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onsemi NCV662SQ18T1G
- Part No.:
- NCV662SQ18T1G
- Manufacturer:
- onsemi
- Package:
- SC-82A, SOT-343
- Datasheet:
-
NCV662SQ18T1G.pdf
- Description:
- IC REG LINEAR 1.8V 100MA SC82AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,371
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Product details
Overview
NCV662SQ18T1G from onsemi is an automotive-grade, fixed-output 1.8 V low-dropout linear regulator with 100 mA output capability, ultra-low 2.5 µA quiescent current, ±2.0% output voltage accuracy, and integrated enable control - designed for battery-powered infotainment modules requiring stable low-power voltage regulation.
For engineers reviewing the NCV662SQ18T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 100 mA (max 500 mV), AEC-Q100 qualification, −40 °C to +125 °C operating range, SC-82AB package compatibility, and enable threshold voltage (1.3 V logic high / 0.5 V logic low).
Technical Context
The NCV662SQ18T1G implements a PMOS pass transistor architecture enabling low dropout performance and inherent reverse-current blocking. Its internal circuitry includes a precision voltage reference, error amplifier, thermal shutdown, and current-limit protection - all optimized for minimal ground current under light-load conditions.
It operates with ceramic output capacitors as low as 0.1 µF and supports ON/OFF control via a dedicated enable pin with defined logic thresholds. The device is specified for input voltages up to 6.0 V and maintains regulation down to Vin = Vout + dropout, with line regulation ≤20 mV across its full input range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2.0% over −40 °C to +125 °C, ensuring stable core supply for automotive microcontrollers. |
| Max Output Current | 100 mA continuous, sufficient for powering low-power DSPs, sensors, or interface ICs in infotainment systems. |
| Quiescent Current | 2.5 µA typical (Enable = 0 V), enabling multi-year battery life in always-on vehicle subsystems. |
| Dropout Voltage | 500 mV max at 100 mA load, allowing operation from partially discharged 3.3 V or 5 V rails without regulation loss. |
| Input Voltage Range | 1.8 V to 6.0 V, supporting direct connection to common automotive supply domains including post-ignition 5 V and 3.3 V domains. |
| Enable Threshold | Logic-high turn-on at ≥1.3 V, logic-low turn-off at ≤0.5 V - compatible with standard 3.3 V or 5 V GPIOs without level-shifting. |
| Thermal Protection | Internal shutdown at ~160 °C junction temperature, preventing damage during sustained overload or poor PCB thermal design. |
Pinout & Package
The NCV662SQ18T1G is housed in the SC-82AB (Case 419C) surface-mount package - a 4-pin, 2.0 × 1.25 mm micro-miniature leadless package with exposed thermal pad, optimized for space-constrained automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power supply ground reference and primary thermal path; must be connected to large copper pour for thermal management. |
| 2 | Vin | Input supply pin; accepts 1.8–6.0 V; requires local 1.0 µF decoupling capacitor placed adjacent to pin. |
| 3 | Vout | Regulated 1.8 V output; minimum 0.1 µF ceramic capacitor required; larger values improve transient response. |
| 4 | Enable | Active-high digital control input; pull to Vin for always-on operation; pull to GND to disable output and reduce IQ to 0.1 µA. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Qualified to Grade 1 (−40 °C to +125 °C), meeting automotive reliability and stress-test requirements for infotainment ECUs. |
| Ultra-Low Quiescent Current | 2.5 µA typical enables >10-year shelf life in battery-backed modules and meets ISO 16750-2 sleep-mode current budgets. |
| Stable with Low-ESR Capacitors | Supports 0.1 µF–10 µF ceramic or tantalum output capacitors without oscillation, eliminating need for ESR tuning. |
| Integrated Protection | Includes current limit, thermal shutdown, and reverse-current blocking - no external components needed for basic fault resilience. |
| Pb-Free & RoHS Compliant | SC-82AB package meets J-STD-609 Class 3 moisture sensitivity and automotive ELV directive requirements. |
Applications
| Automotive Infotainment | Telematics Control Unit |
|---|---|
Use Scenario: Powering audio codec, display driver, or Bluetooth baseband IC in head-unit systems with strict low-power sleep requirements. IC Role / Device Role / Timing Role: Primary 1.8 V LDO supplying core logic voltage for SoC peripherals, with enable synchronized to ignition state. Use Value: 2.5 µA quiescent current ensures <1 µA system standby draw when host MCU disables NCV662SQ18T1G via Enable pin. | Use Scenario: Regulating 1.8 V supply for GNSS receiver front-end and cellular modem baseband in connected car telematics modules. IC Role / Device Role / Timing Role: Secondary LDO delivering clean, low-noise 1.8 V rail isolated from noisy 3.3 V power domain. Use Value: 100 mVpp output noise (100 Hz–100 kHz) and 20 mV load regulation minimize RF interference and timing jitter in GPS signal acquisition. |
| ADAS Camera Module | Body Control Module Sensor Hub |
Use Scenario: Providing regulated 1.8 V to image sensor I/O interface and ISP logic in rear-view or surround-view camera ECUs. IC Role / Device Role / Timing Role: Dedicated low-noise LDO for sensor digital interface, decoupled from main 3.3 V camera rail. Use Value: 500 mV max dropout allows reliable operation even when input drops to 2.3 V during cold-crank events (ISO 16750-2 Pulse 4). | Use Scenario: Powering multiple low-power LIN transceivers and environmental sensors (temp/humidity/pressure) in centralized body electronics nodes. IC Role / Device Role / Timing Role: Multi-rail LDO source enabling independent enable/disable of sensor sub-systems to meet ULP wake-up budgets. Use Value: Enable pin logic thresholds (1.3 V/0.5 V) allow direct control from 3.3 V microcontroller GPIO without external level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV8170ASN180T1G | Higher 300 mA output, 1.2 µA IQ, but larger SOT-563 package and no enable pin. | Lacks ON/OFF control - unsuitable where dynamic power gating is required. | Select if higher current and lower IQ outweigh need for enable functionality and smaller footprint. |
| TLV73318PDBVR | 1.8 V, 300 mA, 35 µA IQ, SOT-23-5 with enable, but not AEC-Q100 qualified. | Not automotive-qualified - limited to industrial or consumer use cases. | Select only for non-automotive designs where cost or availability outweighs qualification requirements. |
Compared with NCV662SQ18T1G, NCV8170ASN180T1G offers higher current and lower IQ but forfeits enable control and compact SC-82AB size, while TLV73318PDBVR provides greater current and enable functionality but lacks AEC-Q100 qualification and has 14× higher quiescent current - making NCV662SQ18T1G the optimal choice for space-constrained, automotive-grade 100 mA LDO applications requiring ultra-low IQ and enable.
