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onsemi NCV663SQ18T1G
- Part No.:
- NCV663SQ18T1G
- Manufacturer:
- onsemi
- Package:
- SC-82A, SOT-343
- Datasheet:
-
NCV663SQ18T1G.pdf
- Description:
- IC REG LINEAR 1.8V 100MA SC82AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,971
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Product details
Overview
NCV663SQ18T1G from onsemi is an automotive-grade fixed-output low-dropout linear regulator delivering 1.8 V at up to 100 mA, featuring 2.5 µA typical quiescent current, ±2.0% output voltage accuracy, and operation across −40 °C to +125 °C. It uses a PMOS pass transistor, integrates thermal and current-limit protection, and is designed for battery-powered infotainment systems requiring ultra-low standby power.
For engineers reviewing the NCV663SQ18T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 100 mA (max 500 mV), AEC-Q100 qualification, SC-82AB package compatibility, and absence of enable functionality-critical when replacing NCV662 variants in automotive designs.
Technical Context
The NCV663SQ18T1G implements a PMOS-based LDO architecture with internal voltage reference, error amplifier, and protection circuitry including thermal shutdown and current limiting. It operates without an enable pin-pin 4 is No Connect-distinguishing it from the NCV662 series.
Designed for stable operation with ≥0.1 µF ceramic output capacitance, it achieves 20 mV load regulation (10–100 mA) and 10–20 mV line regulation across input voltages from (VOUT + 1.0 V) to 6.0 V. Its 100 ppm/°C output voltage temperature coefficient ensures stability over its full automotive temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±2.0% - tightly regulated rail for core logic or low-voltage microcontrollers in automotive modules. |
| Max Output Current | 100 mA - sufficient for powering MCU peripherals, sensors, or small ASICs without external boost stages. |
| Quiescent Current | 2.5 µA typical - enables multi-year battery life in always-on vehicle subsystems like door modules or telematics. |
| Dropout Voltage | 500 mV max at 100 mA - supports regulation down to Vin = 2.3 V, compatible with partially discharged Li-ion or 3.3 V system rails. |
| Operating Temp Range | −40 °C to +125 °C - meets AEC-Q100 Grade 1 requirements for under-hood and infotainment applications. |
| Input Voltage Range | 1.8 V to 6.0 V - accommodates wide-input automotive supplies while avoiding overvoltage stress on internal PMOS gate. |
| Thermal Protection | Active shutdown at ~160 °C - prevents latch-up or permanent damage during transient overload or poor PCB heatsinking. |
Pinout & Package
NCV663SQ18T1G is housed in the SC-82AB (Case 419C) surface-mount package: 2.0 × 1.25 × 0.95 mm, 4-pin, lead-free, micro-miniature footprint optimized for space-constrained automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power supply ground reference; must be low-impedance connection to minimize noise coupling and ensure regulation accuracy. |
| 2 | Vin | Input supply pin; accepts 1.8–6.0 V; requires local 1.0 µF ceramic decoupling capacitor placed adjacent to pin. |
| 3 | Vout | Regulated 1.8 V output; stable with ≥0.1 µF ceramic capacitor; supports fast load transients up to 30 mA step change. |
| 4 | N/C | No internal connection; must remain unconnected-no pull-up, pull-down, or routing to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 2.5 µA typical enables >10-year battery life in always-on automotive modules such as keyless entry receivers. |
| AEC-Q100 Qualified | Grade 1 qualification (−40 °C to +125 °C) confirms reliability for engine bay, dashboard, and infotainment ECU deployment. |
| PMOS Pass Device | Eliminates need for external bias supply; enables low dropout and stable operation with ceramic output capacitors ≥0.1 µF. |
| Integrated Protection | Thermal shutdown and current limit prevent failure during short-circuit events or sustained overload without external components. |
| Pb-Free SC-82AB | RoHS-compliant 2.0 × 1.25 mm package supports high-density automotive PCB assembly and reflow compatibility. |
Applications
| Automotive Infotainment | Body Control Module (BCM) |
|---|---|
Use Scenario: Powering audio DSP cores and display interface logic in head-unit systems operating from 5 V or 3.3 V main rails. IC Role / Device Role / Timing Role: Primary 1.8 V LDO supplying digital core voltage for SoC subsystems requiring tight regulation and low noise. Use Value: 2.5 µA quiescent current minimizes standby drain; ±2.0% accuracy ensures reliable logic-level compliance across temperature. |
Use Scenario: Regulating 1.8 V for LIN transceiver controllers and EEPROM interfaces in door module ECUs. IC Role / Device Role / Timing Role: Local point-of-load regulator delivering stable 1.8 V to communication peripherals with minimal BOM count. Use Value: SC-82AB footprint saves board area; thermal shutdown protects against latch-up during LIN bus fault conditions. |
| Advanced Driver Assistance Systems (ADAS) | Telematics Control Unit (TCU) |
Use Scenario: Supplying image sensor interface logic in rear-view camera modules exposed to under-vehicle temperature extremes. IC Role / Device Role / Timing Role: Temperature-stable 1.8 V source for MIPI CSI-2 PHY blocks where voltage drift impacts signal integrity. Use Value: 100 ppm/°C tempco and −40 °C to +125 °C operation maintain timing margin across full vehicle lifecycle. |
Use Scenario: Powering GNSS baseband processors and cellular modem RF front-end bias circuits in always-connected TCU modules. IC Role / Device Role / Timing Role: Low-noise, low-IQ regulator for GPS correlator clocks and LTE modem sleep-mode logic. Use Value: 100 mVPP output noise (100 Hz–100 kHz) prevents phase noise degradation in RF synthesizers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV662SQ18T1G | Includes active-high Enable pin (pin 4); otherwise identical electrical specs and package. | Required where system-level power sequencing or deep-sleep control is needed. | Select NCV662SQ18T1G only if ON/OFF control is mandatory; NCV663SQ18T1G simplifies layout by eliminating enable circuitry. |
| TLV73318PDBVR | Lower IQ (350 nA), higher max current (300 mA), but rated only to +85 °C ambient and not AEC-Q100 qualified. | Suitable for industrial or consumer portable devices-not automotive environments. | Choose TLV73318PDBVR for cost-sensitive non-automotive designs needing higher current; avoid for AEC-Q100-requiring applications. |
Compared with NCV662SQ18T1G, the NCV663SQ18T1G removes enable functionality to reduce complexity and cost in fixed-always-on systems; compared with TLV73318PDBVR, it trades ultra-low IQ for guaranteed automotive qualification and thermal robustness.
