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onsemi NCP662SQ18T1G
- Part No.:
- NCP662SQ18T1G
- Manufacturer:
- onsemi
- Package:
- SC-82A, SOT-343
- Datasheet:
-
NCP662SQ18T1G.pdf
- Description:
- IC REG LINEAR 1.8V 100MA SC82AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,893
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Product details
Overview
NCP662SQ18T1G from onsemi is a fixed-output, 1.8 V, 100 mA CMOS low-dropout linear regulator with ultra-low quiescent current (2.5 µA typical), enable control, and ±2.0% output voltage accuracy over −40 °C to +85 °C. It uses a PMOS pass transistor, supports ceramic output capacitors as low as 0.1 µF, and targets battery-powered portable electronics requiring stable low-power voltage regulation.
For engineers reviewing the NCP662SQ18T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 100 mA (500 mV max), thermal shutdown protection, SC-82AB package footprint, and enable threshold compatibility with 1.8 V logic systems.
Technical Context
The NCP662SQ18T1G integrates a voltage reference, error amplifier, and PMOS power transistor in a single die. Its enable input (pin 4) provides active-high ON/OFF control with defined turn-on/turn-off thresholds (1.3 V / 0.5 V), and it features internal current limit and thermal shutdown circuits triggered at ~160 °C.
Designed for stability with low-ESR ceramic capacitors, the device achieves load regulation of ≤40 mV across 10–100 mA and line regulation of ≤20 mV over input voltage ranges up to 6.0 V. Dropout is specified at 500 mV (max) under full 100 mA load at 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±2.0% (ensures stable supply for 1.8 V logic rails) |
| Max Output Current | 100 mA (supports microcontrollers, sensors, and RF front-ends) |
| Quiescent Current | 2.5 µA typical (enables multi-year battery life in always-on devices) |
| Dropout Voltage | 500 mV max at 100 mA (allows operation down to Vin = 2.3 V) |
| Enable Threshold | VTH(HI) = 1.3 V, VTH(LO) = 0.5 V (compatible with 1.8 V GPIO) |
| Operating Temp | −40 °C to +85 °C (industrial-grade ambient range) |
| Input Voltage Range | 1.9 V to 6.0 V (covers single-cell Li-ion, dual-cell alkaline, and USB inputs) |
Pinout & Package
The NCP662SQ18T1G 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 portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power ground reference; must be low-impedance connection to PCB ground plane |
| 2 | Vin | Input supply (1.9–6.0 V); requires local 1.0 µF decoupling capacitor |
| 3 | Vout | Regulated 1.8 V output; supports 0.1 µF minimum ceramic capacitor |
| 4 | Enable | Active-high digital control; tie to Vin if unused; enables system-level power sequencing |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 2.5 µA typical enables >10-year battery life in IoT sensors |
| Enable Control | Digital ON/OFF via pin 4 eliminates need for external FET in power-gating schemes |
| Ceramic Cap Compatible | Stable with 0.1 µF output capacitor-reduces BOM cost and board area vs. tantalum |
| Thermal Protection | Internal shutdown at ~160 °C prevents damage during overload or poor heatsinking |
| ±2.0% Accuracy | Tight initial tolerance ensures reliable operation of 1.8 V core logic without margining |
Applications
| Wearable Health Monitor | Industrial Sensor Node |
|---|---|
Use Scenario: Continuous ECG signal acquisition powered by coin-cell battery. IC Role / Device Role / Timing Role: Primary 1.8 V supply for ultra-low-power MCU and analog front-end. Use Value: 2.5 µA quiescent current extends battery life beyond 3 years while maintaining ±2.0% regulation during sensor bursts. | Use Scenario: Wireless temperature/humidity node in factory automation cabinet. IC Role / Device Role / Timing Role: Local LDO for 1.8 V digital interface (I²C/SPI) and ADC reference. Use Value: SC-82AB footprint fits tight PCB layouts; thermal shutdown protects against enclosure overheating. |
| Smart Camera Module | Automotive Body Control Unit |
Use Scenario: Always-on motion detection subsystem in battery-backed security camera. IC Role / Device Role / Timing Role: Standby power rail for image sensor wake-up logic and microcontroller RTC. Use Value: Enable pin allows host SoC to gate power, reducing system sleep current to sub-µA levels. | Use Scenario: Non-safety-critical infotainment peripheral (e.g., USB hub, display backlight controller). IC Role / Device Role / Timing Role: Secondary 1.8 V supply derived from 5 V vehicle bus. Use Value: −40 °C to +85 °C rating meets automotive ambient requirements; 6.0 V max input handles load-dump transients. |
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 | Same 1.8 V output, 250 mA rating, but higher IQ (1.6 µA typ) and no enable pin | Lacks enable control; unsuitable for dynamic power gating | Choose only if higher output current is required and enable functionality is unnecessary |
| TPS7A0518PDBVR | 1.8 V, 200 mA, 250 nA IQ, enable pin, but larger SOT-23-5 package | Lower quiescent current but requires PCB redesign due to different pinout and size | Select when nanoscale IQ is critical and layout flexibility exists for SOT-23-5 |
Compared with MCP1700T-1802E/TT and TPS7A0518PDBVR, the NCP662SQ18T1G uniquely balances ultra-low IQ, integrated enable, SC-82AB miniaturization, and industrial temperature support-making it optimal for compact, battery-sensitive 1.8 V systems where pin count and footprint are constrained.
