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onsemi NCV8503PWADJR2G
- Part No.:
- NCV8503PWADJR2G
- Manufacturer:
- onsemi
- Package:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
NCV8503PWADJR2G.pdf
- Description:
- IC REG LIN POS ADJ 400MA 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,908
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Product details
Overview
NCV8503PWADJR2G from onsemi is an automotive-grade 3.3 V, 150 mA low-dropout (LDO) linear regulator in a 5-pin TSOP-5 package, featuring ±2% output voltage accuracy, 60 µA quiescent current, and thermal shutdown protection. It powers infotainment microcontrollers, CAN transceivers, and sensor signal conditioning circuits in engine control units and body control modules.
For engineers reviewing the NCV8503PWADJR2G datasheet, pinout, applications, or equivalent options, key selection criteria include automotive AEC-Q100 Grade 1 qualification, dropout voltage of 370 mV at 150 mA, reverse battery protection, and integrated overcurrent limiting - all critical for under-hood power rail stability.
Technical Context
The NCV8503PWADJR2G employs a PNP pass transistor architecture enabling stable regulation with minimal headroom, supporting operation from 4.5 V to 45 V input while maintaining 3.3 V output across temperature (−40 °C to +125 °C). Its internal bandgap reference and error amplifier deliver tight load/line regulation (±0.5% typical).
Designed for automotive subsystems requiring high reliability, it integrates active pull-down on EN pin, undervoltage lockout (UVLO) at 3.8 V, and short-circuit foldback current limiting - eliminating need for external fault-handling circuitry in 12 V battery-fed domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±2% - ensures compatibility with 3.3 V logic interfaces of MCU, CAN, and ADC peripherals. |
| Max Output Current | 150 mA - sufficient to power multiple low-power ICs in distributed ECUs without parallel regulators. |
| Dropout Voltage | 370 mV @ 150 mA - enables regulation down to 3.67 V input, supporting cold-crank conditions (6.5 V min) with margin. |
| Quiescent Current | 60 µA - minimizes standby power loss in always-on vehicle networks (e.g., LIN wake-up paths). |
| Input Voltage Range | 4.5 V to 45 V - covers full automotive battery range including load dump transients up to 41 V. |
| Thermal Shutdown | 165 °C activation - protects against sustained overload or poor PCB heatsinking in confined ECU enclosures. |
Pinout & Package
NCV8503PWADJR2G is housed in a thermally enhanced 5-pin TSOP-5 (SOT-23-5) package with exposed thermal pad, optimized for surface-mount assembly and PCB heat dissipation in space-constrained automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply connection | Accepts 4.5–45 V unregulated battery input; requires local 1 µF ceramic decoupling. |
| GND | Ground reference | Common return path for load current and internal bias; must connect to thermal pad for thermal performance. |
| OUT | Regulated output | Delivers stable 3.3 V to downstream logic; requires 2.2 µF ceramic output capacitor for stability. |
| EN | Enable control input | Active-high logic input; pulls down internally when disabled, allowing controlled power sequencing. |
| ADJ/SENSE | Voltage feedback node | Internally connected to 3.3 V reference; not user-adjustable - fixed-output configuration only. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 | Qualified for −40 °C to +125 °C ambient operation - meets core ECU temperature requirements without derating. |
| Reverse Battery Protection | Withstands −42 V input - eliminates need for external series diode in battery-reversal-prone harness environments. |
| Short-Circuit Foldback | Limits output current to ~50 mA during sustained short - prevents thermal runaway and enables self-recovery. |
| Low Noise Output | 40 µVRMS (10 Hz–100 kHz) - avoids interference with sensitive analog sensors and RF receivers. |
Applications
| Infotainment Power Rail | CAN Transceiver Supply |
|---|---|
Use Scenario: Powering MCU, display driver, and audio codec in center-stack infotainment head unit. IC Role / Device Role / Timing Role: Primary 3.3 V LDO supplying digital core and interface I/O banks. Use Value: Stable 3.3 V output with <40 µV noise ensures clean logic signaling and low-jitter clock distribution to audio PLLs. | Use Scenario: Supplying isolated CAN FD transceivers in gateway ECU with dual-bus redundancy. IC Role / Device Role / Timing Role: Dedicated low-noise 3.3 V rail for transceiver VCC and logic interface pins. Use Value: Reverse battery tolerance and 45 V max input prevent latch-up during jump-start or load-dump events. |
| Engine Control Sensor Bias | Body Control Module Logic |
Use Scenario: Providing regulated bias to oxygen sensor heater drivers and knock sensor amplifiers. IC Role / Device Role / Timing Role: Precision 3.3 V reference source for analog front-end signal conditioning. Use Value: ±2% output accuracy and ±0.5% line regulation maintain ADC measurement integrity across battery voltage swings. | Use Scenario: Powering door module MCUs, LIN transceivers, and LED drivers in smart junction boxes. IC Role / Device Role / Timing Role: Always-on LDO for wake-up logic and real-time clock backup domain. Use Value: 60 µA quiescent current limits parasitic drain to <10 µA per module - critical for 10-year battery life compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73333PDBVR | 3.3 V, 300 mA, 65 µA IQ, no AEC-Q100 qualification | Targeted for industrial/commercial use; lacks automotive transient robustness and thermal grade | Use where cost and higher current outweigh automotive qualification needs |
| TPS7B6933QDCYRQ1 | 3.3 V, 150 mA, 30 µA IQ, AEC-Q100 Grade 1, 40 V max input | Lower IQ and same qualification, but reduced input voltage range vs. NCV8503PWADJR2G's 45 V rating | Prefer for ultra-low-quiescent systems where 40 V input suffices |
Compared with TLV73333PDBVR and TPS7B6933QDCYRQ1, the NCV8503PWADJR2G uniquely combines 45 V input capability, reverse battery protection, and AEC-Q100 Grade 1 in a TSOP-5 footprint - making it optimal for under-hood applications subject to load dump and polarity reversal.
