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onsemi NCV8665D50G
- Part No.:
- NCV8665D50G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
NCV8665D50G.pdf
- Description:
- IC REG LINEAR 5V 150MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,669
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Product details
Overview
NCV8665D50G from onsemi is an automotive-grade 500 mA low-dropout linear regulator with fixed 5.0 V output, ±2% output voltage accuracy, thermal shutdown, and reverse-battery protection. It operates over -40°C to +150°C ambient temperature and supports input voltages from 5.5 V to 45 V, making it suitable for engine control units and body control modules.
For engineers reviewing the NCV8665D50G datasheet, pinout, applications, or equivalent options, key selection criteria include automotive AEC-Q100 Grade 1 qualification, integrated reverse-polarity protection, ultra-low quiescent current (22 µA typical), and robust load transient response under 100 mA step changes.
Technical Context
The NCV8665D50G integrates a PNP pass transistor with internal current limiting and thermal foldback, enabling stable regulation without external compensation. Its wide input range (5.5 V–45 V) and 500 mA continuous output support direct battery connection in 12 V and 24 V automotive systems.
Designed for harsh environments, the device features built-in reverse-battery protection (−42 V tolerance), short-circuit protection with auto-recovery, and guaranteed operation up to +150°C junction temperature-critical for under-hood applications where thermal margin is constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2% - ensures compatibility with 5 V microcontrollers and CAN transceivers without external feedback. |
| Max Output Current | 500 mA - sufficient to power multiple low-power ICs (e.g., MCU, sensor interface, CAN PHY) from a single rail. |
| Input Voltage Range | 5.5 V to 45 V - supports cold-crank (5.5 V) and load-dump (40 V transient) conditions per ISO 7637-2. |
| Quiescent Current | 22 µA typical - enables always-on functionality in vehicle security modules and telematics without excessive battery drain. |
| Operating Temperature | −40°C to +150°C (junction) - qualified for AEC-Q100 Grade 1, enabling placement near engines or in transmission control units. |
| Droput Voltage | 0.45 V at 500 mA - maintains regulation down to 5.45 V input, critical during cranking when battery dips below 6 V. |
| Protection Features | Reverse-battery (−42 V), thermal shutdown, short-circuit - eliminates need for external diodes or fuses in cost-sensitive designs. |
Pinout & Package
NCV8665D50G is housed in a thermally enhanced DPAK (TO-252-3) package with exposed thermal pad for improved heat dissipation in high-ambient environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply connection | Accepts unregulated battery input (5.5–45 V); must be decoupled with ≥10 µF ceramic capacitor near pin. |
| GND | Ground reference | Common return path for load current and internal circuitry; connects to thermal pad for optimal thermal performance. |
| OUT | Regulated output | Delivers stable 5.0 V ±2% to downstream logic; requires ≥2.2 µF ceramic output capacitor for stability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Guarantees operation from −40°C to +125°C ambient (150°C junction), meeting automotive reliability requirements without derating. |
| Integrated reverse-battery protection | Withstands −42 V input without external components-reduces BOM count and PCB area in battery-connected circuits. |
| Ultra-low quiescent current | 22 µA typical enables >1-year battery life in always-on modules such as door modules and remote keyless entry receivers. |
| Thermal shutdown with hysteresis | Shuts down at 170°C junction and restarts at 150°C, preventing latch-up during sustained overload or poor heatsinking. |
| Load transient response | ≤100 mV deviation for 100 mA step load change - maintains MCU core voltage stability during wake-up events. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers 5 V microcontroller, CAN transceiver, and analog sensors in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Primary 5 V LDO supplying core logic and communication interfaces. Use Value: Maintains regulation during cold-crank (5.5 V input) and load-dump (40 V transients), ensuring uninterrupted ECU operation. | Use Scenario: Supplies 5 V rail to door module MCU, window motor drivers, and LIN transceivers. IC Role / Device Role / Timing Role: Always-on LDO supporting wake-on-LIN functionality and low-power sleep modes. Use Value: 22 µA quiescent current prevents excessive battery drain during vehicle standby (>1 year shelf life). |
| Transmission Control Unit (TCU) | Advanced Driver Assistance Systems (ADAS) Camera Module |
Use Scenario: Provides clean 5 V supply to TCU MCU and solenoid driver ICs in automatic transmissions. IC Role / Device Role / Timing Role: High-temperature-stable LDO operating near gearbox housing. Use Value: Guaranteed operation up to +150°C junction temperature enables direct mounting on TCU PCB without heatsink. | Use Scenario: Powers image signal processor (ISP) and CMOS image sensor in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Noise-sensitive 5 V supply with low dropout for stable sensor timing. Use Value: 0.45 V dropout at 500 mA ensures regulation even during battery sag in parking mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73350PDBVR | 300 mA max output, 500 mV dropout at 300 mA, no reverse-battery protection, not AEC-Q100 qualified. | Suitable only for non-automotive industrial or consumer applications with lower current and benign environment. | Select only if automotive qualification, reverse-battery tolerance, or >300 mA load is not required. |
| TPS7B6950QDCYRQ1 | 250 mA max output, 300 mV dropout at 250 mA, AEC-Q100 Grade 1, reverse-battery protected to −40 V. | Limited to lower-current subsystems (e.g., sensor nodes, small MCUs); insufficient for multi-load 500 mA applications. | Choose when footprint and thermal constraints favor SOT-223, and full 500 mA is unnecessary. |
Compared with TLV73350PDBVR and TPS7B6950QDCYRQ1, the NCV8665D50G uniquely delivers 500 mA output with −42 V reverse-battery tolerance and AEC-Q100 Grade 1 rating in DPAK-making it the only option for high-current, under-hood automotive LDO applications requiring robustness and thermal headroom.
