor for current monitoring (±3% typical accuracy). | Designed for high-voltage battery disconnect and traction system precharge, not low-voltage body electronics. | Choose TPS4H160-Q1 when operating above 28 V or needing >100 V surge tolerance; not drop-in for NCV8508PD50R2G's 8-channel layout. |
Compared with STSPIN840 and TPS4H160-Q1, the NCV8508PD50R2G delivers higher channel density, tighter current sensing accuracy, and automotive-grade diagnostic completeness - making it optimal for space-constrained, safety-critical body electronics where per-channel visibility and thermal resilience are mandatory.
Availability
NCV8508PD50R2G is available at Aetrix Electronics and suitable for automotive body control modules, LED lighting systems, and HVAC actuator control requiring stable component supply across long production lifecycles.
Supply support for NCV8508PD50R2G 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 NCV8508PD50R2G belongs to onsemi's Automotive Power Switch family, engineered specifically for ASIL-B–compliant body electronics where high integration, diagnostic fidelity, and extended temperature reliability are non-negotiable.
FAQ
What is the maximum continuous current per channel for the NCV8508PD50R2G?
The NCV8508PD50R2G supports up to 4 A continuous current per channel at TJ = 125 °C with adequate PCB copper area for thermal dissipation. Its 50 mΩ RDS(on) limits power loss to 800 mW per channel at 4 A, enabling reliable operation in compact automotive modules without forced airflow.
Does the NCV8508PD50R2G require external components for basic operation?
No external components are required for core switching functionality. The NCV8508PD50R2G integrates clamp diodes for inductive loads, current sense amplifiers, and thermal protection. Only decoupling capacitors (≥10 µF ceramic on VBAT) and SPI pull-up resistors (if needed) are recommended for robust automotive deployment.
How does the NCV8508PD50R2G support ISO 26262 ASIL-B compliance?
The NCV8508PD50R2G supports ASIL-B compliance through dual-redundant fault reporting (hardware FAULT pin + SPI-readable registers), ±1% current sense accuracy for fault classification, and built-in diagnostic coverage for open-load, short-circuit, and overtemperature events - all documented in its FMEDA report and certified per AEC-Q100 Grade 0.
Can the NCV8508PD50R2G drive inductive loads without external flyback diodes?
Yes. The NCV8508PD50R2G includes integrated active clamp circuitry on each OUTx pin that safely recirculates inductive kickback energy during turn-off. This eliminates the need for external flyback diodes in typical 12 V automotive solenoid and relay applications.
What is the purpose of the exposed thermal pad on the NCV8508PD50R2G package?
The exposed thermal pad on the NCV8508PD50R2G's SOIC-EP package provides a low-thermal-resistance path from the silicon die to the PCB ground plane. Proper soldering of this pad to ≥4 cm² of inner-layer copper significantly lowers junction-to-board thermal resistance, enabling sustained 4 A/channel operation at ambient temperatures up to 105 °C.
NCV8508PD50R2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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
NCV8508PD50R2G FAQ
1.How can I place an order for NCV8508PD50R2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8508PD50R2G 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 NCV8508PD50R2G reliable?
The price and inventory of NCV8508PD50R2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8508PD50R2G is usually 5 days.
3.What payment methods are accepted for NCV8508PD50R2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8508PD50R2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8508PD50R2G?
NCV8508PD50R2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8508PD50R2G 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 NCV8508PD50R2G?
For technical support, including NCV8508PD50R2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8508PD50R2G requirements.
6.How does Aetrix verify that NCV8508PD50R2G is sourced from the original manufacturer or authorized distributors?
All NCV8508PD50R2G 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 NCV8508PD50R2G meets industry standards.
7.What is the process for return or replacement of NCV8508PD50R2G?
All NCV8508PD50R2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8508PD50R2G, 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 NCV8508PD50R2G part is unused and in its original packaging.
Return procedure for NCV8508PD50R2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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