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onsemi NCV612SQ18T2G
- Part No.:
- NCV612SQ18T2G
- Manufacturer:
- onsemi
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
NCV612SQ18T2G.pdf
- Description:
- IC REG LINEAR 1.8V 100MA SC88A
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
NCV612SQ18T2G from onsemi is an automotive-grade, fixed-output CMOS low-dropout linear regulator delivering 1.8 V at up to 100 mA with ultra-low 40 µA quiescent current and 230 mV dropout at full load. It integrates PMOS pass transistor, thermal shutdown, current limiting, and enable control in SC70-5 package - designed for battery-powered infotainment modules and ADAS sensors requiring stable low-voltage bias under wide temperature variation.
For engineers reviewing the NCV612SQ18T2G datasheet, pinout, applications, or equivalent options, key selection criteria include AEC-Q100 qualification, −40 °C to +125 °C operation, 2.0% output accuracy, and compatibility with 1.0 µF ceramic output capacitors without ESR constraints.
Technical Context
The NCV612SQ18T2G uses a PMOS pass transistor architecture enabling low dropout and near-zero ground current increase under load. Its internal error amplifier maintains regulation across input voltages from 3.0 V to 6.0 V while rejecting line transients up to 70 dB at 1 kHz.
Enable logic operates with 0.3 V (low) / 0.95 V (high) thresholds, allowing direct connection to microcontroller GPIOs. Thermal protection activates at ~160 °C junction temperature, and output voltage exhibits ±100 ppm/°C temperature coefficient over −40 °C to +125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±2.0% (ensures stable core/bias rail for 1.8 V logic and analog sensors) |
| Max Output Current | 100 mA (supports multiple low-power ICs or single SoC I/O domain) |
| Quiescent Current | 40 µA typical (enables >1-year battery life in always-on vehicle modules) |
| Dropout Voltage | 230 mV at 100 mA (allows operation down to 2.03 V input, critical for cold-crank scenarios) |
| Operating Temp Range | −40 °C to +125 °C (meets AEC-Q100 Grade 1 requirements for under-hood use) |
| Line Regulation | 3.0 mV/V (minimizes output shift during alternator voltage fluctuations) |
| Load Regulation | 0.8 mV/mA (maintains tight voltage under dynamic sensor or MCU sleep/wake transitions) |
Pinout & Package
NCV612SQ18T2G is housed in SC70-5 (SOT-353) surface-mount package - 2.2 mm × 1.35 mm footprint with 0.65 mm pitch - optimized for space-constrained automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply (3.0–6.0 V); requires local 1.0 µF decoupling capacitor |
| 2 | Gnd | Power ground reference; must connect to low-impedance ground plane |
| 3 | Enable | Active-high digital control (0.95 V threshold); tie to Vin if always-on operation required |
| 4 | N/C | No internal connection; leave unconnected or float - not usable as feedback or bypass |
| 5 | Vout | Regulated 1.8 V output; supports 1.0 µF ceramic capacitor with ESR up to 5 Ω |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Validated for automotive applications including PPAP compliance and zero-defect manufacturing controls |
| Ultra-Low IQ | 40 µA quiescent current enables <1 µA system standby when paired with enable-controlled power sequencing |
| Pb-Free SC70-5 | RoHS-compliant 5-pin package with thermal pad omitted - suitable for reflow and conformal coating |
| Wide Input Range | Operates from 3.0 V to 6.0 V input, covering nominal 3.3 V, 5 V rails and degraded battery conditions |
| Ceramic-Cap Stable | No minimum ESR requirement allows use of low-cost, high-reliability X5R/X7R MLCCs without stability risk |
Applications
| Infotainment Power Rail | ADAS Camera Bias Supply |
|---|---|
|
Use Scenario: Providing clean 1.8 V bias to display interface ICs and touch controller in automotive head units. IC Role / Device Role / Timing Role: Primary LDO regulator supplying core voltage to LVDS transmitter and MIPI D-PHY receiver circuits. Use Value: 2.0% output accuracy and 70 dB ripple rejection ensure pixel integrity and reduce video artifacts during engine cranking. |
Use Scenario: Powering image signal processor (ISP) I/O banks and CIS analog front-end in surround-view camera modules. IC Role / Device Role / Timing Role: Low-noise, enable-controlled voltage source for sensor bias and digital I/O domains with fast turn-on response (<1 ms). Use Value: 40 µA IQ and −40 °C to +125 °C rating support always-on vision systems meeting ASIL-B functional safety constraints. |
| Telematics Modem Core Supply | Body Control Module Sensor Hub |
|
Use Scenario: Delivering regulated 1.8 V to cellular modem baseband processor and GNSS RF section in telematics control units. IC Role / Device Role / Timing Role: Secondary LDO following buck converter, providing isolated low-noise rail for sensitive RF and timing circuitry. Use Value: 230 mV dropout ensures uninterrupted operation during 12 V battery sag to 9 V, preventing modem disconnect events. |
Use Scenario: Powering multi-sensor fusion hub (accelerometer, gyro, ambient light, humidity) in door modules and pillar ECUs. IC Role / Device Role / Timing Role: Always-on LDO with enable pin synchronized to CAN wake-up frame for rapid sensor initialization. Use Value: Enable threshold compatibility with 3.3 V MCU GPIO eliminates level-shifter need, reducing BOM count and layout area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73318PDBVR | 1.8 V, 300 mA, 65 µA IQ, SOT-23-5; higher current but wider temp range (−40 °C to +125 °C not AEC-Q100 qualified) | Industrial IoT gateways where automotive qualification is unnecessary | Select when higher output current is needed and AEC-Q100 is not mandated |
| TPS7A0518PDQNR | 1.8 V, 200 mA, 25 µA IQ, X2SON-4; smaller 4-pin package but no enable pin and non-automotive grade | Space-constrained consumer wearables requiring lowest possible IQ | Select only for non-automotive designs where enable control and qualification are not required |
Compared with TLV73318PDBVR and TPS7A0518PDQNR, the NCV612SQ18T2G uniquely combines AEC-Q100 Grade 1 qualification, enable functionality, and proven SC70-5 reliability in automotive thermal cycling - making it the sole choice for production-tier vehicle electronics where functional safety and long-term supply continuity are mandatory.
