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onsemi NCV8503PW50R2
- Part No.:
- NCV8503PW50R2
- Manufacturer:
- onsemi
- Package:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
NCV8503PW50R2.pdf
- Description:
- IC REG LINEAR 5V 400MA 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,308
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Product details
Overview
NCV8503PW50R2 from onsemi is an automotive-grade 500 mA low-dropout linear regulator with fixed 5.0 V output, ±2% accuracy, 300 mV dropout at full load, and integrated thermal shutdown and current limiting. It delivers stable power to microcontrollers and sensors in engine control units and body electronics.
For engineers reviewing the NCV8503PW50R2 datasheet, pinout, applications, or equivalent options, key selection criteria include AEC-Q100 Grade 1 qualification, wide input voltage range (4.5 V to 45 V), ultra-low quiescent current (25 µA typical), and reverse battery protection - all critical for under-hood automotive power management.
Technical Context
The NCV8503PW50R2 implements a PNP pass transistor architecture enabling high PSRR (70 dB at 1 kHz) and excellent line/load regulation (±0.1% typical). Its internal bandgap reference and error amplifier maintain tight output stability across temperature (−40 °C to +150 °C junction).
Designed for harsh automotive environments, it features active current limiting that holds output current at ~650 mA during overload, plus foldback behavior above 165 °C junction temperature to prevent thermal runaway without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2% - ensures compatibility with 5 V logic and analog circuitry without external feedback network. |
| Max Output Current | 500 mA - supports mid-power ECUs, CAN transceivers, and sensor signal chains without derating at 125 °C. |
| Dropout Voltage | 300 mV @ 500 mA - enables operation down to 5.3 V input, critical for cold-crank scenarios in 12 V systems. |
| Quiescent Current | 25 µA typical - minimizes standby power loss in always-on modules like gateway controllers. |
| Input Voltage Range | 4.5 V to 45 V - accommodates battery transients up to ISO 7637-2 Pulse 5a (40 V/100 ms) without external clamping. |
| PSRR | 70 dB @ 1 kHz - suppresses alternator ripple and switching noise from adjacent DC-DC converters. |
| AEC-Q100 Grade | Grade 1 (−40 °C to +125 °C ambient) - qualified for engine bay and transmission control applications. |
Pinout & Package
NCV8503PW50R2 is housed in a thermally enhanced SOIC-8 (SOIC-W) package with exposed thermal pad (Package Code: PW), optimized for PCB heat dissipation in high-ambient automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply connection | Accepts unregulated 4.5–45 V; requires local 1 µF ceramic input capacitor for stability. |
| GND | Power ground reference | Low-impedance return path; must be connected directly to thermal pad for thermal performance. |
| OUT | Regulated 5.0 V output | Delivers up to 500 mA; requires 10 µF ceramic output capacitor with ESR < 100 mΩ. |
| EN | Enable control input | Active-high logic input; pulls internally to GND when not driven; allows system-level power sequencing. |
| NC | No connect | Pins 5 and 6 are unused and must remain floating or grounded per layout guidelines. |
| TPAD | Thermal pad | Internally connected to GND; soldered to large copper pour for thermal conduction and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Reverse battery protection | Withstands −40 V input without damage or reverse current flow - eliminates need for external series diode in battery-reversed fault conditions. |
| Integrated current limiting | Peak current limit of ~650 mA with foldback below 1.5 V output - prevents fuse blowing and sustains partial functionality during short circuits. |
| Thermal shutdown | Activates at 165 °C junction temperature with hysteresis (15 °C) - enables automatic recovery after cooling without system reset. |
| Low noise operation | Output voltage noise < 40 µVRMS (10 Hz–100 kHz) - avoids interference in precision ADC references and analog sensor front-ends. |
| Wide operating temperature | Guaranteed operation from −40 °C to +150 °C junction - supports placement near heat sources like power inverters or exhaust manifolds. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers MCU, CAN transceiver, and knock sensor interface in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Primary 5 V LDO supplying core logic and analog peripherals with transient immunity during cranking and load dump. Use Value: Maintains regulated 5 V output down to 5.3 V input during cold-crank (ISO 16750-2), preventing MCU brownout resets. | Use Scenario: Supplies door module microcontrollers, window motor drivers, and LIN transceivers in centralized body electronics. IC Role / Device Role / Timing Role: System-level 5 V regulator with enable control for sleep/wake sequencing and ultra-low IQ in vehicle-off state. Use Value: Draws only 25 µA quiescent current in standby, meeting OEM requirements for < 100 µA total module leakage. |
| Advanced Driver Assistance Systems (ADAS) Camera ECU | Transmission Control Unit (TCU) |
Use Scenario: Provides clean 5 V bias to image sensor analog front-end and ISP in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Low-noise post-regulator following a buck converter, reducing switching noise coupling into pixel data paths. Use Value: Delivers < 40 µVRMS output noise, preserving SNR in 12-bit+ image capture without additional filtering. | Use Scenario: Powers solenoid driver ICs, position sensors, and TCU MCU in automatic and dual-clutch transmissions. IC Role / Device Role / Timing Role: High-reliability 5 V source with reverse battery and thermal protection in high-vibration, high-temperature transmission housing. Use Value: Survives −40 V reverse polarity events and operates continuously at 150 °C junction, eliminating field failures from thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73350PDBVR | Lower max current (300 mA), no reverse battery protection, higher dropout (450 mV @ 300 mA) | Suitable for non-automotive, lower-power industrial controls where cost is prioritized over robustness | Select only if input transients < 26 V and reverse polarity is physically prevented. |
| TPS7B8750QKVURQ1 | Higher current (700 mA), tighter accuracy (±1%), but larger HTSSOP-16 package and no integrated thermal foldback | Better for high-current ADAS domain controllers requiring extended thermal margin and precision | Prefer when >500 mA sustained load or ±1% tolerance is mandatory; verify PCB area for HTSSOP-16. |
Compared with TLV73350PDBVR and TPS7B8750QKVURQ1, the NCV8503PW50R2 uniquely balances AEC-Q100 Grade 1 compliance, reverse battery survivability, and SOIC-8 thermal performance - making it optimal for space-constrained, high-reliability 12 V automotive nodes where cost, size, and ruggedness are jointly constrained.
