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onsemi NCV8705MW18TCG
- Part No.:
- NCV8705MW18TCG
- Manufacturer:
- onsemi
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
NCV8705MW18TCG.pdf
- Description:
- IC REG LINEAR 1.8V 500MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,940
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Product details
Overview
NCV8705MW18TCG from onsemi is an automotive-grade ultra-low-noise, ultra-low-quiescent-current LDO regulator delivering 500 mA output with 230 mV typical dropout at full load, 12 µVRMS output noise (100 Hz–100 kHz), and ±2% output accuracy across load/line/temperature - designed for powering RF receivers, imaging sensors, and audio processors in ADAS and infotainment systems.
For engineers reviewing the NCV8705MW18TCG datasheet, pinout, applications, or equivalent options, this page provides verified package mapping (WDFN6 2×2 mm), validated fixed 1.8 V output configuration, confirmed AEC-Q100 qualification, and real-world transient performance data for automotive power-rail design.
Technical Context
The NCV8705MW18TCG integrates an adaptive ground current circuit that reduces quiescent current to 13 µA at light load while maintaining regulation, and features internal soft-start to limit inrush current during enable. Its bandgap reference (0.8 V) and precision error amplifier enable tight output voltage control.
It employs a PMOS pass transistor architecture enabling low dropout and high PSRR (71 dB @ 1 kHz), with active output discharge for fast turn-off and thermal shutdown + current limiting for robust fault protection. The device operates stably with only a 1 µF ceramic output capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V - eliminates external feedback resistors and simplifies layout for noise-sensitive digital cores. |
| Max Output Current | 500 mA - sufficient to power multi-core microcontrollers or sensor signal chains without derating. |
| Quiescent Current | Typ. 13 µA - enables >10-year battery life in always-on automotive modules (e.g., telematics wake-up circuits). |
| Output Noise | 12 µVRMS (100 Hz–100 kHz) - meets stringent requirements of high-resolution ADCs and RF front-ends without bypass cap. |
| Dropout Voltage | 230 mV @ 500 mA - supports operation down to VIN = 2.03 V while regulating 1.8 V, critical for cold-crank scenarios. |
| PSRR | 71 dB @ 1 kHz - suppresses switching noise from upstream DC-DC converters feeding noisy 3.3 V rails. |
| Accuracy | ±2% over −40°C to +125°C - ensures reliable logic-level compliance for 1.8 V I/O interfaces across automotive temperature range. |
Pinout & Package
NCV8705MW18TCG is housed in a wettable flank WDFN6 2×2 mm package (Case 511BR), optimized for automated optical inspection (AOI) and thermal performance via exposed thermal pad soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output | Delivers stable 1.8 V; requires ≥1 µF X7R/X5R ceramic capacitor placed adjacent to pin for stability. |
| 2 - N/C | No-connect | Internally unconnected; may be tied to GND to enhance thermal dissipation without electrical impact. |
| 3 - GND | Power ground | Must connect exposed thermal pad to PCB ground plane for effective heat transfer and EMI reduction. |
| 4 - EN | Enable control | Logic-high (>0.9 V) enables regulation; <0.4 V disables output and activates active discharge. |
| 5 - N/C | No-connect | Internally unconnected; tie to GND if used for thermal improvement (no electrical function). |
| 6 - IN | Input supply | Accepts 2.5–5.5 V input; requires ≥1 µF ceramic decoupling capacitor close to pin to suppress trace inductance effects. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise (12 µVRMS) | Enables direct powering of high-SNR analog front-ends without noise-bypass capacitors - reducing BOM count and board area. |
| Adaptive ground current | Maintains 13 µA IQ at no-load while scaling intelligently with output current - ideal for duty-cycled automotive sensors. |
| Active output discharge | Forces rapid VOUT decay (<1 ms) upon disable, preventing floating states in downstream logic during power sequencing. |
| AEC-Q100 Grade 1 qualified | Rated for −40°C to +125°C junction temperature - certified for under-hood and instrument cluster applications. |
| Stable with 1 µF ceramic COUT | Eliminates need for large or specialized capacitors - lowers cost and improves reliability vs. tantalum-based alternatives. |
Applications
| ADAS Camera Module Power | Infotainment SoC Core Rail |
|---|---|
Use Scenario: Powers image signal processor (ISP) and high-speed MIPI interface in rear-view camera module. IC Role / Device Role / Timing Role: Low-noise 1.8 V supply for ISP analog blocks and MIPI PHY reference clock domain. Use Value: 12 µVRMS noise prevents spurious patterns in low-light video; 230 mV dropout sustains operation during 2.0 V cold-crank transients. |
Use Scenario: Supplies 1.8 V core voltage to application processor in automotive head unit. IC Role / Device Role / Timing Role: Primary LDO for SoC core logic, enabled/synchronized via system PMIC's enable signal. Use Value: ±2% accuracy ensures reliable CPU operation across temperature; 13 µA IQ extends battery backup time during ignition-off state. |
| Telematics GNSS Receiver | Instrument Cluster Display Driver |
Use Scenario: Provides clean 1.8 V bias to GNSS RF front-end and baseband ADC in cellular/V2X telematics unit. IC Role / Device Role / Timing Role: Dedicated low-noise LDO isolating GNSS analog section from noisy digital domains. Use Value: 71 dB PSRR at 1 kHz rejects switching noise from 3.3 V buck converter; AEC-Q100 ensures field reliability. |