Availability
NCV612SQ18T2G is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and telematics control units requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for NCV612SQ18T2G 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 - with leadership in power management, imaging, and intelligent sensing.
The NCV612SQ18T2G belongs to onsemi's automotive-qualified LDO regulator family, engineered specifically for reliable low-voltage biasing in harsh-temperature vehicle subsystems where AEC-Q100 compliance and long-term supply assurance are essential.
FAQ
What is the maximum input voltage rating for the NCV612SQ18T2G?
The NCV612SQ18T2G has an absolute maximum input voltage of 6.0 V. Operation above this level risks permanent damage. The device is specified for continuous operation between 3.0 V and 6.0 V input, supporting both nominal 3.3 V and 5 V supply rails as well as degraded battery conditions encountered in automotive environments. This range ensures compatibility with common pre-regulated domains feeding the NCV612SQ18T2G.
Does the NCV612SQ18T2G require an external resistor network for output voltage setting?
No, the NCV612SQ18T2G is a fixed-output regulator with internally trimmed 1.8 V reference. No external resistors are needed - the output voltage is factory-set and guaranteed within ±2.0% over temperature and load. This simplifies design, reduces BOM count, and improves long-term stability compared to adjustable LDOs requiring precision external feedback networks.
Can the NCV612SQ18T2G be used without connecting the Enable pin?
Yes - if always-on operation is required, the Enable pin (Pin 3) must be connected directly to Vin. Leaving it floating is not permitted per datasheet guidance, as undefined logic states may cause erratic startup or increased leakage. The NCV612SQ18T2G draws only 40 µA quiescent current when enabled, making it suitable for low-power always-on vehicle subsystems.
Is the NCV612SQ18T2G compatible with 1.0 µF ceramic output capacitors?
Yes, the NCV612SQ18T2G is explicitly designed for stability with 1.0 µF ceramic capacitors - including X5R and X7R dielectrics - and tolerates ESR values from near-zero up to 5 Ω. Unlike many older LDOs, it imposes no minimum ESR requirement, eliminating the need for tantalum or aluminum electrolytic capacitors and reducing cost, size, and failure risk in automotive applications.
What thermal protection features does the NCV612SQ18T2G include?
The NCV612SQ18T2G integrates internal thermal shutdown that activates at approximately 160 °C junction temperature. When triggered, the regulator disables output until junction temperature falls below the hysteresis threshold (~140 °C), then automatically recovers. This protects against sustained overload or poor PCB thermal design. Its SC70-5 package has RJA = 300 °C/W, so proper copper pour under Pin 2 (Gnd) is essential for achieving rated 100 mA performance at high ambient temperatures.
NCV612SQ18T2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- 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):
- 0.56V @ 100mA
- Current - Output:
- 100mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- 90 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-88A (SC-70-5/SOT-353)
NCV612SQ18T2G FAQ
1.How can I place an order for NCV612SQ18T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV612SQ18T2G 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 NCV612SQ18T2G reliable?
The price and inventory of NCV612SQ18T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV612SQ18T2G is usually 5 days.
3.What payment methods are accepted for NCV612SQ18T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV612SQ18T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV612SQ18T2G?
NCV612SQ18T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV612SQ18T2G 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 NCV612SQ18T2G?
For technical support, including NCV612SQ18T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV612SQ18T2G requirements.
6.How does Aetrix verify that NCV612SQ18T2G is sourced from the original manufacturer or authorized distributors?
All NCV612SQ18T2G 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 NCV612SQ18T2G meets industry standards.
7.What is the process for return or replacement of NCV612SQ18T2G?
All NCV612SQ18T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV612SQ18T2G, 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 NCV612SQ18T2G part is unused and in its original packaging.
Return procedure for NCV612SQ18T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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