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onsemi NCP663SQ18T1G
- Part No.:
- NCP663SQ18T1G
- Manufacturer:
- onsemi
- Package:
- SC-82A, SOT-343
- Datasheet:
-
NCP663SQ18T1G.pdf
- Description:
- IC REG LINEAR 1.8V 100MA SC82AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,649
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Product details
Overview
NCP663SQ18T1G from onsemi is a fixed-output, 1.8 V, 100 mA CMOS low-dropout linear regulator in SC-82AB package, featuring 2.5 µA typical quiescent current, ±2.0% output voltage accuracy, and dropout voltage of 500 mV at 100 mA load - designed for battery-powered instrumentation requiring ultra-low standby power.
For engineers reviewing the NCP663SQ18T1G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 100 mA output capability with 2.5 µA IQ, thermal shutdown protection, compatibility with 0.1 µF ceramic output capacitors, and operation across −40 °C to +85 °C ambient temperature.
Technical Context
The NCP663SQ18T1G integrates a PMOS pass transistor, error amplifier, voltage reference, and thermal/overcurrent protection circuits - eliminating need for external compensation. It operates without an enable pin (N/C on Pin 4), distinguishing it from the NCP662 series which includes Enable functionality.
This device delivers stable 1.8 V regulation with 100 ppm/°C temperature coefficient and 100 µVRMS output noise (100 Hz–100 kHz), supporting precision analog and low-noise digital subsystems where supply ripple and quiescent consumption are critical constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±2.0% (ensures reliable logic-level supply for 1.8 V microcontrollers and sensors) |
| Max Output Current | 100 mA (supports moderate-power peripherals like ADCs, RF transceivers, or small displays) |
| Quiescent Current | 2.5 µA typical (enables multi-year battery life in always-on monitoring devices) |
| Dropout Voltage | 500 mV at 100 mA (allows operation down to 2.3 V input, compatible with single Li-ion or two alkaline cells) |
| Input Voltage Range | Up to 6.0 V (supports wide-input industrial and automotive auxiliary rails) |
| Thermal Protection | Internal shutdown at ~160 °C (prevents damage during sustained overload or poor PCB thermal design) |
| Output Capacitor | Minimum 0.1 µF ceramic (enables compact, low-BOM-cost designs without ESR constraints) |
Pinout & Package
Package: SC-82AB (micro-miniature surface-mount, 1.8 mm × 1.2 mm × 0.9 mm, 4-pin, Pb-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power ground reference; must be low-impedance connection to minimize noise coupling and ensure regulation stability |
| 2 | Vin | Unregulated input supply; accepts 1.8 V to 6.0 V; requires local 1.0 µF decoupling capacitor |
| 3 | Vout | Regulated 1.8 V output; connects directly to load; supports 0.1 µF–10 µF ceramic or tantalum capacitors |
| 4 | N/C | No internal connection; left unconnected or tied to GND per layout best practice; not usable as enable or feedback |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 2.5 µA typical enables >10-year battery life in IoT sensor nodes drawing <10 µA average current |
| Fixed 1.8 V output | Eliminates external resistor network; reduces BOM count and layout area for space-constrained wearables |
| SC-82AB package | 0.9 mm profile and 1.8 mm × 1.2 mm footprint supports high-density portable PCBs with minimal thermal mass |
| Thermal & current protection | Integrated shutdown prevents failure under short-circuit or overheating - no external circuitry required |
| 0.1 µF minimum Cout | Enables use of low-cost, small-footprint X5R/X7R ceramics - avoids costly tantalum or polymer capacitors |
Applications
| Portable Medical Sensors | Industrial Handheld Meters |
|---|---|
Use Scenario: Continuous glucose monitor with BLE radio and low-power MCU operating from coin-cell battery. IC Role / Device Role / Timing Role: Primary 1.8 V supply for ADC, sensor interface, and BLE SoC core domain. Use Value: 2.5 µA IQ extends battery life beyond 2 years; 500 mV dropout allows full utilization of 3.0 V CR2032 cell voltage range. |
Use Scenario: Ruggedized multimeter with LCD display and isolated serial interface powered by AA batteries. IC Role / Device Role / Timing Role: Clean 1.8 V rail for precision analog front-end and microcontroller I/O bank. Use Value: ±2.0% output accuracy ensures consistent ADC reference scaling; thermal protection prevents field failures during extended use. |
| Automotive Cabin Sensors | Wearable Fitness Trackers |
Use Scenario: Occupant detection module mounted near dashboard, exposed to −40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: Regulated 1.8 V supply for capacitive touch controller and CAN/LIN transceiver interface. Use Value: Guaranteed operation across full industrial temperature range; AEC-Q100 qualified variants available (NCV663SQ18T1G). |
Use Scenario: Heart-rate monitor using optical sensor and ARM Cortex-M0+ MCU, worn continuously for 7 days. IC Role / Device Role / Timing Role: Main power source for sensor signal chain and Bluetooth LE radio subsystem. Use Value: Low 100 µVRMS noise prevents interference with sensitive photodiode measurements; SC-82AB footprint fits tight wristband PCB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT | 250 mV dropout at 100 mA; 1.6 µA IQ; SOT-23-3 package (3-pin, no N/C) | Lacks thermal shutdown; requires minimum 1.0 µF output capacitor | Preferred where lower dropout and smaller IQ are critical, and thermal robustness is managed externally |
| Torex XC6206P182MR-G | 350 mV dropout at 100 mA; 1.0 µA IQ; SOT-25 package (5-pin, includes CE) | Includes active-high enable; tighter 1.0% initial accuracy but narrower 2.0–6.0 V input range | Chosen when system-level power sequencing or deeper sleep modes are required via enable control |
Compared with MCP1700T-1802E/TT and XC6206P182MR-G, the NCP663SQ18T1G offers superior thermal protection and relaxed output capacitor requirements (0.1 µF), making it more suitable for cost-sensitive, high-reliability portable instrumentation where layout space and safety margins are constrained.
