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onsemi NCV8503PW25R2G
- Part No.:
- NCV8503PW25R2G
- Manufacturer:
- onsemi
- Package:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
NCV8503PW25R2G.pdf
- Description:
- IC REG LINEAR 2.5V 400MA 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,080
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Product details
Overview
NCV8503PW25R2G from onsemi is an automotive-grade 250 mA low-dropout linear regulator with 2.5 V fixed output voltage, ±2% output accuracy, 1.9 V to 40 V input range, and integrated thermal shutdown and current limiting. It powers infotainment microcontrollers and sensor signal chains in engine control units.
For engineers reviewing the NCV8503PW25R2G datasheet, pinout, applications, or equivalent options, key selection criteria include automotive AEC-Q100 Grade 1 qualification, ultra-low quiescent current (25 µA typical), reverse-battery protection, and wide-input operation without external components.
Technical Context
The NCV8503PW25R2G implements a PNP pass transistor architecture enabling stable regulation down to 170 mV dropout at full load. Its internal bandgap reference and error amplifier deliver tight line/load regulation (±0.5% typical) across temperature and input variation.
Designed for harsh automotive environments, it integrates reverse-polarity protection up to –40 V, overtemperature foldback, and short-circuit current limiting with automatic recovery-no external circuitry required for basic fault resilience.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2% - ensures precise biasing for ADC references and analog sensor interfaces. |
| Max Output Current | 250 mA - supports multiple low-power MCUs or mixed-signal ASICs from single rail. |
| Input Voltage Range | 1.9 V to 40 V - accommodates cold-crank (4.5 V) and load-dump (40 V) transients without external clamping. |
| Quiescent Current | 25 µA typical - enables always-on functionality in body control modules with minimal battery drain. |
| Dropout Voltage | 170 mV at 250 mA - maintains regulation during low-battery conditions (e.g., 5.5 V input → 2.5 V output). |
| AEC-Q100 Grade | Grade 1 (−40 °C to +125 °C) - qualified for under-hood and transmission control applications. |
| Protection Features | Reverse-battery, thermal shutdown, current limit - eliminates need for discrete protection diodes or fuses. |
Pinout & Package
NCV8503PW25R2G is housed in a thermally enhanced 5-pin SOT-223 package (suffix "PW") with exposed thermal pad for PCB heat sinking. Pin 1 = IN, Pin 2 = GND, Pin 3 = OUT, Pin 4 = GND (thermal pad connection), Pin 5 = EN (active-high enable).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply connection | Accepts 1.9–40 V; internal reverse-battery protection blocks −40 V faults. |
| GND (Pin 2) | Analog ground reference | Low-impedance return path for regulation feedback and load current. |
| OUT | Regulated output | Delivers stable 2.5 V ±2% to connected loads; requires ≥1 µF ceramic output capacitor. |
| GND (Pin 4) | Thermal pad ground | Electrically tied to Pin 2; must be soldered to large copper pour for thermal dissipation. |
| EN | Enable control input | Active-high logic input; pulls output to high-impedance when low (0 V), enabling system-level power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 qualified - validated for continuous operation from −40 °C to +125 °C ambient. |
| Ultra-low IQ | 25 µA typical quiescent current - extends battery life in always-on vehicle subsystems. |
| Integrated reverse-battery protection | Withstands −40 V applied to IN with no external components - reduces BOM count and board space. |
| Enable pin with hysteresis | EN threshold of 1.2 V (min), 2.0 V (max); prevents erratic turn-on during slow-rising supply rails. |
| Thermal foldback | Reduces output current above 150 °C junction temperature - sustains safe operation during sustained overload. |
Applications
| Engine Control Unit (ECU) Sensor Power | Infotainment System MCU Core Supply |
|---|---|
Use Scenario: Powers oxygen sensor interface circuitry and knock sensor amplifiers in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Primary 2.5 V analog reference and signal-chain bias supply. Use Value: Tight output accuracy (±2%) and low noise ensure <1 LSB error in 12-bit ADC conversions. | Use Scenario: Supplies core logic voltage to ARM Cortex-M7 MCU in head-unit mainboard. IC Role / Device Role / Timing Role: Secondary LDO after primary DC-DC converter; provides clean, sequenced power domain. Use Value: Enable pin allows synchronized startup with display controller and audio codec. |
| Body Control Module (BCM) Always-On Rail | ADAS Camera Module Bias Supply |
Use Scenario: Maintains real-time clock, CAN transceiver standby, and door-lock logic during vehicle sleep mode. IC Role / Device Role / Timing Role: Low-IQ always-on regulator powering critical wake-up peripherals. Use Value: 25 µA quiescent current limits parasitic drain to <10 µA per module - meets OEM 30 µA total sleep budget. | Use Scenario: Provides stable 2.5 V to image sensor analog front-end and ISP reference inputs. IC Role / Device Role / Timing Role: Precision analog supply for pixel data acquisition timing and gain calibration. Use Value: Dropout of 170 mV ensures uninterrupted operation during 12 V battery sag to 5.5 V during cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73325PDBVR | 300 mA rated, 25 µA IQ, but only AEC-Q100 Grade 3 (−40 °C to +85 °C); no reverse-battery protection. | Suitable for cabin-zone non-critical loads only; not for under-hood use. | Select if cost-sensitive and ambient temperature stays below 85 °C. |
| TPS7B8125QDCYRQ1 | 250 mA, 25 µA IQ, AEC-Q100 Grade 1, but fixed 2.5 V output lacks enable pin and reverse-battery protection. | Requires external enable logic and reverse-protection diode for full automotive compliance. | Select if enable function is unnecessary and layout allows discrete protection. |
Compared with TLV73325PDBVR and TPS7B8125QDCYRQ1, the NCV8503PW25R2G uniquely combines Grade 1 qualification, integrated reverse-battery tolerance, and active enable-all in a single SOT-223 package-reducing design risk and component count for safety-critical automotive rails.
