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onsemi NCV663SQ18T1
- Part No.:
- NCV663SQ18T1
- Manufacturer:
- onsemi
- Package:
- SC-82A, SOT-343
- Datasheet:
-
NCV663SQ18T1.pdf
- Description:
- IC REG LINEAR FIXED LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:12,000
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Product details
Overview
NCV663SQ18T1 from onsemi is an automotive-grade 100 mA CMOS low-dropout linear regulator with fixed 1.8 V output, ultra-low 2.5 µA typical quiescent current, ±2.0% output voltage accuracy, and operation over −40°C to +125°C ambient temperature - designed for power-sensitive infotainment and body control modules in battery-powered automotive systems.
For engineers reviewing the NCV663SQ18T1 datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, validated pin functions, real-world application constraints, and confirmed alternative options for automotive LDO selection.
Technical Context
The NCV663SQ18T1 uses a PMOS pass transistor architecture enabling low dropout (230 mV typical at 100 mA), stable operation with ≥0.1 µF ceramic output capacitors, and no ESR requirements. It integrates thermal shutdown and current limit protection without external components.
Unlike the NCV662 variant, the NCV663SQ18T1 omits an enable pin and replaces it with a no-connect (N/C) terminal at Pin 4, simplifying control logic in always-on subsystems while maintaining identical regulation performance and automotive temperature rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2.0% - ensures stable core voltage for 1.8 V microcontrollers and sensors under load and temperature variation. |
| Quiescent Current | 2.5 µA typical - enables multi-year battery life in always-on automotive modules such as door controllers or telematics standby circuits. |
| Dropout Voltage | 230 mV max at 100 mA - supports regulation down to Vin = 2.03 V, critical for cold-crank operation where battery dips to 2.5 V. |
| Operating Temperature | −40°C to +125°C ambient - qualified for under-hood and infotainment applications per AEC-Q100 stress requirements. |
| Input Voltage Range | Up to 6.0 V - compatible with 5 V rail systems and transient-suppressed 12 V battery inputs via pre-regulation. |
| Output Current | 100 mA continuous - sufficient for powering MCU cores, CAN transceivers, or small display drivers without thermal derating at TA ≤ 85°C. |
| Package | SC82-AB (SC70-4) - 2.2 mm × 1.35 mm × 0.95 mm surface-mount footprint with exposed pad for thermal relief in compact PCB layouts. |
Pinout & Package
NCV663SQ18T1 is housed in the SC82-AB (Case 419C) 4-pin surface-mount package: 1.8 mm × 1.35 mm body, 0.95 mm height, 0.65 mm pitch, with GND on Pin 1, Vin on Pin 2, Vout on Pin 3, and N/C on Pin 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power supply ground reference - must be connected to low-impedance system ground plane to ensure regulation stability and noise immunity. |
| 2 | Vin | Input voltage supply - accepts 1.83 V to 6.0 V; requires local 1.0 µF ceramic decoupling capacitor placed within 2 mm of the pin. |
| 3 | Vout | Regulated 1.8 V output - drives load directly; minimum 0.1 µF ceramic output capacitor required for stability across temperature and load steps. |
| 4 | N/C | No internal connection - left unconnected; not tied to any internal node and must not be soldered to PCB traces or planes. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 2.5 µA typical quiescent current enables <1 µA system standby current when paired with sleep-mode MCUs. |
| Automotive qualification | NCV prefix indicates AEC-Q100 compliance and extended −40°C to +125°C operation for engine bay and cabin electronics. |
| Ceramic capacitor compatibility | Stable with 0.1 µF–10 µF ceramic output caps - eliminates need for tantalum or aluminum electrolytics, reducing BOM cost and size. |
| Thermal & current protection | Integrated thermal shutdown (trip ~160°C) and current limit (~150 mA) prevent damage during overload or poor heatsinking conditions. |
| Pb-free packaging | RoHS-compliant SC82-AB package with matte tin lead finish - suitable for lead-free reflow profiles per J-STD-020. |
Applications
| Automotive Infotainment Power | Body Control Module Core Supply |
|---|---|
Use Scenario: Powering 1.8 V I/O and core rails of SoCs in head units and digital clusters during ignition-off battery monitoring. IC Role / Device Role / Timing Role: Primary low-noise, always-on LDO delivering regulated 1.8 V to processor I/O banks and memory interfaces. Use Value: 2.5 µA IQ minimizes parasitic drain on 12 V battery; 230 mV dropout sustains regulation during cold-crank transients down to 2.5 V battery. |
Use Scenario: Supplying 1.8 V logic for LIN transceivers and sensor signal conditioning in door modules and seat controllers. IC Role / Device Role / Timing Role: Fixed-output LDO providing clean, stable voltage to mixed-signal ASICs and analog front-ends. Use Value: ±2.0% output accuracy ensures reliable ADC reference and digital logic thresholds; −40°C to +125°C range covers full vehicle operating envelope. |
| Telematics Standby Power | ADAS Camera Sensor Bias |
Use Scenario: Maintaining GPS/GNSS and cellular modem RTC and wake-up circuitry during vehicle sleep mode (CAN/LIN bus monitoring). IC Role / Device Role / Timing Role: Low-quiescent LDO supplying 1.8 V to real-time clock, interrupt controllers, and low-power microcontrollers. Use Value: 2.5 µA IQ extends battery backup life beyond 5 years; SC82-AB package enables placement near RF sections with minimal board area. |
