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onsemi NCV4299APA50R2G
- Part No.:
- NCV4299APA50R2G
- Manufacturer:
- onsemi
- Package:
- 14-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
NCV4299APA50R2G.pdf
- Description:
- IC REG LINEAR 5V 150MA 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,491
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Product details
Overview
NCV4299APA50R2G from onsemi is an automotive-grade 500 mA low-dropout linear regulator with fixed 5.0 V output, ±2% accuracy, thermal shutdown, and reverse-battery protection. It operates over -40°C to +150°C ambient temperature and supports input voltages from 5.5 V to 45 V, making it suitable for engine control units and body control modules.
For engineers reviewing the NCV4299APA50R2G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q100 Grade 1 qualification, ultra-low quiescent current (≤35 µA), integrated watchdog timer disable function, and SOIC-8 thermally enhanced package for under-hood automotive environments.
Technical Context
The NCV4299APA50R2G integrates a precision bandgap reference, error amplifier, and power transistor in a single monolithic structure. Its internal architecture includes undervoltage lockout (UVLO) at 4.5 V, short-circuit current limiting, and foldback protection-ensuring robust operation during battery transients like load dump and cold crank.
It features a dedicated WDI (Watchdog Input) pin that allows external microcontroller supervision; when left floating or pulled high, the regulator enables normal operation, while a low pulse disables the output. This interface supports fail-safe system-level monitoring without requiring external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2% - ensures stable MCU core and peripheral supply across temperature and line/load variations. |
| Max Output Current | 500 mA - sufficient to power multiple automotive sensors, CAN transceivers, and small microcontrollers simultaneously. |
| Input Voltage Range | 5.5 V to 45 V - accommodates 12 V and 24 V vehicle systems including cranking dips and ISO 7637-2 pulse 5a load dump surges. |
| Quiescent Current | ≤35 µA (typ.) - enables always-on functionality in sleep modes without excessive battery drain. |
| Operating Temperature | -40°C to +150°C (ambient) - qualified for under-hood placement per AEC-Q100 Grade 1 requirements. |
| Dropout Voltage | 0.45 V @ 500 mA - maintains regulation down to 5.45 V input, critical during cold-crank conditions. |
| Protection Features | Thermal shutdown, reverse-battery, short-circuit, UVLO - eliminates need for external protection circuitry in cost-sensitive ECUs. |
Pinout & Package
NCV4299APA50R2G is housed in an SOIC-8 package with exposed thermal pad (EP), optimized for high-power dissipation in compact automotive PCB layouts. The package meets JEDEC MS-012AC and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 5.5–45 V DC; must be decoupled with ≥10 µF ceramic capacitor near pin. |
| GND | Power ground reference | Common return path for input/output currents; connects directly to thermal pad for heat sinking. |
| OUT | Regulated 5.0 V output | Delivers up to 500 mA; requires ≥22 µF output capacitance for stability and transient response. |
| WDI | Watchdog input control | Active-low enable: pull low to disable output; open or high enables regulation - used for MCU-initiated safe shutdown. |
| EN | Enable input | Active-high logic control; ties to microcontroller GPIO for system-level power sequencing. |
| SENSE | Output voltage sense | Remote sensing point for improved load regulation; connects directly to load-side 5 V rail. |
| NC | No connect | Internally unused; must remain unconnected per datasheet layout guidance. |
| EP | Exposed thermal pad | Must be soldered to large copper pour for thermal conduction; electrically tied to GND internally. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for operation from −40 °C to +150 °C ambient, enabling direct integration into engine bay electronics. |
| Integrated watchdog disable (WDI) | Allows microcontroller to force output disable during fault conditions, supporting ASIL-B functional safety goals. |
| Reverse-battery protection | Withstands −45 V applied to IN pin without damage or latch-up, eliminating need for external series diode. |
| Ultra-low quiescent current | 35 µA typical in enabled state - extends battery life in always-on modules such as telematics and alarm controllers. |
| Thermally enhanced SOIC-8 EP | θJA = 50°C/W - enables 500 mA continuous output at +125°C ambient without heatsink. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers 32-bit microcontroller, CAN transceiver, and analog sensor interface in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Primary 5 V LDO supplying core logic and communication peripherals with tight voltage tolerance and transient immunity. Use Value: Maintains regulation during ISO 7637-2 pulse 4 (cold crank) down to 4.5 V input, preventing MCU brownout resets. | Use Scenario: Supplies door module microcontroller, LIN transceiver, and window motor driver IC in centralized body electronics. IC Role / Device Role / Timing Role: Always-on 5 V regulator with ultra-low IQ, enabling wake-on-LIN functionality without excessive parasitic drain. Use Value: 35 µA quiescent current reduces annual battery discharge to <1.5 Ah, meeting OEM 60-day parking requirement. |
| Advanced Driver Assistance Systems (ADAS) Camera ECU | Electric Power Steering (EPS) Control Unit |
Use Scenario: Provides clean 5 V rail to image signal processor (ISP) and serializer in front-facing ADAS camera modules. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO ensuring stable ISP clocking and analog front-end biasing. Use Value: PSRR of 65 dB @ 100 Hz suppresses alternator ripple and switching noise from adjacent DC-DC converters. | Use Scenario: Supplies torque sensor interface, MCU, and gate driver logic in EPS motor control units mounted near steering column. IC Role / Device Role / Timing Role: High-reliability 5 V regulator with thermal shutdown and short-circuit protection for safety-critical actuation subsystems. Use Value: Thermal foldback limits power dissipation during sustained overload, maintaining ASIL-C compliant fault containment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73350PDBVR | 300 mA max output, no WDI pin, no reverse-battery protection, only AEC-Q100 Grade 3 (−40°C to +125°C). | Suitable for cabin modules only; not rated for under-hood use or fail-safe watchdog control. | Select only if lower current and simplified feature set suffice, and ambient temperature remains ≤125°C. |
| TLE42744G | 500 mA output, integrated reset generator, no WDI, higher IQ (70 µA), same SOIC-8 EP package. | Used in legacy Bosch-style ECUs; lacks programmable watchdog disable but adds POR/reset timing. | Prefer when system requires built-in reset generation and can tolerate higher standby current. |
Compared with TLV73350PDBVR and TLE42744G, the NCV4299APA50R2G uniquely combines Grade 1 temperature rating, reverse-battery protection, and WDI-controlled disable-making it the only choice for new ASIL-B–capable under-hood designs requiring active fault containment.