Availability
NCV663SQ18T1G is available at Aetrix Electronics and suitable for automotive infotainment, body control modules, and ADAS subsystems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for NCV663SQ18T1G 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 management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The NCV663SQ18T1G belongs to onsemi's automotive-qualified LDO regulator family, engineered specifically for safety-critical and thermally demanding vehicle subsystems where reliability, low quiescent current, and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum input voltage rating for the NCV663SQ18T1G?
The NCV663SQ18T1G has a maximum input voltage rating of 6.0 V, as specified in the Absolute Maximum Ratings table. Exceeding this voltage-even momentarily-may cause permanent damage. The device is designed to operate reliably with input voltages ranging from 1.8 V (equal to its output) up to 6.0 V, making it compatible with common automotive supply rails including 5 V and 3.3 V domains. Always verify input transient suppression in vehicle environments.
Does the NCV663SQ18T1G include an enable function?
No, the NCV663SQ18T1G does not include an enable function. Pin 4 is designated N/C (No Connection) per the datasheet pin function description and typical application diagram. This distinguishes it from the NCV662SQ18T1G, which uses pin 4 as an active-high Enable input. For designs requiring ON/OFF control, the NCV662SQ18T1G or alternative regulators with enable capability must be selected instead of the NCV663SQ18T1G.
What output capacitor value is required for stable operation of the NCV663SQ18T1G?
The NCV663SQ18T1G requires a minimum output capacitor of 0.1 µF, and it is stable with ceramic capacitors across a wide ESR range (a few mΩ to 10 Ω). Unlike older LDOs, it does not require a specific ESR for stability. A 1.0 µF ceramic capacitor is recommended for optimal load transient response, especially in automotive applications with dynamic current demands. Larger values improve noise rejection but are not necessary for basic regulation.
Is the NCV663SQ18T1G qualified for automotive use?
Yes, the NCV663SQ18T1G is AEC-Q100 qualified (Grade 1) and PPAP capable, with an operating ambient temperature range of −40 °C to +125 °C. The "NCV" prefix explicitly denotes automotive and other applications requiring unique site and control change requirements. It includes integrated thermal shutdown and current limiting, and is manufactured in onsemi's certified automotive production facilities-making it suitable for infotainment, BCM, and ADAS applications.
What is the dropout voltage specification for the NCV663SQ18T1G at full load?
The dropout voltage for the NCV663SQ18T1G is specified as 500 mV maximum at 100 mA output current and −40 °C to +125 °C ambient temperature, measured when VOUT drops 3.0% below nominal (i.e., to 1.746 V). At 25 °C, typical dropout is 300 mV. This allows the device to maintain regulation with input as low as 2.3 V, supporting operation from partially discharged batteries or cascaded regulator topologies.
NCV663SQ18T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-82AB
NCV663SQ18T1G FAQ
1.How can I place an order for NCV663SQ18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV663SQ18T1G 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 NCV663SQ18T1G reliable?
The price and inventory of NCV663SQ18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV663SQ18T1G is usually 5 days.
3.What payment methods are accepted for NCV663SQ18T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV663SQ18T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV663SQ18T1G?
NCV663SQ18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV663SQ18T1G 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 NCV663SQ18T1G?
For technical support, including NCV663SQ18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV663SQ18T1G requirements.
6.How does Aetrix verify that NCV663SQ18T1G is sourced from the original manufacturer or authorized distributors?
All NCV663SQ18T1G 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 NCV663SQ18T1G meets industry standards.
7.What is the process for return or replacement of NCV663SQ18T1G?
All NCV663SQ18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCV663SQ18T1G, 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 NCV663SQ18T1G part is unused and in its original packaging.
Return procedure for NCV663SQ18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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