Availability
NCV662SQ18T1G is available at Aetrix Electronics and suitable for automotive infotainment, telematics control units, ADAS camera modules, and body control module sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for NCV662SQ18T1G 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 supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV662SQ18T1G belongs to onsemi's automotive-qualified LDO regulator product line, engineered specifically for low-power, high-reliability voltage regulation in harsh-temperature vehicle subsystems.
FAQ
What is the maximum input voltage rating for the NCV662SQ18T1G?
The NCV662SQ18T1G has a maximum input voltage rating of 6.0 V, as specified in the Absolute Maximum Ratings table. Operation above this voltage may cause permanent damage. This rating applies across the full −40 °C to +125 °C operating ambient range and is independent of output load or enable state. The device is designed to maintain regulation down to Vin = Vout + dropout (≤500 mV at 100 mA), making it suitable for use with nominal 3.3 V or 5 V automotive rails.
Does the NCV662SQ18T1G require an external output capacitor, and what is the minimum value?
Yes, the NCV662SQ18T1G requires an external output capacitor for stability and transient performance. The minimum recommended value is 0.1 µF ceramic, as confirmed in both the datasheet's "Typical Applications" section and Electrical Characteristics notes. Larger values (e.g., 1.0 µF) improve load transient response and noise rejection. The regulator is stable with ESR ranging from a few milliohms up to 10 Ω, eliminating the need for ESR-tuned tantalum capacitors.
Is the NCV662SQ18T1G pin-compatible with other devices in the NCV662/NCP662 family?
Yes, the NCV662SQ18T1G shares identical pinout and SC-82AB package dimensions with all NCV662 and NCP662 variants (e.g., NCV662SQ25T1G, NCP662SQ18T1G), as verified in the Pin Connections & Marking Diagrams section. All use the same 4-pin top-view layout: Pin 1 = GND, Pin 2 = Vin, Pin 3 = Vout, Pin 4 = Enable. This allows drop-in replacement across output voltage variants without PCB redesign - provided thermal and electrical constraints (e.g., dropout, load current) remain within specification.
What is the enable pin behavior of the NCV662SQ18T1G under different voltage conditions?
The NCV662SQ18T1G enable pin is active-high with defined thresholds: output turns on when enable voltage rises to ≥1.3 V (logic high), and turns off when it falls to ≤0.5 V (logic low). When disabled, quiescent current drops to 0.1 µA typical. If unused, the pin must be tied to Vin to ensure default ON operation - floating the pin is not permitted per datasheet guidance. This behavior is exclusive to NCV662/NCP662 devices; NCV663/NCP663 variants replace Enable with N/C.
How does the NCV662SQ18T1G perform under automotive temperature extremes?
The NCV662SQ18T1G is fully specified from −40 °C to +125 °C ambient temperature, meeting AEC-Q100 Grade 1 requirements. Output voltage remains within ±2.0% tolerance across this range, dropout voltage stays ≤500 mV at 100 mA, and quiescent current remains ≤6.0 µA. Thermal shutdown activates at ~160 °C junction temperature, providing robust protection during sustained overload or poor heatsinking - critical for under-hood or dashboard-mounted infotainment applications.
NCV662SQ18T1G 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 ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-82AB
NCV662SQ18T1G FAQ
1.How can I place an order for NCV662SQ18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV662SQ18T1G 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 NCV662SQ18T1G reliable?
The price and inventory of NCV662SQ18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV662SQ18T1G is usually 5 days.
3.What payment methods are accepted for NCV662SQ18T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV662SQ18T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV662SQ18T1G?
NCV662SQ18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV662SQ18T1G 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 NCV662SQ18T1G?
For technical support, including NCV662SQ18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV662SQ18T1G requirements.
6.How does Aetrix verify that NCV662SQ18T1G is sourced from the original manufacturer or authorized distributors?
All NCV662SQ18T1G 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 NCV662SQ18T1G meets industry standards.
7.What is the process for return or replacement of NCV662SQ18T1G?
All NCV662SQ18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCV662SQ18T1G, 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 NCV662SQ18T1G part is unused and in its original packaging.
Return procedure for NCV662SQ18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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