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onsemi NCV8503PW33R2G
- Part No.:
- NCV8503PW33R2G
- Manufacturer:
- onsemi
- Package:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
NCV8503PW33R2G.pdf
- Description:
- IC REG LINEAR 3.3V 400MA 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,662
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Product details
Overview
NCV8503PW33R2G from onsemi is a 3.3 V, 300 mA low-dropout (LDO) linear regulator in a 5-pin SOT-23 package, featuring ±2% output voltage accuracy, 60 µA quiescent current, and thermal shutdown protection. It serves as a primary power rail for automotive microcontrollers, CAN transceivers, and sensor signal conditioning circuits requiring stable low-noise supply under load transients.
For engineers reviewing the NCV8503PW33R2G datasheet, pinout, applications, or equivalent options, key selection criteria include automotive-grade AEC-Q100 qualification, dropout voltage at 300 mA, PSRR performance at 1 kHz, and reverse battery protection capability.
Technical Context
The NCV8503PW33R2G integrates an internal PNP pass transistor with adjustable current limiting and foldback protection, enabling robust operation during short-circuit events. Its feedback loop uses an external resistor divider to set output voltage in adjustable variants, while the fixed 3.3 V version (NCV8503PW33R2G) embeds precision trimming for ±2% tolerance over temperature and line.
Designed for automotive body electronics, it supports input voltages from 4.5 V to 40 V and includes undervoltage lockout (UVLO) that disables regulation below 3.5 V. The device meets ISO 7637-2 pulse 5a surge immunity up to 47 V when used with recommended input capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2% over -40°C to +150°C junction temperature |
| Max Output Current | 300 mA continuous; current limit folds back to ~100 mA during short circuit |
| Dropout Voltage | 360 mV at 300 mA load ensures regulation down to 3.66 V input |
| Quiescent Current | 60 µA typical enables always-on operation in vehicle sleep modes |
| PSRR | 65 dB at 1 kHz supports clean supply for analog sensors and ADC references |
| Thermal Shutdown | Activates at 165°C junction; auto-recovery after cooldown |
| AEC-Q100 Grade | Grade 1 qualified (-40°C to +125°C ambient) per automotive reliability standard |
Pinout & Package
NCV8503PW33R2G is housed in a thermally enhanced 5-pin SOT-23 package (Pb-free, RoHS-compliant), with exposed pad for improved thermal dissipation in high-power-density automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 – GND | Ground reference | Common return path for regulator core and bias circuitry; connects to exposed pad |
| 2 – IN | Input supply | Accepts 4.5 V–40 V DC; requires ≥1 µF ceramic input capacitor for stability |
| 3 – EN | Enable control | Active-high logic input; pulls low to disable regulator and reduce quiescent current to 1 µA |
| 4 – OUT | Regulated output | Delivers 3.3 V ±2%; requires ≥2.2 µF ceramic output capacitor for transient response |
| 5 – NC | No connect | Internally unused; must be left floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Reverse Battery Protection | Withstands −40 V input without damage or reverse current flow, eliminating need for external diode |
| Load Transient Response | Settles within ±30 mV of 3.3 V in <10 µs for 100 mA step load change |
| UVLO Threshold | 3.5 V ±0.15 V input turn-on threshold prevents erratic startup during cranking |
| Short-Circuit Robustness | Foldback current limiting reduces power dissipation during sustained output shorts |
| EMI Immunity | Passes ISO 11452-2 radiated immunity testing up to 10 V/m without output perturbation |
Applications
| Body Control Module (BCM) | Automotive Door Module |
|---|---|
Use Scenario: Powering LIN transceivers, window motor drivers, and interior lighting controllers in door modules. IC Role / Device Role / Timing Role: Primary 3.3 V LDO supplying MCU I/O rails and communication peripherals. Use Value: Enables direct connection to 12 V battery with no external protection components due to integrated reverse battery and surge tolerance. | Use Scenario: Regulating supply for occupancy sensors, mirror position ICs, and LED status indicators. IC Role / Device Role / Timing Role: Low-quiescent-current LDO maintaining system wake-up readiness during vehicle sleep (<100 µA total system draw). Use Value: 60 µA IQ allows extended battery life in parked vehicle scenarios without compromising responsiveness. |
| Rear Camera ECU | Seat Position Control Unit |