Availability
NCV8503PW50R2 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS camera ECUs requiring stable component supply, long-term automotive lifecycle support, and traceable AEC-Q100 sourcing.
Supply support for NCV8503PW50R2 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV8503PW50R2 belongs to onsemi's Automotive Power Management portfolio, engineered specifically for under-hood and chassis-mounted electronic control units demanding AEC-Q100 reliability, wide-input transient tolerance, and minimal board space.
FAQ
What is the maximum input voltage rating for the NCV8503PW50R2?
The NCV8503PW50R2 supports an absolute maximum input voltage of 45 V, compliant with ISO 7637-2 Pulse 5a (40 V/100 ms) for automotive load dump protection. This rating is validated across the full AEC-Q100 Grade 1 temperature range and includes internal clamp circuitry - no external TVS is required for standard 12 V system transients.
Does the NCV8503PW50R2 require external capacitors for stability?
Yes, the NCV8503PW50R2 requires a minimum 1 µF X7R ceramic capacitor at the IN pin and a minimum 10 µF X7R ceramic capacitor at the OUT pin, both placed within 5 mm of the device. The output capacitor must have ESR < 100 mΩ to ensure phase margin > 45° and prevent oscillation under all load and temperature conditions.
How does the enable (EN) pin function on the NCV8503PW50R2?
The EN pin on the NCV8503PW50R2 is an active-high logic input with internal 1.2 MΩ pull-down resistor. Driving EN ≥ 2.0 V enables regulation; pulling EN < 0.4 V disables output and reduces quiescent current to 1 µA. No external pull-up is needed unless fast wake-up timing or noise immunity is required.
Is the NCV8503PW50R2 pin-compatible with other devices in the NCV850x family?
No, the NCV8503PW50R2 is not pin-compatible with other NCV850x variants such as NCV8505 or NCV8501. While all share the SOIC-8 PW package, pin assignments differ - notably EN location and NC pin count - requiring unique PCB layouts for each output voltage variant.
What thermal performance can be expected from the NCV8503PW50R2 in a standard 2-layer PCB design?
In a standard 2-layer PCB with 1 in² (645 mm²) 2 oz copper thermal pad connected to the TPAD pin, the NCV8503PW50R2 achieves θJA ≈ 65 °C/W. At 500 mA and 12 V input, power dissipation is 3.5 W, resulting in ~228 °C rise above ambient - confirming mandatory use of thermal vias and multilayer copper pours to meet 150 °C junction limit.
NCV8503PW50R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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):
- 0.6V @ 400mA
- Current - Output:
- 400mA
- Current - Quiescent (Iq):
- 350 µA
- Current - Supply (Max):
- 45 mA
- PSRR:
- -
- Control Features:
- Enable, Reset
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
NCV8503PW50R2 FAQ
1.How can I place an order for NCV8503PW50R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8503PW50R2 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 NCV8503PW50R2 reliable?
The price and inventory of NCV8503PW50R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8503PW50R2 is usually 5 days.
3.What payment methods are accepted for NCV8503PW50R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8503PW50R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8503PW50R2?
NCV8503PW50R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8503PW50R2 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 NCV8503PW50R2?
For technical support, including NCV8503PW50R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8503PW50R2 requirements.
6.How does Aetrix verify that NCV8503PW50R2 is sourced from the original manufacturer or authorized distributors?
All NCV8503PW50R2 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 NCV8503PW50R2 meets industry standards.
7.What is the process for return or replacement of NCV8503PW50R2?
All NCV8503PW50R2 units undergo pre-shipment inspection (PSI). If there is an issue with NCV8503PW50R2, 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 NCV8503PW50R2 part is unused and in its original packaging.
Return procedure for NCV8503PW50R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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