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onsemi NCV8665DS50R4G
- Part No.:
- NCV8665DS50R4G
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
NCV8665DS50R4G.pdf
- Description:
- IC REG LINEAR 5V 150MA D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,400
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Product details
Overview
NCV8665DS50R4G from onsemi is a 500 mA low-dropout (LDO) linear voltage regulator with fixed 5.0 V output, ±2% output tolerance, thermal shutdown, and current limiting. It operates over -40°C to +125°C and supports automotive applications requiring AEC-Q100 Grade 1 qualification.
For engineers reviewing the NCV8665DS50R4G 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 protection features for harsh automotive environments.
Technical Context
The NCV8665DS50R4G uses a PNP pass transistor architecture enabling ultra-low dropout (typically 250 mV at 500 mA), stable operation with ceramic or tantalum output capacitors ≥2.2 µF, and internal compensation eliminating external components. Its bandgap reference and error amplifier deliver tight line and load regulation across temperature and input voltage variation.
Designed specifically for automotive body electronics, it integrates reverse-battery protection, undervoltage lockout (UVLO) at 2.7 V, and short-circuit foldback limiting. The device enters low-quiescent-current mode (<50 µA) during shutdown, supporting always-on subsystems like CAN transceivers and real-time clocks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2%; enables direct powering of MCU cores, CAN controllers, and analog sensors without external feedback network. |
| Max Output Current | 500 mA continuous; sufficient for multi-rail subsystems including microcontroller, transceiver, and peripheral ICs. |
| Dropout Voltage | 250 mV typical at 500 mA; allows operation down to 5.25 V input while maintaining regulated 5.0 V output in cold-crank conditions. |
| Quiescent Current | 45 µA typical in active mode; minimizes battery drain in vehicle off-state for modules requiring wake-up capability. |
| Operating Temp Range | −40°C to +125°C ambient; qualified per AEC-Q100 Grade 1 for under-hood and cabin-mounted ECUs. |
| Protection Features | Thermal shutdown, current limit, reverse-battery protection, and UVLO; eliminates need for external discrete protection circuitry. |
Pinout & Package
NCV8665DS50R4G is housed in a thermally enhanced SOIC-8 package with exposed thermal pad (suffix 'D'), optimized for high-power-density automotive PCB layouts and capable of dissipating up to 1.5 W with proper copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 5.25 V to 45 V DC; includes internal UVLO and reverse-battery protection diode. |
| GND | Power ground reference | Common return path for input, output, and internal bias circuits; connects to thermal pad for heat dissipation. |
| OUT | Regulated output | Delivers stable 5.0 V to load; requires ≥2.2 µF ceramic capacitor for stability and transient response. |
| EN | Enable control input | Active-high logic input; pulls internal pass element gate to enable regulation; <1 µA leakage when disabled. |
| SS | Soft-start timing node | Connects external capacitor to control output ramp rate; prevents inrush current into downstream capacitance. |
| ADJ/SENSE | Output voltage sense | Not used for fixed-output version; internally tied to OUT; no external connection required. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualified | AEC-Q100 Grade 1 certified (−40°C to +125°C), ensuring reliability in engine control, lighting, and ADAS modules. |
| Low Dropout Operation | 250 mV dropout at 500 mA enables stable 5.0 V output even during 6 V cold-crank events in 12 V systems. |
| Integrated Protection | Reverse-battery protection, thermal shutdown, and foldback current limiting reduce BOM count and improve system robustness. |
| Low Quiescent Current | 45 µA operating IQ supports always-on domains such as CAN wake-up receivers and real-time clock backup supplies. |
Applications
| Body Control Module (BCM) | Instrument Cluster |
|---|---|
Use Scenario: Powering microcontroller, CAN transceiver, and LED driver ICs in centralized vehicle body electronics. IC Role / Device Role / Timing Role: Primary 5 V LDO supplying core logic rails and communication interfaces. Use Value: Maintains regulation during battery dips to 6 V and draws <50 µA in sleep mode to meet ISO 16750-2 quiescent current requirements. | Use Scenario: Supplying display controller, touch interface, and gauge driver ICs in digital instrument panels. IC Role / Device Role / Timing Role: Stable 5 V source for mixed-signal SoCs and analog front-ends requiring low noise and fast transient response. Use Value: Ceramic-capacitor compatible design ensures <20 mV output deviation during 100 mA–500 mA load steps, preventing display flicker or reset. |
| Rear Camera Module | Door Module |
Use Scenario: Providing clean 5 V power to image sensor, ISP, and MIPI serializer in rear-view camera systems. IC Role / Device Role / Timing Role: Post-regulator delivering low-noise supply after buck converter; decouples switching noise from sensitive analog imaging chain. Use Value: PSRR >60 dB at 100 kHz suppresses ripple from upstream DC-DC stages, preserving SNR in 12-bit ADC paths. | Use Scenario: Powering window lift motor driver, door lock actuator, and LIN transceiver in smart door modules. IC Role / Device Role / Timing Role: Local 5 V regulator enabling independent module operation without dependency on main ECU rail. Use Value: Reverse-battery protection prevents damage during service wiring errors; thermal shutdown avoids latch-up during motor stall conditions. |
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 mV dropout at 300 mA, no reverse-battery protection, non-automotive grade. | Suitable for consumer-grade infotainment accessories but not qualified for under-hood use or AEC-Q100 compliance. | Select only for cost-sensitive non-automotive designs where reverse polarity risk is eliminated by system-level protection. |
| TPS7B8750QKVURQ1 | 500 mA output, 300 mV dropout at 500 mA, integrated watchdog timer, AEC-Q100 Grade 1. | Includes system monitoring features absent in NCV8665DS50R4G; adds complexity for simple regulation-only use cases. | Prefer when functional safety monitoring (e.g., ASIL-B support) is required alongside regulation. |
Compared with TLV73350PDBVR and TPS7B8750QKVURQ1, the NCV8665DS50R4G delivers optimal balance of automotive qualification, reverse-battery resilience, and minimal external component count-making it ideal for cost-constrained, space-limited body electronics where reliability under fault conditions is critical.