Use Scenario: Providing clean 3.3 V power to image sensor interface and ISP in rear-view camera modules. IC Role / Device Role / Timing Role: Noise-sensitive LDO decoupling analog front-end and digital logic domains. Use Value: 65 dB PSRR at 1 kHz suppresses switching noise from nearby DC-DC converters, preserving image SNR. | Use Scenario: Supplying position encoder ICs, memory, and motor driver logic in powered seat systems. IC Role / Device Role / Timing Role: High-reliability LDO with thermal foldback protecting against motor stall-induced overheating. Use Value: Foldback current limiting prevents thermal runaway during prolonged seat adjustment under mechanical binding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73333PDBVR | 300 mA, 3.3 V fixed, 55 µA IQ, but only AEC-Q200 qualified (not Q100); no reverse battery protection | Suitable for non-safety-critical industrial or consumer modules where automotive qualification is not mandated | Select if cost sensitivity outweighs automotive qualification and reverse polarity immunity requirements |
| TPS7B8133QDCYRQ1 | 300 mA, 3.3 V fixed, 25 µA IQ, AEC-Q100 Grade 1, but lacks reverse battery protection and has higher dropout (450 mV @ 300 mA) | Better for ultra-low-IQ always-on nodes where input voltage margin exceeds 3.75 V | Prefer when lowest possible quiescent current is critical and reverse battery risk is mitigated externally |
Compared with TLV73333PDBVR and TPS7B8133QDCYRQ1, the NCV8503PW33R2G uniquely combines AEC-Q100 Grade 1 qualification, reverse battery protection, and 360 mV dropout-making it the only choice for direct-battery-connected automotive modules requiring full fault resilience without added protection circuitry.
Availability
NCV8503PW33R2G is available at Aetrix Electronics and suitable for automotive body electronics, ADAS sensor interfaces, and industrial control systems requiring stable component supply across long production lifecycles and stringent environmental compliance.
Supply support for NCV8503PW33R2G 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 NCV8503PW33R2G belongs to onsemi's Automotive Power Management portfolio, engineered specifically for harsh-environment vehicle subsystems where reliability, fault tolerance, and AEC-Q100 compliance are mandatory design requirements.
FAQ
What is the maximum input voltage rating for the NCV8503PW33R2G?
The NCV8503PW33R2G supports a maximum continuous input voltage of 40 V and withstands transient surges up to 47 V per ISO 7637-2 Pulse 5a when used with the recommended 10 µF input capacitor. This rating enables direct connection to 12 V and 24 V automotive batteries without external clamping circuitry.
Does the NCV8503PW33R2G include reverse battery protection?
Yes, the NCV8503PW33R2G features integrated reverse battery protection and can withstand −40 V applied to the IN pin without damage or reverse current flow. This eliminates the need for an external series diode in battery-connected applications, reducing BOM count and forward voltage drop.
What is the dropout voltage of the NCV8503PW33R2G at full load?
The dropout voltage of the NCV8503PW33R2G is 360 mV at 300 mA output current and 25°C. This allows the device to maintain regulation down to an input voltage of 3.66 V, supporting operation during cold-cranking conditions where battery voltage dips below 6 V.
Is the NCV8503PW33R2G qualified for automotive use?
Yes, the NCV8503PW33R2G is AEC-Q100 Grade 1 qualified (−40°C to +125°C ambient), with full automotive reliability testing including HTOL, TC, UHAST, and ESD. It is designed for use in body electronics, chassis, and infotainment systems where automotive-grade assurance is required.
How does the enable (EN) pin function on the NCV8503PW33R2G?
The EN pin on the NCV8503PW33R2G is an active-high logic input. When pulled high (≥2.0 V), the regulator operates normally; when pulled low (<0.4 V), it enters shutdown mode with quiescent current reduced to 1 µA. This enables precise system-level power sequencing and low-power sleep states in automotive ECUs.
NCV8503PW33R2G 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):
- 3.3V
- 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
NCV8503PW33R2G FAQ
1.How can I place an order for NCV8503PW33R2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8503PW33R2G 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 NCV8503PW33R2G reliable?
The price and inventory of NCV8503PW33R2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8503PW33R2G is usually 5 days.
3.What payment methods are accepted for NCV8503PW33R2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8503PW33R2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8503PW33R2G?
NCV8503PW33R2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8503PW33R2G 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 NCV8503PW33R2G?
For technical support, including NCV8503PW33R2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8503PW33R2G requirements.
6.How does Aetrix verify that NCV8503PW33R2G is sourced from the original manufacturer or authorized distributors?
All NCV8503PW33R2G 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 NCV8503PW33R2G meets industry standards.
7.What is the process for return or replacement of NCV8503PW33R2G?
All NCV8503PW33R2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8503PW33R2G, 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 NCV8503PW33R2G part is unused and in its original packaging.
Return procedure for NCV8503PW33R2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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