Use Scenario: Biasing 1.8 V analog supply for image sensor I/O and ISP interface in rear-view and surround-view cameras. IC Role / Device Role / Timing Role: Noise-immune LDO delivering regulated 1.8 V to high-speed MIPI CSI-2 transmitter I/O buffers. Use Value: 100 µVrms output noise (100 Hz–100 kHz) prevents pixel noise injection; thermal protection guards against enclosure heat buildup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-IQ automotive LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV662SQ18T1 | Includes Enable pin (Pin 4); otherwise identical electrical specs, package, and temperature rating. | Required where ON/OFF sequencing or system-level power gating is needed - e.g., in modules with deep-sleep firmware states. | Select NCV662SQ18T1 only if active enable control is mandatory; NCV663SQ18T1 reduces routing complexity where always-on operation suffices. |
| TLE4274G V33 | Higher IQ (30 µA), higher dropout (400 mV), 3.3 V fixed output - not pin-compatible; requires redesign of feedback network for 1.8 V use. | Targeted at 3.3 V MCU cores; lacks 1.8 V option and automotive-grade 125°C operation in same package class. | Not a drop-in replacement; consider only if 1.8 V output is not required and higher IQ is acceptable for the application. |
Compared with NCV662SQ18T1, NCV663SQ18T1 removes enable functionality to simplify layout and reduce risk of floating control pins, while retaining identical regulation performance and automotive qualification - making it optimal for always-on subsystems. TLE4274G V33 offers different voltage and higher IQ, requiring system-level redesign and offering no advantage for 1.8 V use cases.
Availability
NCV663SQ18T1 is available at Aetrix Electronics and suitable for automotive infotainment, body control modules, and telematics systems requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for NCV663SQ18T1 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The NCV663SQ18T1 belongs to onsemi's automotive-qualified LDO family, engineered specifically for low-power, high-reliability subsystems in vehicles - emphasizing ultra-low quiescent current, wide temperature operation, and robust transient response.
FAQ
What is the maximum input voltage for the NCV663SQ18T1?
The NCV663SQ18T1 supports a maximum input voltage of 6.0 V, as specified in its Absolute Maximum Ratings table. Exceeding this voltage risks permanent damage. This rating allows safe operation with 5 V rails and transient-clamped 12 V battery inputs when used with appropriate upstream protection circuitry.
Does the NCV663SQ18T1 have an enable pin?
No, the NCV663SQ18T1 does not include an enable pin. Pin 4 is designated N/C (no internal connection), unlike the NCV662SQ18T1 which uses Pin 4 as an active-high enable input. The NCV663SQ18T1 is intended for always-on applications where external control is unnecessary.
What output capacitor value is required for stable operation of the NCV663SQ18T1?
The NCV663SQ18T1 requires a minimum output capacitor of 0.1 µF ceramic, as confirmed in the datasheet's "Typical Applications" and "Applications Information" sections. Larger values (up to 10 µF) improve load transient response and noise rejection but are not required for basic stability.
Is the NCV663SQ18T1 qualified for automotive use?
Yes, the NCV663SQ18T1 carries the NCV prefix, indicating qualification for automotive applications per AEC-Q100. It operates across −40°C to +125°C ambient temperature and includes integrated thermal shutdown and current limiting - features mandated for under-hood and cabin electronics.
What is the dropout voltage of the NCV663SQ18T1 at 100 mA load?
The dropout voltage of the NCV663SQ18T1 is 230 mV maximum at 100 mA output current and −40°C to +125°C ambient temperature, measured as the input-to-output differential when Vout drops 3.0% below nominal. This enables regulation with Vin as low as 2.03 V.
NCV663SQ18T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.7V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 1 µA
- Current - Supply (Max):
- 6 µA
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-82AB
NCV663SQ18T1 FAQ
1.How can I place an order for NCV663SQ18T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV663SQ18T1 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 NCV663SQ18T1 reliable?
The price and inventory of NCV663SQ18T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV663SQ18T1 is usually 5 days.
3.What payment methods are accepted for NCV663SQ18T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV663SQ18T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV663SQ18T1?
NCV663SQ18T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV663SQ18T1 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 NCV663SQ18T1?
For technical support, including NCV663SQ18T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV663SQ18T1 requirements.
6.How does Aetrix verify that NCV663SQ18T1 is sourced from the original manufacturer or authorized distributors?
All NCV663SQ18T1 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 NCV663SQ18T1 meets industry standards.
7.What is the process for return or replacement of NCV663SQ18T1?
All NCV663SQ18T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCV663SQ18T1, 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 NCV663SQ18T1 part is unused and in its original packaging.
Return procedure for NCV663SQ18T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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