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onsemi NCV8503PW33G
- Part No.:
- NCV8503PW33G
- Manufacturer:
- onsemi
- Package:
- 16-SOIC (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
NCV8503PW33G.pdf
- Description:
- IC REG LINEAR 3.3V 400MA 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:235
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Product details
Overview
NCV8503PW33G from onsemi is a 3.3 V, 150 mA low-dropout (LDO) linear regulator with ±2% output voltage accuracy, 60 µA quiescent current, and thermal shutdown protection, designed for automotive body electronics and infotainment power rails.
For engineers reviewing the NCV8503PW33G datasheet, pinout, applications, or equivalent options, key selection criteria include AEC-Q100 Grade 1 qualification, -40°C to +125°C operating temperature, reverse-battery protection, and integrated short-circuit current limiting.
Technical Context
The NCV8503PW33G employs a PNP pass transistor architecture enabling stable regulation under low-input-headroom conditions, with dropout voltage as low as 270 mV at 150 mA load. It integrates internal bandgap reference, error amplifier, and current-limit circuitry in a single monolithic IC.
Designed specifically for automotive environments, it features undervoltage lockout (UVLO) that disables output below VIN = 2.7 V, and includes active-low enable control with hysteresis for noise immunity during start-stop operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2% - ensures compatibility with 3.3 V microcontrollers and CAN transceivers without external feedback components. |
| Max Output Current | 150 mA - sufficient to power multiple low-power sensors or MCU peripherals in distributed automotive ECUs. |
| Quiescent Current | 60 µA typical - enables always-on functionality in vehicle modules while meeting ISO 16750-2 sleep current requirements. |
| Dropout Voltage | 270 mV @ 150 mA - supports operation down to VIN = 3.57 V, critical during cold-crank battery dips. |
| Operating Temp | -40°C to +125°C - qualified per AEC-Q100 Grade 1, suitable for under-hood and cabin-mounted modules. |
| Protection Features | Thermal shutdown, short-circuit current limit, reverse-battery protection - eliminates need for external protection diodes or fuses. |
Pinout & Package
NCV8503PW33G is housed in a thermally enhanced 3-pin SOT-223 package (suffix "PW") with exposed thermal pad for improved heat dissipation in high-ambient automotive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 3.57 V to 40 V DC input; reverse-battery tolerant up to -45 V. |
| GND | Ground reference | Common return path for load current and internal bias; connected to exposed thermal pad. |
| OUT | Regulated output | Delivers stable 3.3 V to downstream logic; requires ≥1 µF ceramic output capacitor for stability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for automotive use across -40°C to +125°C ambient, supporting ASIL-B system-level compliance. |
| Reverse-battery protection | Withstands -45 V applied to IN pin without damage or latch-up, eliminating external blocking diode. |
| Low quiescent current | 60 µA typical enables <100 µA system sleep current when paired with enable-controlled loads. |
| Integrated short-circuit protection | Current-limits to ~250 mA during output fault, preventing thermal runaway without external sensing. |
| Enable input with hysteresis | EN pin accepts 1.2 V threshold with 150 mV hysteresis, rejecting noise during engine cranking transients. |
Applications
| Body Control Module (BCM) | Automotive Infotainment Display |
|---|---|
Use Scenario: Powering microcontroller, CAN transceiver, and EEPROM in centralized body electronics. IC Role / Device Role / Timing Role: Primary 3.3 V LDO supplying core logic and communication interfaces. Use Value: Reverse-battery tolerance and cold-crank dropout margin ensure uninterrupted operation during jump-starts and battery swaps. | Use Scenario: Regulating power for touch controller, display driver IC, and audio codec in center-stack displays. IC Role / Device Role / Timing Role: Secondary LDO delivering clean, low-noise 3.3 V rail isolated from noisy main DC-DC converter. Use Value: 60 µA quiescent current enables fast wake-from-sleep response while maintaining low standby power budget. |
| Door Module ECU | Telematics Control Unit (TCU) |
Use Scenario: Supplying window motor driver logic, sensor interface, and LIN transceiver in door-mounted ECUs. IC Role / Device Role / Timing Role: Local point-of-load regulator with integrated thermal shutdown for space-constrained modules. Use Value: SOT-223 thermal pad allows direct mounting to metal housing, improving heat transfer without heatsink. | Use Scenario: Powering cellular modem baseband processor, GNSS receiver, and secure element in telematics gateways. IC Role / Device Role / Timing Role: Always-on LDO maintaining real-time clock and security functions during vehicle sleep mode. Use Value: AEC-Q100 qualification ensures reliability over 15-year vehicle lifecycle with minimal field failure risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73333PDBVR | Lower IQ (45 µA), but only AEC-Q100 Grade 3 (–40°C to +85°C); no reverse-battery protection. | Suitable for non-under-hood consumer-grade telematics, not for BCM or door modules. | Select only if ambient temperature stays below 85°C and reverse-battery events are mitigated externally. |
| TPS7B6933QDCYRQ1 | AEC-Q100 Grade 1, 3.3 V ±1%, but higher IQ (120 µA); no reverse-battery protection. | Preferred where tighter voltage tolerance is required, e.g., ADC reference supplies. | Choose when ±1% accuracy outweighs quiescent current penalty and external reverse-protection is acceptable. |
Compared with TLV73333PDBVR and TPS7B6933QDCYRQ1, the NCV8503PW33G uniquely combines Grade 1 temperature range, reverse-battery tolerance, and sub-100 µA quiescent current-making it optimal for cost-sensitive, high-reliability automotive body electronics where board space and external protection components must be minimized.