Use Scenario: Supplies 1.8 V to TFT-LCD source driver IC in digital instrument cluster. IC Role / Device Role / Timing Role: Stable voltage reference for display gamma correction and timing controller logic. Use Value: Fast load transient response (<±120 mV) maintains display integrity during backlight PWM transitions; wettable flank package enables AOI verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0518PDBVR | Lower IQ (250 nA), lower max current (200 mA), same 1.8 V fixed output, SOT-23-5 package | Suitable for ultra-low-power microcontrollers but insufficient for 500 mA loads like SoCs or drivers | Select only for sub-200 mA applications where nanoscale IQ dominates design priority. |
| NCP1117ST18T3G | Higher IQ (6 mA), higher dropout (1.1 V @ 800 mA), TO-220/SOT-223, no AEC-Q100 or active discharge | Industrial-grade only; lacks automotive qualification, noise performance, and fast turn-off capability | Use only in non-automotive, cost-sensitive designs where thermal mass compensates for higher dropout. |
Compared with TPS7A0518PDBVR and NCP1117ST18T3G, the NCV8705MW18TCG uniquely combines automotive qualification, 500 mA capability, ultra-low noise, and active discharge - making it the sole fit for safety-critical, noise-sensitive 1.8 V rails in modern vehicle ECUs.
Availability
NCV8705MW18TCG is available at Aetrix Electronics and suitable for ADAS camera modules, infotainment SoC core supplies, and telematics GNSS receivers requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for NCV8705MW18TCG 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 leader focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications, with deep expertise in power management and analog solutions.
The NCV8705 series was engineered specifically for automotive power integrity - targeting noise-sensitive subsystems like ADAS, infotainment, and telematics where ultra-low noise, AEC-Q100 reliability, and low IQ are mandatory.
FAQ
What is the output voltage tolerance of the NCV8705MW18TCG over temperature and load?
The NCV8705MW18TCG maintains ±2% output voltage accuracy across −40°C to +125°C junction temperature, full 0–500 mA load range, and input voltage from VOUT + 0.5 V to 5.5 V. This is guaranteed by onsemi's production testing and confirmed in Table 4 of the datasheet, ensuring reliable 1.8 V logic-level compliance in automotive environments.
Does the NCV8705MW18TCG require an external noise-bypass capacitor?
No, the NCV8705MW18TCG achieves 12 µVRMS output noise (100 Hz–100 kHz) without any external noise-bypass capacitor. Its internal architecture eliminates the need for a dedicated 10 nF–100 nF capacitor on the ADJ pin - unlike many competing LDOs - simplifying layout and reducing BOM cost.
What package type and dimensions does the NCV8705MW18TCG use?
The NCV8705MW18TCG uses the WDFN6 2×2 mm wettable flank package (Case 511BR), with 0.5 mm pitch and exposed thermal pad. This package supports automated optical inspection (AOI) and delivers 30°C/W junction-to-board thermal resistance when properly soldered to a 1 oz copper plane.
How does the enable (EN) pin function on the NCV8705MW18TCG?
The EN pin on the NCV8705MW18TCG provides logic-controlled on/off functionality: voltage >0.9 V enables regulation and disables active discharge; voltage <0.4 V disables output and activates active discharge. An internal 110 nA pull-down ensures safe default-off state when EN is floating.
Is the NCV8705MW18TCG qualified for automotive applications?
Yes, the NCV8705MW18TCG carries the NCV prefix indicating automotive qualification: it is AEC-Q100 Grade 1 certified (−40°C to +125°C), PPAP-capable, and manufactured in onsemi's IATF 16949-certified facilities - meeting strict automotive reliability and traceability requirements.
NCV8705MW18TCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 25 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Soft Start, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
NCV8705MW18TCG FAQ
1.How can I place an order for NCV8705MW18TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8705MW18TCG 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 NCV8705MW18TCG reliable?
The price and inventory of NCV8705MW18TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8705MW18TCG is usually 5 days.
3.What payment methods are accepted for NCV8705MW18TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8705MW18TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8705MW18TCG?
NCV8705MW18TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8705MW18TCG 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 NCV8705MW18TCG?
For technical support, including NCV8705MW18TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8705MW18TCG requirements.
6.How does Aetrix verify that NCV8705MW18TCG is sourced from the original manufacturer or authorized distributors?
All NCV8705MW18TCG 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 NCV8705MW18TCG meets industry standards.
7.What is the process for return or replacement of NCV8705MW18TCG?
All NCV8705MW18TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCV8705MW18TCG, 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 NCV8705MW18TCG part is unused and in its original packaging.
Return procedure for NCV8705MW18TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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