Availability
NCP662SQ18T1G is available at Aetrix Electronics and suitable for wearable health monitors, industrial sensor nodes, smart camera modules, and automotive body control units requiring stable component supply across extended product lifecycles.
Supply support for NCP662SQ18T1G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP662 series belongs to onsemi's precision low-IQ LDO family, engineered specifically for handheld communication equipment and portable battery-powered devices demanding minimal standby power and high output accuracy.
FAQ
What is the maximum input voltage rating for the NCP662SQ18T1G?
The NCP662SQ18T1G has an absolute maximum input voltage of 6.0 V. Operation above this level risks permanent damage. For reliable long-term use, design with Vin ≤ 5.5 V under worst-case conditions, especially when combined with transient spikes or thermal stress.
Does the NCP662SQ18T1G require an external pull-up resistor on its Enable pin?
No. The NCP662SQ18T1G does not require an external pull-up on the Enable pin. If unused, the Enable pin must be directly connected to Vin per the datasheet recommendation. Adding a pull-up resistor introduces unnecessary leakage and may interfere with precise threshold behavior.
Can the NCP662SQ18T1G operate with a 0.1 µF ceramic output capacitor?
Yes. The NCP662SQ18T1G is explicitly characterized and guaranteed stable with a minimum 0.1 µF ceramic output capacitor. Larger values (e.g., 1.0 µF) improve load transient response and noise rejection, but 0.1 µF meets all stability requirements per the datasheet.
What is the dropout voltage of the NCP662SQ18T1G at 100 mA load and 25 °C?
At 100 mA load and 25 °C, the NCP662SQ18T1G exhibits a typical dropout voltage of 500 mV, with a maximum specification of 700 mV. This means the device maintains regulation as long as Vin ≥ 2.3 V (1.8 V + 0.5 V) under nominal conditions.
Is the NCP662SQ18T1G qualified for automotive applications?
No-the NCP662SQ18T1G is the commercial-grade variant (NCP prefix), rated for −40 °C to +85 °C. For automotive use, select the NCV662SQ18T1G, which carries the NCV prefix, is AEC-Q100 qualified, and operates from −40 °C to +125 °C.
NCP662SQ18T1G 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:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-82AB
NCP662SQ18T1G FAQ
1.How can I place an order for NCP662SQ18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP662SQ18T1G 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 NCP662SQ18T1G reliable?
The price and inventory of NCP662SQ18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP662SQ18T1G is usually 5 days.
3.What payment methods are accepted for NCP662SQ18T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP662SQ18T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP662SQ18T1G?
NCP662SQ18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP662SQ18T1G 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 NCP662SQ18T1G?
For technical support, including NCP662SQ18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP662SQ18T1G requirements.
6.How does Aetrix verify that NCP662SQ18T1G is sourced from the original manufacturer or authorized distributors?
All NCP662SQ18T1G 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 NCP662SQ18T1G meets industry standards.
7.What is the process for return or replacement of NCP662SQ18T1G?
All NCP662SQ18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP662SQ18T1G, 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 NCP662SQ18T1G part is unused and in its original packaging.
Return procedure for NCP662SQ18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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