Availability
NCV8665D50G is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control units requiring stable component supply across automotive production lifecycles.
Supply support for NCV8665D50G 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 NCV8665D50G belongs to onsemi's Automotive Power Management portfolio, designed specifically for demanding under-hood and chassis-mounted electronics requiring high reliability, extended temperature operation, and integrated protection.
FAQ
What is the maximum input voltage rating for the NCV8665D50G?
The NCV8665D50G supports a maximum continuous input voltage of 45 V and withstands reverse-battery conditions down to −42 V. This rating complies with ISO 7637-2 pulse 5a (load dump) and enables direct connection to 12 V and 24 V vehicle batteries without external clamping circuitry. The NCV8665D50G maintains safe operation across all specified transients when used with appropriate input capacitance.
Does the NCV8665D50G require external capacitors for stability?
Yes, the NCV8665D50G requires a minimum 10 µF ceramic capacitor on the IN pin and a minimum 2.2 µF ceramic capacitor on the OUT pin for stable operation. These values are specified in the official onsemi datasheet and ensure adequate phase margin under all load and temperature conditions. Omitting or undersizing these capacitors may cause oscillation or poor transient response in the NCV8665D50G.
Is the NCV8665D50G pin-compatible with other onsemi LDOs in DPAK package?
No, the NCV8665D50G has a unique 3-pin DPAK (TO-252-3) pinout (IN-GND-OUT) and is not pin-compatible with other onsemi DPAK LDOs such as NCV8674 or NCV8664, which use different pin assignments and internal architectures. Layout reuse requires verification against each device's specific pinout diagram and thermal pad connection requirements for the NCV8665D50G.
What is the typical quiescent current of the NCV8665D50G in shutdown mode?
The NCV8665D50G does not feature an enable/shutdown pin and therefore has no defined shutdown mode. Its quiescent current remains at 22 µA typical in normal operation-even when no load is connected-making it suitable for always-on automotive functions. This value is measured at 25°C with 13.5 V input and zero load, and is fully characterized across temperature in the NCV8665D50G datasheet.
How does the thermal protection of the NCV8665D50G behave during overload?
The NCV8665D50G employs thermal shutdown with hysteresis: it disables the pass transistor at approximately 170°C junction temperature and automatically resumes regulation once the die cools to ~150°C. This cycle prevents permanent damage during sustained overload or inadequate heatsinking. The behavior is fully tested and guaranteed across process corners for the NCV8665D50G, with no manual reset required.
NCV8665D50G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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):
- 0.6V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 34 µA
- Current - Supply (Max):
- 40 µA
- PSRR:
- 69dB (100Hz)
- Control Features:
- Reset
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
NCV8665D50G FAQ
1.How can I place an order for NCV8665D50G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8665D50G 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 NCV8665D50G reliable?
The price and inventory of NCV8665D50G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8665D50G is usually 5 days.
3.What payment methods are accepted for NCV8665D50G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8665D50G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8665D50G?
NCV8665D50G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8665D50G 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 NCV8665D50G?
For technical support, including NCV8665D50G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8665D50G requirements.
6.How does Aetrix verify that NCV8665D50G is sourced from the original manufacturer or authorized distributors?
All NCV8665D50G 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 NCV8665D50G meets industry standards.
7.What is the process for return or replacement of NCV8665D50G?
All NCV8665D50G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8665D50G, 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 NCV8665D50G part is unused and in its original packaging.
Return procedure for NCV8665D50G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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