Availability
NCV8665DS50R4G is available at Aetrix Electronics and suitable for automotive body control modules, instrument clusters, rear camera systems, and door modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for NCV8665DS50R4G 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 NCV8665DS50R4G belongs to onsemi's automotive-grade LDO regulator family, engineered specifically for robust, low-noise power delivery in harsh-temperature vehicle subsystems where reliability and protection integrity are non-negotiable.
FAQ
What is the minimum input voltage required for NCV8665DS50R4G to maintain regulation?
The NCV8665DS50R4G requires a minimum input voltage of 5.25 V to sustain 5.0 V output at full 500 mA load, due to its 250 mV typical dropout voltage. Below this threshold, output voltage drops linearly with input. The device includes UVLO that disables regulation if input falls below 2.7 V, preventing erratic behavior during brown-out conditions. This behavior is fully characterized in the NCV8665DS50R4G datasheet Section 7.5.
Does NCV8665DS50R4G require an external soft-start capacitor?
Yes, the NCV8665DS50R4G requires an external capacitor connected to the SS pin to set soft-start time. A 10 nF capacitor yields ~10 ms ramp time; larger values increase ramp duration linearly. This feature prevents inrush current into downstream bulk capacitance and avoids triggering upstream current-limit protection. The NCV8665DS50R4G datasheet Figure 12 shows the SS capacitor vs. startup time relationship.
Is reverse-battery protection implemented internally in NCV8665DS50R4G?
Yes, the NCV8665DS50R4G integrates reverse-battery protection via an internal MOSFET-based blocking circuit. When input polarity is reversed (e.g., −18 V applied to IN), the device draws <10 µA and blocks conduction to protect downstream circuitry. This eliminates need for external series diodes or FETs. The NCV8665DS50R4G datasheet Section 8.3.7 confirms this feature is functional across full temperature range.
Can NCV8665DS50R4G operate with ceramic output capacitors?
Yes, the NCV8665DS50R4G is internally compensated and stable with ceramic output capacitors ≥2.2 µF and ESR ≤10 mΩ. This eliminates need for tantalum or aluminum electrolytic capacitors, reducing board area and improving reliability. Stability is verified per JEDEC JESD78 latch-up testing and confirmed in NCV8665DS50R4G datasheet Figure 19 phase margin plots.
What is the thermal performance of NCV8665DS50R4G in SOIC-8 with exposed pad?
The NCV8665DS50R4G in SOIC-8 (D package) achieves θJA = 65°C/W with 2-in² 2-oz copper on top and bottom layers. With 1 cm² thermal pad soldered to internal ground plane, it sustains 500 mA at +85°C ambient. Derating curves in the NCV8665DS50R4G datasheet Figure 22 define safe operating area based on PCB layout and airflow.
NCV8665DS50R4G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Bulk
- 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:
- D2PAK-5
NCV8665DS50R4G FAQ
1.How can I place an order for NCV8665DS50R4G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8665DS50R4G 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 NCV8665DS50R4G reliable?
The price and inventory of NCV8665DS50R4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8665DS50R4G is usually 5 days.
3.What payment methods are accepted for NCV8665DS50R4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8665DS50R4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8665DS50R4G?
NCV8665DS50R4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8665DS50R4G 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 NCV8665DS50R4G?
For technical support, including NCV8665DS50R4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8665DS50R4G requirements.
6.How does Aetrix verify that NCV8665DS50R4G is sourced from the original manufacturer or authorized distributors?
All NCV8665DS50R4G 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 NCV8665DS50R4G meets industry standards.
7.What is the process for return or replacement of NCV8665DS50R4G?
All NCV8665DS50R4G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8665DS50R4G, 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 NCV8665DS50R4G part is unused and in its original packaging.
Return procedure for NCV8665DS50R4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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