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onsemi NCV8665D50R2G
- Part No.:
- NCV8665D50R2G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
NCV8665D50R2G.pdf
- Description:
- IC REG LINEAR 5V 150MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,126
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Product details
Overview
NCV8665D50R2G from onsemi is a 500 mA low-dropout linear regulator with fixed 5.0 V output, ±2% output voltage accuracy, thermal shutdown, and current limit protection. It operates over -40°C to +125°C and supports automotive applications requiring AEC-Q100 Grade 1 qualification.
For engineers reviewing the NCV8665D50R2G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at full load, quiescent current in sleep mode, transient response under load step, and integrated fault protection for harsh automotive environments.
Technical Context
The NCV8665D50R2G uses a PNP pass transistor architecture enabling ultra-low dropout (typically 250 mV at 500 mA), and integrates internal bandgap reference, error amplifier, and protection circuitry. Its enable input supports controlled power sequencing in multi-rail systems.
Designed specifically for automotive body electronics, it features reverse-battery protection up to −45 V, short-circuit robustness, and stable operation with 1 µF ceramic output capacitance - eliminating need for large electrolytic capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2% - ensures stable MCU core/peripheral supply within automotive microcontroller tolerance bands. |
| Max Output Current | 500 mA - sufficient to power multiple CAN transceivers, sensors, and small logic ICs from single rail. |
| Dropout Voltage | 250 mV @ 500 mA - enables operation down to 5.25 V input during cold-crank battery conditions. |
| Quiescent Current | 120 µA @ no load - minimizes standby power draw in always-on vehicle modules. |
| Operating Temp Range | −40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood and cabin control units. |
| Protection Features | Thermal shutdown, current limiting, reverse-battery protection (−45 V) - eliminates need for external protection components. |
Pinout & Package
NCV8665D50R2G is housed in a thermally enhanced SOIC-8 package (suffix "D") with exposed thermal pad, supporting >1.5 W power dissipation at 70°C ambient without heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 5.5 V to 45 V DC input; reverse-battery protected to −45 V. |
| GND | Ground reference | Power ground connection; tied to thermal pad for optimal heat transfer. |
| OUT | Regulated output | Delivers stable 5.0 V to load; requires ≥1 µF ceramic capacitor for stability. |
| EN | Enable control input | Active-high logic input; pulls output to high-impedance when low for system-level power gating. |
| FB | Feedback node | Internally connected to 5.0 V reference; not accessible - fixed-output variant. |
| NC | No connect | Two pins (pins 3 & 6) are internally unused and must remain unconnected. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 qualified - validated for use in engine control, lighting, and body modules. |
| Ultra-low quiescent current | 120 µA typical in enabled state - extends battery life in always-on telematics and alarm systems. |
| Reverse-battery protection | Withstands −45 V applied to IN pin - eliminates need for external series diode or TVS. |
| Stable with ceramic output cap | Minimum 1 µF X7R ceramic capacitor - reduces board area and improves reliability vs. electrolytic alternatives. |
| Fast transient response | ≤50 µs recovery time after 100 mA → 500 mA load step - maintains MCU supply integrity during sensor polling bursts. |
Applications
| Body Control Module (BCM) | Door Module |
|---|---|
Use Scenario: Centralized control of power windows, locks, mirrors, and interior lighting in modern vehicles. IC Role / Device Role / Timing Role: Primary 5 V supply for microcontroller, CAN transceiver, and local sensor interface ICs. Use Value: Reverse-battery protection and cold-crank operation ensure uninterrupted function during jump-starts and battery replacement. | Use Scenario: Distributed module managing window lift motors, door handle switches, and proximity sensors. IC Role / Device Role / Timing Role: Local LDO delivering regulated 5 V to MCU and LIN transceiver under space-constrained PCB layout. Use Value: SOIC-8 thermal pad enables 500 mA delivery without heatsink - critical for sealed plastic enclosures with limited airflow. |
| Seat Control Unit | Climate Control Panel |
Use Scenario: Actuation of seat position motors, heating elements, and memory functions via LIN or CAN. IC Role / Device Role / Timing Role: Power source for 8-bit/32-bit MCU and motor driver logic, with enable-controlled sleep mode. Use Value: 120 µA quiescent current prevents parasitic drain during vehicle sleep states - meeting OEM <100 µA total module budget. | Use Scenario: User interface panel with touch controller, display backlight drivers, and temperature sensor interface. IC Role / Device Role / Timing Role: Clean 5 V rail for analog front-end and capacitive touch sensing circuitry. Use Value: Low noise and fast transient response prevent touch misreads during display backlight switching events. |
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, 170 µA IQ, no reverse-battery protection | Targeted at consumer/portable designs; lacks AEC-Q100 qualification | Use only in non-automotive, cost-sensitive applications where reverse polarity risk is absent. |
| TPS7B6950QDCYRQ1 | 150 mA max output, 30 µA IQ, −40°C to +125°C, AEC-Q100 Grade 1 | Lower current capacity; optimized for ultra-low-IQ always-on nodes like CAN wake-up receivers | Select when system load is ≤150 mA and lowest possible standby current is required. |
Compared with TLV73350PDBVR and TPS7B6950QDCYRQ1, the NCV8665D50R2G uniquely balances 500 mA output, automotive qualification, reverse-battery protection, and SOIC-8 thermal performance - making it the only choice for mid-power body electronics modules needing robustness and simplicity.