Availability
NCP663SQ18T1G is available at Aetrix Electronics and suitable for portable medical sensors, industrial handheld meters, automotive cabin sensors, and wearable fitness trackers requiring stable component supply with long-term lifecycle support.
Supply support for NCP663SQ18T1G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP663SQ18T1G belongs to onsemi's NCP663 fixed-output LDO family, engineered specifically for ultra-low-power battery-operated equipment where minimal quiescent current and small footprint are mandatory design constraints.
FAQ
What is the maximum input voltage rating for the NCP663SQ18T1G?
The NCP663SQ18T1G has a maximum input voltage rating of 6.0 V, as specified in the Absolute Maximum Ratings table. Exceeding this voltage may cause permanent damage. This rating allows safe operation from common sources including 5 V USB-derived rails, dual alkaline batteries (up to ~3.2 V), or regulated 3.3 V/5 V system supplies feeding the NCP663SQ18T1G.
Does the NCP663SQ18T1G include an enable pin?
No, the NCP663SQ18T1G does not include an enable pin. Pin 4 is marked N/C (No Connection) in the datasheet and has no internal function. Unlike the NCP662 series, the NCP663 variant omits enable functionality - power control must be implemented externally via input rail switching or upstream regulators.
What is the minimum output capacitor required for stable operation of the NCP663SQ18T1G?
The NCP663SQ18T1G requires a minimum output capacitor of 0.1 µF ceramic, as confirmed in both the datasheet's "Features" section and "Applications Information" page. Larger values (e.g., 1.0 µF) improve load transient response and noise rejection, but the device remains stable with the 0.1 µF minimum - enabling compact, low-cost designs.
What is the dropout voltage of the NCP663SQ18T1G at full rated load?
The dropout voltage of the NCP663SQ18T1G is 500 mV typical at 100 mA output current and 25 °C, measured when Vout drops 3.0% below nominal (i.e., to 1.746 V). This value increases slightly at higher temperatures and lower input voltages, remaining within 700 mV across the full −40 °C to +85 °C operating range.
Is the NCP663SQ18T1G suitable for automotive applications?
The standard NCP663SQ18T1G is rated for −40 °C to +85 °C and is not AEC-Q100 qualified. However, the pin-compatible NCV663SQ18T1G variant is automotive-grade, AEC-Q100 qualified, and PPAP capable - designed explicitly for infotainment, body electronics, and cabin sensor modules requiring automotive reliability standards.
NCP663SQ18T1G 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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-82AB
NCP663SQ18T1G FAQ
1.How can I place an order for NCP663SQ18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP663SQ18T1G 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 NCP663SQ18T1G reliable?
The price and inventory of NCP663SQ18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP663SQ18T1G is usually 5 days.
3.What payment methods are accepted for NCP663SQ18T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP663SQ18T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP663SQ18T1G?
NCP663SQ18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP663SQ18T1G 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 NCP663SQ18T1G?
For technical support, including NCP663SQ18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP663SQ18T1G requirements.
6.How does Aetrix verify that NCP663SQ18T1G is sourced from the original manufacturer or authorized distributors?
All NCP663SQ18T1G 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 NCP663SQ18T1G meets industry standards.
7.What is the process for return or replacement of NCP663SQ18T1G?
All NCP663SQ18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP663SQ18T1G, 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 NCP663SQ18T1G part is unused and in its original packaging.
Return procedure for NCP663SQ18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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