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onsemi NCV8518PDG
- Part No.:
- NCV8518PDG
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
NCV8518PDG.pdf
- Description:
- IC REG LINEAR 5V 250MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,153
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Product details
Overview
NCV8518PDG from onsemi is an automotive-grade 5.0 V low-dropout linear regulator with integrated watchdog timer, wake-up signal generator, RESET output, and ENABLE control. It delivers up to 250 mA output current, maintains ±2% output voltage accuracy over −40°C to +150°C, and withstands 45 V input transients - designed for microprocessor power and supervision in tire pressure monitoring systems.
For engineers reviewing the NCV8518PDG datasheet, pinout, applications, or equivalent options, this device serves as a single-chip solution for battery-powered automotive subsystems requiring precise voltage regulation, fault detection, sleep-mode management, and AEC-Q100-compliant reliability.
Technical Context
The NCV8518PDG integrates a precision LDO pass element with micropower biasing (100 µA quiescent current), thermal shutdown, and short-circuit protection. Its watchdog monitors falling edges on WDI, while RESET asserts low when VOUT drops >7% or watchdog timing expires.
Wake-up generation uses an external RDELAY resistor to set period (18–208 ms), duty cycle (~50%), and RESET delay (2–25 ms); the Delay pin provides a buffered ~1.25 V reference for external tracking circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2% - ensures stable MCU core/peripheral supply across temperature and load. |
| Max Output Current | 250 mA - supports mid-power automotive MCUs and sensors without external boost. |
| Dropout Voltage | 425 mV typical at 150 mA - enables operation down to VIN = 5.425 V, critical during cold-crank conditions. |
| Quiescent Current | 100 µA typical - extends battery life in always-on TPMS nodes; <1.0 µA in shutdown mode. |
| Input Voltage Range | −0.3 V to 45 V - survives load-dump transients per ISO 7637-2 without external clamping. |
| RESET Threshold | 4.65 V nominal - triggers reset before MCU brown-out, with programmable delay via RDELAY. |
| Operating Junction Temp | −40°C to +150°C - qualified for under-hood automotive placement per AEC-Q100 Grade 1. |
Pinout & Package
NCV8518PDG is housed in an SOIC-8 Exposed Pad package (Case 751AC), with the exposed pad thermally connected to PCB ground for enhanced thermal dissipation (θJA = 80°C/W on 1 sq. inch copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Input supply | Accepts −0.3 V to 45 V; handles automotive transients without external protection. |
| 2 GND | Ground reference | Common return for regulator, logic, and thermal pad; must be low-impedance. |
| 3 Delay | Timing reference output | Buffered ~1.25 V bandgap voltage used to set RESET, watchdog, and wake-up timing via RDELAY. |
| 4 ENABLE | Logic-level enable input | CMOS/TTL-compatible; high = active regulation, low = shutdown (<1 µA IQ). |
| 5 WDI | Watchdog input | Monitors falling edge of MCU-generated pulse; absence triggers RESET after one wake-up cycle. |
| 6 RESET | Open-drain reset output | Active-low signal asserted during power-up, brown-out, watchdog timeout, or UVLO. |
| 7 Wake Up | Periodic interrupt output | 5 V square wave (50% duty) wakes MCU from sleep; frequency set by RDELAY (18–208 ms). |
| 8 VOUT | Regulated output | 5.0 V ±2% supply for MCU, sensors, or RF ICs; stable under 250 mA load and line/load transients. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated watchdog + wake-up generator | Eliminates need for external timing ICs; reduces BOM count and PCB area in TPMS and remote sensors. |
| Programmable RESET delay & wake-up period | Single RDELAY resistor sets all three timing functions - simplifies design validation and field tuning. |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient (150°C junction), PPAP-capable - meets automotive production requirements. |
| Thermal shutdown + short-circuit protection | Self-protecting under overload or ambient overheating; no external components required for safety compliance. |
| Pb-free SOIC-8 EP package | RoHS-compliant with exposed thermal pad - improves thermal performance and supports automated reflow assembly. |
Applications
| Tire Pressure Monitoring System (TPMS) | Automotive Body Control Module (BCM) Subnode |
|---|---|
Use Scenario: Battery-powered sensor node mounted inside vehicle tire, transmitting pressure/temperature data wirelessly. IC Role / Device Role / Timing Role: Primary 5 V power regulator and MCU supervisor - provides regulated VDD, generates periodic wake-up pulses, validates MCU health via watchdog, and asserts RESET on brown-out or communication failure. Use Value: Enables 10+ year battery life via <1 µA shutdown current and micropower operation; withstands 45 V transients during vehicle jump-starts. |
Use Scenario: Low-power door module controlling window lift, mirror fold, or interior lighting with CAN/LIN interface. IC Role / Device Role / Timing Role: Local power and reset manager - powers MCU and peripherals, sequences startup via POR delay, and forces safe reset if MCU hangs or watchdog fails. Use Value: Reduces system-level fault recovery time by integrating RESET timing and wake-up into single chip - eliminates discrete RC networks and logic gates. |
| Engine Bay Sensor Interface | Industrial Battery-Powered Data Logger |
Use Scenario: Temperature/humidity sensor near engine block, operating continuously in high-temperature environment. IC Role / Device Role / Timing Role: High-temp LDO + supervisor - regulates 5 V rail for analog front-end and MCU, monitors thermal margin via junction temp sensing, and initiates graceful shutdown before TSD activation. Use Value: Sustains operation up to 150°C junction temperature with guaranteed regulation and protection - avoids premature shutdown during transient hot-soak conditions. |
