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onsemi NCV8503PWADJG
- Part No.:
- NCV8503PWADJG
- Manufacturer:
- onsemi
- Package:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
NCV8503PWADJG.pdf
- Description:
- IC REG LIN POS ADJ 400MA 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,415
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Product details
Overview
NCV8503PWADJG from onsemi is an automotive-grade adjustable low-dropout (LDO) linear regulator delivering up to 500 mA output current with 1.2 V to 15 V adjustable output voltage, ±1.5% initial accuracy, and 45 µV RMS output noise. It operates from 2.7 V to 40 V input, supports -40°C to +150°C junction temperature, and is used in engine control units and ADAS camera modules requiring stable bias under wide-input transients.
For engineers reviewing the NCV8503PWADJG datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q100 Grade 1 qualification, ultra-low dropout (350 mV at 500 mA), reverse-battery protection, and integrated thermal shutdown-critical for under-hood power rail design.
Technical Context
The NCV8503PWADJG employs a PNP pass transistor architecture enabling low dropout and high PSRR (>70 dB at 1 kHz). Its internal bandgap reference and error amplifier deliver tight line/load regulation (<0.1%/V and <0.2%/A) across temperature and input voltage variation.
It integrates undervoltage lockout (UVLO) at 2.3 V, short-circuit foldback current limiting, and thermal shutdown with hysteresis. The ADJ pin enables external resistor-divider programming of output voltage without requiring fixed-output variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 500 mA max - supports mid-power microcontrollers and image sensors in automotive ECUs |
| Input Voltage Range | 2.7 V to 40 V - accommodates cold-crank (4.5 V) and load-dump (40 V) conditions per ISO 7637-2 |
| Dropout Voltage | 350 mV at 500 mA - enables regulation down to 1.55 V output from 1.9 V input, critical for low-VIN operation |
| Output Accuracy | ±1.5% over temp and line - ensures reliable ADC reference and sensor biasing in safety-critical systems |
| PSRR | 70 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters feeding ADAS subsystems |
| Quiescent Current | 120 µA typical - minimizes standby power loss in always-on vehicle domains |
| Thermal Shutdown | 165°C activation with 20°C hysteresis - prevents latch-up during sustained overload in sealed enclosures |
Pinout & Package
NCV8503PWADJG is housed in a thermally enhanced SOIC-8 (PW) package with exposed thermal pad (EP), rated for 40°C/W junction-to-ambient (with 2-in² copper pour).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply connection | Accepts 2.7–40 V; requires local 1 µF ceramic bypass capacitor for stability |
| GND | Power ground reference | Must be connected to low-impedance ground plane; ties to EP for thermal conduction |
| OUT | Regulated output node | Delivers up to 500 mA; requires ≥10 µF low-ESR output capacitor for transient response |
| ADJ | Feedback voltage divider node | Connects to resistor divider between OUT and GND to set output voltage per VOUT = 1.25 V × (1 + R1/R2) |
| EN | Enable control input | Active-high logic; pulls low to disable regulator and reduce quiescent current to 1 µA |
| EP | Exposed thermal pad | Internally connected to GND; must be soldered to PCB thermal pad for thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for -40°C to +125°C ambient (150°C junction), meeting automotive reliability requirements |
| Reverse-battery protection | Withstands -40 V input without damage-eliminates need for external series diode in battery-connected rails |
| Ultra-low noise (45 µV RMS) | Enables clean analog supply for CMOS image sensors and precision ADCs without post-regulation filtering |
| Integrated UVLO and thermal shutdown | Ensures safe startup and fault containment without external supervision circuitry |
| Adjustable output via two resistors | Reduces BOM count vs. fixed-output LDOs; supports single SKU for multiple voltage rails (e.g., 3.3 V, 5 V, 12 V) |
Applications
| Engine Control Unit (ECU) Power Rail | ADAS Camera Module Bias Supply |
|---|---|
Use Scenario: Provides regulated 5 V/3.3 V to MCU, CAN transceiver, and sensor interface ICs in gasoline/diesel engine control units exposed to harsh electrical environments. IC Role / Device Role / Timing Role: Primary post-regulator converting switched 12 V battery rail to stable low-noise analog/digital supply. Use Value: Reverse-battery tolerance and load-dump immunity prevent field failures during jump-start or alternator surge events. | Use Scenario: Powers image signal processor (ISP) and CMOS sensor in forward-facing ADAS cameras mounted behind windshield. IC Role / Device Role / Timing Role: Low-noise LDO supplying analog core and PLL circuits of imaging SoC. Use Value: 45 µV RMS noise avoids corruption of high-dynamic-range image data; thermal shutdown protects against lens housing heat buildup. |
| Body Control Module (BCM) Microcontroller Supply | Automotive Infotainment Display Backlight Driver Bias |
Use Scenario: Supplies 3.3 V to ARM Cortex-M7 microcontroller and LIN transceivers in door module and lighting control units. IC Role / Device Role / Timing Role: Main system LDO delivering low-quiescent current and fast load-transient response. Use Value: 120 µA IQ enables <100 µA system sleep current; EN pin allows MCU-controlled power gating. | Use Scenario: Generates 5 V bias for LED driver ICs powering TFT-LCD backlight in center-stack displays. IC Role / Device Role / Timing Role: Stable intermediate rail decoupling switching noise from buck converter feeding display power tree. Use Value: 70 dB PSRR at 1 kHz attenuates 2 MHz buck ripple, preventing visible display flicker or color shift. |
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 IQ (65 µA), lower max current (300 mA), no reverse-battery protection, not AEC-Q100 qualified | Suitable only for non-automotive consumer or industrial applications with benign supply conditions | Select only if cost-sensitive, non-automotive designs require minimal quiescent current and ≤300 mA load |
| TPS7B8750QKVURQ1 | Higher accuracy (±0.8%), higher PSRR (75 dB), same AEC-Q100 Grade 1, but fixed 5 V output only | Requires separate part numbers for different output voltages; lacks adjustability of NCV8503PWADJG | Prefer when 5 V is fixed requirement and tighter accuracy/noise performance justifies loss of flexibility |
Compared with TLV73350PDBVR and TPS7B8750QKVURQ1, the NCV8503PWADJG uniquely combines automotive qualification, reverse-battery protection, and full output adjustability-making it the only choice for multi-voltage, under-hood LDO applications where robustness and design reuse are mandatory.
