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onsemi NCV4276DS50G
- Part No.:
- NCV4276DS50G
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
NCV4276DS50G.pdf
- Description:
- IC REG LINEAR 5V 400MA D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,043
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Product details
Overview
NCV4276DS50G from onsemi is an automotive-grade 400 mA low-dropout linear regulator with fixed 5.0 V output, ±4% accuracy, 500 mV max dropout at 250 mA, reverse input voltage protection (−42 V), and +45 V peak transient tolerance. It features inhibit control, thermal shutdown, overcurrent protection, and operates across −40°C to +150°C in harsh vehicle environments such as engine control units and body electronics.
For engineers reviewing the NCV4276DS50G datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, package-specific thermal data, real-world stability guidance for ceramic output capacitors, and validated alternatives for automotive power rail design.
Technical Context
The NCV4276DS50G uses a PNP series pass transistor driven by a bandgap-referenced error amplifier to achieve ultra-low dropout and temperature-stable regulation. Its saturation control logic minimizes ground current under low-input or overload conditions while maintaining 5.0 V output within ±4% across 5.0–40 V input and −40°C to +150°C junction temperature.
Inhibit functionality enables precise system-level power sequencing: output disables when INH < 0.5 V and enables when INH > 3.5 V. Protection includes short-circuit current limiting, thermal shutdown at 150°C (guaranteed by design), and fault-safe operation during load dumps up to +45 V and reverse battery events down to −42 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±4% (4.8–5.2 V) - stable across 5.0 mA–400 mA load and 6.0–40 V input. |
| Max Output Current | 400 mA continuous - supports ECU sub-rails, sensor interfaces, and microcontroller I/O domains. |
| Dropout Voltage | ≤500 mV at 250 mA - enables operation with minimal headroom (e.g., 5.5 V input sustains 5.0 V output). |
| Input Voltage Range | −42 V to +45 V - withstands automotive load dump, cold crank, and reverse battery conditions. |
| Quiescent Current | ≤10 µA in inhibit sleep mode - critical for always-on vehicle modules with strict leakage budgets. |
| Thermal Shutdown | 150°C junction threshold - protects die during sustained overload or poor heatsinking. |
| Operating Temperature | −40°C to +150°C - qualified for under-hood and transmission-control applications. |
Pinout & Package
D2PAK-5 (Case 936A, DS suffix) surface-mount package with integrated heatsink tab (Pin 3). Designed for high-power dissipation in constrained automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I) | Input | Battery supply input; accepts −42 V to +45 V transients; requires CI1 (1 µF) + CI2 (100 nF) decoupling. |
| 2 (INH) | Inhibit Control | Active-low enable: <0.5 V disables output; >3.5 V enables; compatible with 3.3 V/5 V logic. |
| 3 (GND) | Ground / Heatsink | Internally connected to exposed metal tab; must be soldered to large copper pour for thermal management. |
| 4 (NC) | No Connect | Not bonded; left floating - no external connection required for fixed 5.0 V version. |
| 5 (Q) | Regulated Output | 5.0 V output; bypass with 22 µF capacitor to GND; stable with ESR 0.01–10 Ω (per Fig. 6). |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualification | NCV prefix confirms AEC-Q100 stress testing and PPAP-ready manufacturing for safety-critical systems. |
| Reverse Battery Protection | Withstands −42 V applied to Pin 1 without damage - eliminates need for external blocking diode. |
| Load-Dump Immunity | Operates through +45 V transients per ISO 7637-2 Pulse 5a - avoids reset or latch-up in 12 V systems. |
| Low Ground Current | 25–35 mA at 400 mA load - reduces power loss and improves efficiency vs. legacy LDOs. |
| Adjustable Stability | Stable with ceramic output capacitors (10–100 µF); ESR range defined per output voltage (Fig. 5–8). |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powering microcontroller core logic and CAN transceivers in gasoline/diesel engine compartments. IC Role / Device Role / Timing Role: Primary 5.0 V LDO supplying MCU I/O, ADC reference, and serial interface rails. Use Value: Maintains regulation during cranking (5.5 V min) and load dump (+45 V), ensuring uninterrupted CAN communication. |
Use Scenario: Supplying door module MCUs, window motor drivers, and LED interior lighting controllers. IC Role / Device Role / Timing Role: Secondary 5.0 V regulator for distributed body electronics with local inhibit control. Use Value: Inhibit pin enables synchronized power-down during vehicle sleep mode, reducing parasitic drain to <10 µA. |
| Transmission Control Unit (TCU) | Advanced Driver Assistance Systems (ADAS) |
Use Scenario: Providing clean 5.0 V bias to solenoid driver ICs and gear position sensors in automatic transmissions. IC Role / Device Role / Timing Role: High-reliability LDO with thermal shutdown protecting against oil-cooling failure scenarios. Use Value: 150°C shutdown threshold prevents thermal runaway during extended high-load operation in hot gearbox environments. |
Use Scenario: Powering radar sensor front-end ASICs and camera ISP processors in parking assist modules. IC Role / Device Role / Timing Role: Noise-sensitive 5.0 V supply with low PSRR degradation above 100 Hz (60 dB typical). Use Value: Stable output under RF interference ensures accurate time-of-flight measurements and image signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV8664DS50G | Same D2PAK-5 package, 450 mA output, 400 mV dropout at 250 mA, ±2% output accuracy. | Higher accuracy and lower dropout - preferred for precision analog subsystems requiring tighter regulation. | Select when ±2% tolerance and <400 mV dropout are mandatory; verify thermal margin with reduced RJA. |
| TLV73350PDBVR | SOT-23-5 package, 300 mA output, 170 mV dropout at 300 mA, −40°C to +125°C rating. | Smaller footprint and lower quiescent current (4 µA), but lacks automotive transient protection. | Use only in non-safety-critical cabin modules; requires external TVS for load dump immunity. |
Compared with NCV4276DS50G, NCV8664DS50G offers tighter regulation and lower dropout for demanding analog loads, while TLV73350PDBVR provides space savings and ultra-low IQ at the cost of automotive-grade ruggedness and current capability.