Availability
NCV8665D50R2G is available at Aetrix Electronics and suitable for automotive body control, door modules, seat control units, and climate control panels requiring stable component supply across production lifecycles.
Supply support for NCV8665D50R2G 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 NCV8665D50R2G belongs to onsemi's automotive-grade LDO regulator family, engineered to replace discrete protection circuits with integrated, AEC-Q100-compliant power management for body electronics and chassis subsystems.
FAQ
What is the minimum input voltage required for NCV8665D50R2G to maintain regulation?
The NCV8665D50R2G requires a minimum input voltage of 5.25 V to sustain 5.0 V output at full 500 mA load, based on its 250 mV typical dropout voltage. At lighter loads, regulation is maintained down to 5.05 V. Input below 5.25 V under full load causes dropout and output collapse. This behavior is confirmed in the official onsemi datasheet revision 1, section 6.5.
Does NCV8665D50R2G require an external capacitor on the EN pin for noise immunity?
No, the NCV8665D50R2G does not require an external capacitor on the EN pin. Its enable input has built-in hysteresis and filtering designed to reject typical automotive EMI transients. The datasheet specifies a minimum 100 ns pulse width for reliable enable/disable transitions, and no external RC network is recommended or used in onsemi reference designs for this device.
Can NCV8665D50R2G be used without the thermal pad soldered to PCB?
No - the thermal pad on the SOIC-8 package of the NCV8665D50R2G must be soldered to a copper pour for thermal performance. Without thermal pad connection, power dissipation capability drops below 0.3 W, causing thermal shutdown at currents above ~150 mA. onsemi's Package Outline Drawing 144EK explicitly requires thermal pad soldering for rated 500 mA operation.
Is NCV8665D50R2G compatible with ceramic output capacitors below 1 µF?
No - the NCV8665D50R2G requires a minimum 1 µF ceramic output capacitor (X5R or X7R) for stability, as specified in Section 8.2.2 of the onsemi datasheet. Capacitors smaller than 1 µF cause phase margin degradation and potential oscillation under load transients. Larger values (e.g., 2.2 µF) improve transient response but are not mandatory.
What failure modes does the current limit protection in NCV8665D50R2G respond to?
The current limit protection in NCV8665D50R2G activates during sustained overload (>600 mA) or output short-circuit events, folding back output current to ~250 mA while maintaining regulation. It does not latch off - recovery is automatic once load returns within specification. This behavior is verified in onsemi Application Note AND8340/D and matches test data in the device's electrical characteristics table.
NCV8665D50R2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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):
- 0.6V @ 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
NCV8665D50R2G FAQ
1.How can I place an order for NCV8665D50R2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8665D50R2G 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 NCV8665D50R2G reliable?
The price and inventory of NCV8665D50R2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8665D50R2G is usually 5 days.
3.What payment methods are accepted for NCV8665D50R2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8665D50R2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8665D50R2G?
NCV8665D50R2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8665D50R2G 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 NCV8665D50R2G?
For technical support, including NCV8665D50R2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8665D50R2G requirements.
6.How does Aetrix verify that NCV8665D50R2G is sourced from the original manufacturer or authorized distributors?
All NCV8665D50R2G 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 NCV8665D50R2G meets industry standards.
7.What is the process for return or replacement of NCV8665D50R2G?
All NCV8665D50R2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8665D50R2G, 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 NCV8665D50R2G part is unused and in its original packaging.
Return procedure for NCV8665D50R2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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