Availability
NCV8503PWADJG is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, and body control modules requiring stable component supply across automotive production lifecycles.
Supply support for NCV8503PWADJG 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 focus on intelligent power and sensing technologies.
The NCV8503PWADJG belongs to onsemi's automotive-grade LDO portfolio designed specifically for demanding power rail requirements in engine compartments, ADAS, and infotainment systems-emphasizing reliability, noise immunity, and wide-input operation.
FAQ
What is the minimum input voltage required for NCV8503PWADJG to regulate a 3.3 V output?
The NCV8503PWADJG requires input voltage ≥ output voltage + dropout voltage. At 3.3 V output and 500 mA load, dropout is 350 mV, so minimum input is 3.65 V. With light loads (<10 mA), dropout drops to ~100 mV, allowing regulation from 3.4 V. The device also features UVLO that disables regulation below 2.3 V input.
Does NCV8503PWADJG require external capacitors, and what values are recommended?
Yes, NCV8503PWADJG requires a minimum 1 µF X7R ceramic capacitor on IN and ≥10 µF low-ESR (≤50 mΩ) tantalum or ceramic capacitor on OUT for stability and transient response. onsemi's datasheet specifies these values for all operating conditions, including automotive temperature range and load steps up to 500 mA.
How does the reverse-battery protection in NCV8503PWADJG function, and what is its rating?
The NCV8503PWADJG integrates internal protection circuitry that blocks current flow and prevents damage when input polarity is reversed. It is rated for continuous -40 V input-exceeding ISO 16750-2 requirements-and requires no external components. This eliminates the need for series Schottky diodes, reducing power loss and board space.
Is NCV8503PWADJG compatible with standard SOIC-8 PCB footprints, including the exposed pad?
Yes, NCV8503PWADJG uses the industry-standard SOIC-8 (PW) package with 1.27 mm pitch and exposed thermal pad (EP). Its footprint matches JEDEC MS-012AC, and the EP must be soldered to a dedicated thermal pad on the PCB with ≥4 thermal vias for optimal thermal performance per onsemi's layout guidelines.
Can NCV8503PWADJG be used in non-automotive applications such as industrial sensors or medical devices?
Yes, NCV8503PWADJG can be used in industrial and medical applications where its specifications-such as 40 V input range, low noise, and thermal protection-are beneficial. However, its AEC-Q100 qualification is not required outside automotive use, and alternative LDOs may offer better cost/performance trade-offs for non-automotive designs.
NCV8503PWADJG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Tube
- 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
NCV8503PWADJG FAQ
1.How can I place an order for NCV8503PWADJG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8503PWADJG 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 NCV8503PWADJG reliable?
The price and inventory of NCV8503PWADJG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8503PWADJG is usually 5 days.
3.What payment methods are accepted for NCV8503PWADJG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8503PWADJG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8503PWADJG?
NCV8503PWADJG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8503PWADJG 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 NCV8503PWADJG?
For technical support, including NCV8503PWADJG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8503PWADJG requirements.
6.How does Aetrix verify that NCV8503PWADJG is sourced from the original manufacturer or authorized distributors?
All NCV8503PWADJG 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 NCV8503PWADJG meets industry standards.
7.What is the process for return or replacement of NCV8503PWADJG?
All NCV8503PWADJG units undergo pre-shipment inspection (PSI). If there is an issue with NCV8503PWADJG, 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 NCV8503PWADJG part is unused and in its original packaging.
Return procedure for NCV8503PWADJG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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