Availability
NCV4276DS50G is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control units requiring stable component supply across automotive production lifecycles.
Supply support for NCV4276DS50G 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The NCV4276DS50G belongs to onsemi's SMART REGULATOR® family - engineered specifically for automotive power management with integrated fault protection, wide temperature operation, and robust transient handling.
FAQ
What is the maximum input voltage the NCV4276DS50G can withstand without damage?
The NCV4276DS50G supports −42 V reverse input voltage and +45 V peak transient voltage per ISO 7637-2 Pulse 5a. These ratings are absolute maximums - sustained operation above 40 V input is not recommended. The device remains functional during load dump events without external protection components, making it ideal for direct-battery-connected automotive subsystems.
Does the NCV4276DS50G require an external capacitor on the INH pin?
No, the NCV4276DS50G does not require an external capacitor on the INH pin. The inhibit input is CMOS-compatible with TTL/CMOS logic levels: output disables below 0.5 V and enables above 3.5 V. A simple pull-up resistor to VI or microcontroller GPIO suffices. Adding capacitance may slow response and is unnecessary unless intentional debouncing is needed.
Can the NCV4276DS50G operate with a 10 µF ceramic output capacitor?
Yes - the NCV4276DS50G is stable with 10 µF ceramic output capacitors for 5.0 V output, provided ESR is between 0.01 Ω and 10 Ω (per Figure 6). Murata GRM31CR71C106KAC7 (1206, X7R, 16 V) is a validated part. Lower ESR improves transient response but requires verification against stability boundaries shown in the datasheet.
What is the thermal resistance (RJA) of the NCV4276DS50G in a standard layout?
For the D2PAK-5 (DS) package on a 0.4 sq. in. copper spreader board, RJA is 74.8°C/W (typical). With a 1.2 sq. in. spreader, it drops to 41.6°C/W. These values assume 1 oz. copper, FR4 substrate, and proper soldering of Pin 3 (GND/tab) to thermal plane. Actual RJA must be calculated using Equation 2 from the datasheet based on worst-case power dissipation.
Is the NCV4276DS50G pin-compatible with other NCV4276 variants like the DT (DPAK) version?
No - the NCV4276DS50G (D2PAK-5) and NCV4276DT50G (DPAK-5) share identical pin numbering and function but differ in thermal performance and package dimensions. They are not mechanically interchangeable: D2PAK has larger tab area and lower RJA, while DPAK fits tighter spaces. PCB layout must match the specific case code (DS vs. DT) to ensure thermal reliability.
NCV4276DS50G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tube
- 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 @ 250mA
- Current - Output:
- 400mA
- Current - Quiescent (Iq):
- 220 µA
- Current - Supply (Max):
- 35 mA
- PSRR:
- 60dB (100Hz)
- Control Features:
- -
- 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:
- D2PAK-5
NCV4276DS50G FAQ
1.How can I place an order for NCV4276DS50G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV4276DS50G 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 NCV4276DS50G reliable?
The price and inventory of NCV4276DS50G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV4276DS50G is usually 5 days.
3.What payment methods are accepted for NCV4276DS50G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV4276DS50G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV4276DS50G?
NCV4276DS50G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV4276DS50G 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 NCV4276DS50G?
For technical support, including NCV4276DS50G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV4276DS50G requirements.
6.How does Aetrix verify that NCV4276DS50G is sourced from the original manufacturer or authorized distributors?
All NCV4276DS50G 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 NCV4276DS50G meets industry standards.
7.What is the process for return or replacement of NCV4276DS50G?
All NCV4276DS50G units undergo pre-shipment inspection (PSI). If there is an issue with NCV4276DS50G, 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 NCV4276DS50G part is unused and in its original packaging.
Return procedure for NCV4276DS50G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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