Availability
NCV8503PW25R2G is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, and body control modules requiring stable component supply under automotive temperature and transient stress conditions.
Supply support for NCV8503PW25R2G 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 supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV8503PW25R2G belongs to onsemi's automotive-qualified LDO portfolio, designed specifically to replace legacy 78xx-style regulators in next-generation ECU, BCM, and ADAS sub-systems with enhanced efficiency, integration, and reliability.
FAQ
What is the maximum input voltage rating for the NCV8503PW25R2G?
The NCV8503PW25R2G supports an absolute maximum input voltage of 45 V, with guaranteed operation from 1.9 V to 40 V. This range covers automotive cold-crank (down to 2.2 V) and load-dump (up to 40 V) events per ISO 7637-2, making the NCV8503PW25R2G suitable for direct battery connection without external clamping.
Does the NCV8503PW25R2G require an external capacitor on the output pin?
Yes, the NCV8503PW25R2G requires a minimum 1 µF ceramic capacitor on the OUT pin for stability. onsemi recommends a 2.2 µF X7R capacitor with ≤100 mΩ ESR; smaller values may cause oscillation under light load, while larger values improve transient response but increase start-up time. The NCV8503PW25R2G does not support electrolytic or tantalum capacitors due to ESR sensitivity.
How does the enable (EN) pin function on the NCV8503PW25R2G?
The EN pin on the NCV8503PW25R2G is an active-high digital input with built-in hysteresis. It turns the regulator ON when voltage exceeds 2.0 V (typical) and OFF when voltage drops below 1.2 V (typical). Pulling EN low places the output in high-impedance state, reducing total system current to <1 µA. This feature enables precise power sequencing in multi-rail automotive systems using the NCV8503PW25R2G.
Is the NCV8503PW25R2G compatible with lead-free PCB assembly processes?
Yes, the NCV8503PW25R2G uses a RoHS-compliant, lead-free matte-tin finish on its SOT-223 terminals and is qualified for standard Pb-free reflow profiles (J-STD-020D, peak 260 °C). The package's thermal pad must be soldered to a minimum 100 mm² copper area for reliable thermal performance and mechanical attachment during automated assembly of the NCV8503PW25R2G.
What failure protections are integrated into the NCV8503PW25R2G?
NCV8503PW25R2G integrates three autonomous protections: reverse-battery protection (withstands −40 V on IN), thermal shutdown with foldback (activates at ~165 °C junction, reduces current above 150 °C), and current limiting (~350 mA typical). All operate without external components and recover automatically after fault removal-critical for unattended automotive subsystems relying on the NCV8503PW25R2G.
NCV8503PW25R2G 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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- 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
NCV8503PW25R2G FAQ
1.How can I place an order for NCV8503PW25R2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8503PW25R2G 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 NCV8503PW25R2G reliable?
The price and inventory of NCV8503PW25R2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8503PW25R2G is usually 5 days.
3.What payment methods are accepted for NCV8503PW25R2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8503PW25R2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8503PW25R2G?
NCV8503PW25R2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8503PW25R2G 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 NCV8503PW25R2G?
For technical support, including NCV8503PW25R2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8503PW25R2G requirements.
6.How does Aetrix verify that NCV8503PW25R2G is sourced from the original manufacturer or authorized distributors?
All NCV8503PW25R2G 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 NCV8503PW25R2G meets industry standards.
7.What is the process for return or replacement of NCV8503PW25R2G?
All NCV8503PW25R2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8503PW25R2G, 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 NCV8503PW25R2G part is unused and in its original packaging.
Return procedure for NCV8503PW25R2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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