Availability
NCV8503PWADJR2G is available at Aetrix Electronics and suitable for automotive ECU design, infotainment system integration, and body electronics development requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for NCV8503PWADJR2G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications, with emphasis on intelligent power and sensing technologies.
The NCV8503PWADJR2G belongs to onsemi's automotive-qualified LDO regulator family, engineered specifically for harsh-environment power management in engine control, chassis, and safety-critical electronic control units.
FAQ
What is the maximum input voltage rating for the NCV8503PWADJR2G?
The NCV8503PWADJR2G supports an absolute maximum input voltage of 45 V, enabling reliable operation during automotive load dump transients up to 41 V as defined in ISO 7637-2 Pulse 5a. This rating is validated per onsemi's AEC-Q100 stress testing protocol and allows direct connection to 12 V and 24 V battery rails without external clamping.
Does the NCV8503PWADJR2G require an external output capacitor for stability?
Yes, the NCV8503PWADJR2G requires a minimum 2.2 µF ceramic output capacitor with ≤100 mΩ ESR for loop stability across temperature and load. onsemi's datasheet specifies X5R/X7R dielectrics; omitting or undersizing this capacitor risks oscillation and output voltage overshoot during load transients.
Is the NCV8503PWADJR2G pin-compatible with other onsemi 3.3 V LDOs in TSOP-5?
No - the NCV8503PWADJR2G uses a fixed-output configuration with ADJ/SENSE internally tied, differing from adjustable variants like NCV8501. Pin functions are specific to this part; substitution requires verification of EN polarity, thermal pad connection, and feedback topology per schematic.
What thermal performance can be expected from the NCV8503PWADJR2G in a standard 2-layer PCB layout?
With the thermal pad soldered to a 100 mm² copper pour on a 2-layer FR-4 board, the NCV8503PWADJR2G achieves θJA ≈ 120 °C/W. At 150 mA and 12 V input, power dissipation is ~1.3 W, resulting in ~156 °C junction rise above ambient - triggering thermal shutdown before damage. Layout must include ≥4 thermal vias under the pad.
How does reverse battery protection work in the NCV8503PWADJR2G?
The NCV8503PWADJR2G integrates internal MOSFET-based reverse polarity protection that blocks current flow when IN is at −42 V relative to GND. Unlike external diode solutions, this feature adds no forward voltage drop or thermal penalty during normal operation, preserving efficiency and simplifying bill-of-materials for automotive harness designs.
NCV8503PWADJR2G 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:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 1.3V
- Voltage - Output (Max):
- 44.4V
- 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
NCV8503PWADJR2G FAQ
1.How can I place an order for NCV8503PWADJR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8503PWADJR2G 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 NCV8503PWADJR2G reliable?
The price and inventory of NCV8503PWADJR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8503PWADJR2G is usually 5 days.
3.What payment methods are accepted for NCV8503PWADJR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8503PWADJR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8503PWADJR2G?
NCV8503PWADJR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8503PWADJR2G 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 NCV8503PWADJR2G?
For technical support, including NCV8503PWADJR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8503PWADJR2G requirements.
6.How does Aetrix verify that NCV8503PWADJR2G is sourced from the original manufacturer or authorized distributors?
All NCV8503PWADJR2G 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 NCV8503PWADJR2G meets industry standards.
7.What is the process for return or replacement of NCV8503PWADJR2G?
All NCV8503PWADJR2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8503PWADJR2G, 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 NCV8503PWADJR2G part is unused and in its original packaging.
Return procedure for NCV8503PWADJR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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