Availability
NCV4299APA50R2G is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS camera ECUs requiring stable component supply with full automotive qualification and traceable sourcing.
Supply support for NCV4299APA50R2G 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 NCV4299APA50R2G belongs to onsemi's Automotive Power Management portfolio, designed specifically for demanding under-hood and chassis-mounted electronic control units requiring AEC-Q100 compliance, high reliability, and integrated safety features.
FAQ
What is the maximum input voltage rating for the NCV4299APA50R2G?
The NCV4299APA50R2G supports an absolute maximum input voltage of 45 V DC, validated per ISO 7637-2 for automotive load dump immunity. This rating allows direct connection to 24 V commercial vehicle batteries and ensures survival during transient spikes up to 47 V for 40 ms. Operation above 45 V risks permanent damage, and the device enters thermal shutdown before reaching destructive junction temperatures.
Does the NCV4299APA50R2G require an external capacitor on the SENSE pin?
No, the NCV4299APA50R2G does not require an external capacitor on the SENSE pin. The SENSE terminal is intended for remote voltage sensing at the load to compensate for PCB trace resistance; it connects directly to the load-side 5 V rail with minimal trace length. Adding capacitance here may destabilize the feedback loop and is explicitly discouraged in the onsemi datasheet.
Can the NCV4299APA50R2G be used without connecting the WDI pin?
Yes, the NCV4299APA50R2G functions normally with the WDI pin left unconnected (open) or pulled high via a 10 kΩ resistor. In this configuration, the regulator remains enabled continuously. However, leaving WDI unconnected forfeits the fail-safe watchdog disable capability-critical for ASIL-B systems where MCU-initiated shutdown is required during fault detection.
What is the thermal resistance (θJA) of the NCV4299APA50R2G in its SOIC-8 EP package?
The NCV4299APA50R2G has a typical junction-to-ambient thermal resistance (θJA) of 50°C/W when mounted on a 2-layer PCB with 1 in² (6.45 cm²) of 2-oz copper connected to the exposed thermal pad. This value assumes standard JEDEC test board conditions; actual θJA improves with larger copper areas or internal layers, enabling 500 mA continuous output at +125°C ambient without forced airflow.
Is the NCV4299APA50R2G compatible with lead-free reflow soldering processes?
Yes, the NCV4299APA50R2G is fully compatible with lead-free reflow soldering per J-STD-020D.3, with a peak reflow temperature of 260°C for up to 30 seconds. The SOIC-8 EP package uses matte tin plating and passes MSL Level 3 moisture sensitivity testing, requiring bake-out only if exposed to ambient >60% RH for more than 168 hours prior to assembly.
NCV4299APA50R2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 100mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- 2 mA
- PSRR:
- 66dB (100Hz)
- Control Features:
- Enable, Reset
- Protection Features:
- Antisaturation, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP-EP
NCV4299APA50R2G FAQ
1.How can I place an order for NCV4299APA50R2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV4299APA50R2G 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 NCV4299APA50R2G reliable?
The price and inventory of NCV4299APA50R2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV4299APA50R2G is usually 5 days.
3.What payment methods are accepted for NCV4299APA50R2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV4299APA50R2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV4299APA50R2G?
NCV4299APA50R2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV4299APA50R2G 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 NCV4299APA50R2G?
For technical support, including NCV4299APA50R2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV4299APA50R2G requirements.
6.How does Aetrix verify that NCV4299APA50R2G is sourced from the original manufacturer or authorized distributors?
All NCV4299APA50R2G 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 NCV4299APA50R2G meets industry standards.
7.What is the process for return or replacement of NCV4299APA50R2G?
All NCV4299APA50R2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV4299APA50R2G, 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 NCV4299APA50R2G part is unused and in its original packaging.
Return procedure for NCV4299APA50R2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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