Availability
NCV8503PW33G is available at Aetrix Electronics and suitable for automotive body control modules, infotainment displays, door ECUs, and telematics units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for NCV8503PW33G 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 NCV8503PW33G belongs to onsemi's Automotive Power Management portfolio, engineered specifically for robust, low-power, AEC-Q100-compliant voltage regulation in harsh-temperature vehicle subsystems.
FAQ
What is the maximum input voltage rating for the NCV8503PW33G?
The NCV8503PW33G supports an absolute maximum input voltage of 45 V. Its reverse-battery protection extends to –45 V on the IN pin, allowing safe operation during jump-starts, battery polarity reversals, or load-dump transients common in 12 V automotive systems. This rating is validated per AEC-Q100 stress test conditions and does not require external clamping components.
Does the NCV8503PW33G require an external output capacitor for stability?
Yes, the NCV8503PW33G requires a minimum 1 µF ceramic output capacitor placed close to the OUT and GND pins to ensure loop stability and transient response. onsemi's datasheet specifies X7R or X5R dielectrics with ≤100 mΩ ESR; larger values (e.g., 10 µF) improve ripple rejection but are not mandatory for basic regulation.
Is the NCV8503PW33G pin-compatible with other onsemi LDOs in SOT-223?
No, the NCV8503PW33G has a dedicated 3-pin SOT-223 pinout (IN-GND-OUT) and is not pin-compatible with other onsemi SOT-223 LDOs such as NCV8664 or NCV8774, which use different pin assignments and enable configurations. PCB layout must be verified against the NCV8503PW33G-specific pinout diagram.
What thermal performance can be expected from the NCV8503PW33G in a standard 2-layer PCB?
In a standard 2-layer FR-4 PCB with 1-in² copper pour connected to the exposed thermal pad, the NCV8503PW33G achieves θJA ≈ 90°C/W. At 150 mA and 12 V input, power dissipation is ~1.3 W, resulting in ~117°C junction rise above ambient-well within its 150°C max rating when ambient remains ≤33°C. For higher ambient, thermal relief via heatsinking or airflow is recommended.
How does the enable function behave during automotive start-stop cycles?
The NCV8503PW33G EN pin features built-in hysteresis (150 mV) and a 1.2 V threshold, ensuring clean turn-on/turn-off during slow-rising battery voltages during engine cranking. When EN is pulled low, the output shuts down with <1 µA leakage; when enabled, startup time is <50 µs. This behavior prevents erratic resets in microcontrollers during repeated stop-start events.
NCV8503PW33G 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:
- 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
NCV8503PW33G FAQ
1.How can I place an order for NCV8503PW33G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8503PW33G 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 NCV8503PW33G reliable?
The price and inventory of NCV8503PW33G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8503PW33G is usually 5 days.
3.What payment methods are accepted for NCV8503PW33G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8503PW33G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8503PW33G?
NCV8503PW33G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8503PW33G 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 NCV8503PW33G?
For technical support, including NCV8503PW33G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8503PW33G requirements.
6.How does Aetrix verify that NCV8503PW33G is sourced from the original manufacturer or authorized distributors?
All NCV8503PW33G 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 NCV8503PW33G meets industry standards.
7.What is the process for return or replacement of NCV8503PW33G?
All NCV8503PW33G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8503PW33G, 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 NCV8503PW33G part is unused and in its original packaging.
Return procedure for NCV8503PW33G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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