Use Scenario: Remote environmental monitor powered by Li-SOCl₂ battery, sampling data every 15 minutes and transmitting via LoRaWAN. IC Role / Device Role / Timing Role: Ultra-low-IQ power manager - supplies MCU only during active measurement windows, uses wake-up signal to trigger ADC acquisition, and resets system on memory corruption. Use Value: Achieves >15-year battery life via 100 µA operating IQ and sub-µA shutdown - validated across industrial temperature range (−40°C to +85°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive LDO-with-supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV70750PDBVR | 5.0 V fixed LDO only (no watchdog, wake-up, or RESET); 300 mA output; 25 µA IQ; not AEC-Q100 qualified. | Lacks integrated supervision functions - requires external watchdog IC and reset generator for MCU safety. | Choose for cost-sensitive non-automotive applications where supervision is handled elsewhere. |
| MAX16910ATA/V+T | 5.0 V automotive LDO with RESET and ENABLE, but no watchdog or wake-up; 250 mA; AEC-Q100 Grade 2; higher IQ (40 µA). | Missing wake-up generator - cannot autonomously wake MCU from deep sleep without host processor involvement. | Choose when watchdog/wake-up are unnecessary and Grade 2 temp range suffices. |
Compared with TLV70750PDBVR and MAX16910ATA/V+T, the NCV8518PDG uniquely combines AEC-Q100 Grade 1 qualification, integrated watchdog + wake-up + RESET, and 45 V transient tolerance - making it the only single-chip solution for automotive TPMS and body electronics requiring autonomous fault recovery and ultra-low-power sleep management.
Availability
NCV8518PDG is available at Aetrix Electronics and suitable for tire pressure monitoring systems, automotive body electronics, and industrial battery-powered data loggers requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant reliability.
Supply support for NCV8518PDG 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 (Nasdaq: ON) is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV8518PDG belongs to onsemi's automotive power management portfolio, engineered specifically for microprocessor supervision in harsh-environment battery-powered systems - emphasizing functional safety, transient robustness, and ultra-low quiescent current.
FAQ
What is the maximum input voltage the NCV8518PDG can withstand without damage?
The NCV8518PDG supports an absolute maximum input voltage of 45 V on the VIN pin, enabling reliable operation during automotive load-dump events per ISO 7637-2. This rating applies across the full operating temperature range and does not require external TVS diodes for transient suppression in most vehicle architectures.
How does the NCV8518PDG generate its wake-up signal, and what determines its frequency?
The NCV8518PDG generates a periodic 5 V square-wave wake-up signal using an internal oscillator referenced to the Delay pin voltage (~1.25 V). The wake-up period is set solely by an external resistor RDELAY connected between Delay and GND, with values from 60 kΩ to 500 kΩ yielding periods from 18 ms to 208 ms - confirmed in Figure 11 of the datasheet.
Does the NCV8518PDG provide a reset signal during power-up, and how long is the delay?
Yes, the NCV8518PDG asserts an active-low RESET signal during power-up until VOUT reaches regulation. The power-on reset (POR) delay is programmable via RDELAY: 2.0–4.0 ms for 60 kΩ, 5.6–6.4 ms for 120 kΩ, and up to 25 ms for 500 kΩ - as specified in the Electrical Characteristics table on page 5.
What protection features are built into the NCV8518PDG, and are external components required?
The NCV8518PDG includes thermal shutdown (triggering at 150°C junction), short-circuit current limiting (255–400 mA), and input overvoltage tolerance (45 V). All protections are fully internal - no external resistors, capacitors, or diodes are needed to activate or configure them, simplifying layout and improving system reliability.
Is the NCV8518PDG pin-compatible with other variants in the NCV8518 family, such as NCV8518PDR2G?
No, the NCV8518PDG (SOIC-8 EP) is not pin-compatible with the NCV8518PDR2G (SOIC-16 EP). Pin counts, pin assignments, and package footprints differ significantly - e.g., SOIC-8 has 8 pins including Wake Up and Delay, while SOIC-16 dedicates pins to NC and splits functionality across more terminals. PCB layout must be redesigned for each variant.
NCV8518PDG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.75V @ 150mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Reset, Wake-Up, Watchdog
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
NCV8518PDG FAQ
1.How can I place an order for NCV8518PDG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8518PDG 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 NCV8518PDG reliable?
The price and inventory of NCV8518PDG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8518PDG is usually 5 days.
3.What payment methods are accepted for NCV8518PDG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8518PDG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8518PDG?
NCV8518PDG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8518PDG 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 NCV8518PDG?
For technical support, including NCV8518PDG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8518PDG requirements.
6.How does Aetrix verify that NCV8518PDG is sourced from the original manufacturer or authorized distributors?
All NCV8518PDG 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 NCV8518PDG meets industry standards.
7.What is the process for return or replacement of NCV8518PDG?
All NCV8518PDG units undergo pre-shipment inspection (PSI). If there is an issue with NCV8518PDG, 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 NCV8518PDG part is unused and in its original packaging.
Return procedure for NCV8518PDG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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