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onsemi NCV4276ADS50G
- Part No.:
- NCV4276ADS50G
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
NCV4276ADS50G.pdf
- Description:
- IC REG LINEAR 5V 400MA D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,109
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Product details
Overview
NCV4276ADS50G from onsemi is a 400 mA, 5.0 V fixed-output automotive-grade low-dropout linear regulator in DPAK-5 package with ±4% output voltage accuracy, 500 mV max dropout at 250 mA, and integrated inhibit control. It operates from 4.5 V to 40 V input, supports −40°C to +150°C junction temperature, and delivers stable power to microcontrollers and sensors in engine control units.
For engineers reviewing the NCV4276ADS50G datasheet, pinout, applications, or equivalent options, key selection criteria include its 45 V peak transient tolerance, −42 V reverse voltage protection, thermal shutdown at 150°C, quiescent current as low as 10 µA in sleep mode, and compatibility with wide-range output capacitors (22 µF, ESR-stable).
Technical Context
The NCV4276ADS50G uses a PNP series pass transistor controlled by an error amplifier with a bandgap reference, enabling ultra-low dropout and high stability across automotive temperature extremes. Its saturation control logic minimizes ground current under low-input or overload conditions while maintaining regulation.
Inhibit functionality allows precise system-level power sequencing: output disables when INH < 0.5 V and enables when INH > 3.5 V. Protection includes overcurrent limiting (400–1100 mA trip range), thermal shutdown (150°C nominal), short-circuit survival, and robust fault immunity against +45 V transients and −42 V reverse polarity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±4% (4.8–5.2 V) - tight tolerance ensures reliable logic-level supply for 5 V MCU peripherals without external trimming. |
| Max Output Current | 400 mA continuous - sufficient for powering multiple automotive sensors, CAN transceivers, or small microcontrollers. |
| Dropout Voltage | ≤500 mV at 250 mA (VI = 5.0 V) - enables operation down to 5.5 V input, critical for cold-crank scenarios in 12 V systems. |
| Input Voltage Range | 4.5 V to 40 V operating; −42 V to +45 V absolute max - withstands load-dump transients and reverse-battery faults per ISO 7637-2. |
| Quiescent Current | 10 µA max in inhibit-off (sleep) mode - preserves battery life during vehicle off-state in always-on modules. |
| Thermal Shutdown | 150°C junction threshold - protects die integrity during sustained overload or poor heatsinking in enclosed ECUs. |
| PSRR | ≥60 dB at 100 Hz - suppresses ripple from alternator or switching pre-regulators feeding the LDO input. |
Pinout & Package
DPAK-5 surface-mount package (Case 175AA), thermally enhanced with Pin 3 internally connected to heatsink. Designed for PCB copper pour thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - I | Input Supply | Battery rail connection; accepts 4.5–40 V with transient/ESD protection up to ±45 V. |
| 2 - INH | Inhibit Control | Active-low enable: pull ≤0.5 V to disable output; ≥3.5 V to enable - compatible with 3.3 V/5 V GPIO. |
| 3 - GND | Ground / Heatsink | Electrical ground and thermal path; must be soldered to large copper area for RJA ≤46.8°C/W. |
| 4 - NC | No Connect | Not bonded; left unconnected - no routing or decoupling required on this pin. |
| 5 - Q | Regulated Output | 5.0 V output; bypassed with ≥22 µF capacitor to GND for stability across ESR range (see Fig. 5–8). |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualification | NCV prefix, AEC-Q100 qualified - guaranteed operation from −40°C to +150°C junction, suitable for under-hood use. |
| Reverse Polarity Protection | Withstands −42 V applied to Input - eliminates need for external blocking diode in battery-reversal-prone environments. |
| Transient Immunity | +45 V peak input transient tolerance - meets ISO 7637-2 Pulse 5a requirements without external TVS. |
| Low-IQ Sleep Mode | 10 µA max ground current when inhibited - enables <10 µA system standby current in body control modules. |
| Stability with Ceramic Caps | Compatible with 22 µF X7R ceramic output capacitors (e.g., Murata GRM32ER71C226KE18) - reduces board space vs. electrolytics. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Powering 5 V microcontroller, knock sensor interface, and fuel injector drivers in gasoline/diesel engine compartments. IC Role / Device Role / Timing Role: Primary 5 V LDO supplying core logic and analog front-end circuitry with high transient immunity. Use Value: Survives 45 V load-dump events and −42 V reverse-battery faults without latch-up or damage, reducing BOM count. |
Use Scenario: Regulating 5 V supply for door module MCUs, window motor drivers, and LIN transceivers. IC Role / Device Role / Timing Role: System power supervisor with inhibit-controlled wake/sleep sequencing aligned to vehicle ignition state. Use Value: 10 µA sleep current enables <15 µA total module standby draw, meeting OEM low-power requirements. |
| Advanced Driver Assistance Systems (ADAS) | Infotainment Power Management |
|
Use Scenario: Providing clean 5 V bias to radar sensor signal conditioning ICs and camera image processors. IC Role / Device Role / Timing Role: Post-regulator after DC/DC converter, delivering low-noise, ripple-free supply for precision analog circuits. Use Value: 60 dB PSRR at 100 Hz suppresses switching noise from upstream buck converters, preserving ADC SNR. |
Use Scenario: Powering USB hub controllers, display timing controllers, and audio codecs in head unit mainboard. IC Role / Device Role / Timing Role: Secondary LDO ensuring stable 5 V rail independent of main 12 V bus fluctuations. Use Value: 500 mV dropout enables operation during cranking (battery dips to 6 V), preventing infotainment brownouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV4276ADT50G | D2PAK-5 package (Case 936A); lower RJA (41.6°C/W on 1.222 in² board) vs. DPAK's 46.8°C/W - better thermal performance at high ambient. | Suitable for higher-power modules where board space allows larger footprint and heatsinking is critical (e.g., transmission control units). | Select NCV4276ADT50G when thermal margin is constrained and PCB layout permits D2PAK; otherwise, NCV4276ADS50G offers smaller footprint and adequate thermal capability. |
| TLV73350PDBVR | 300 mA output, 250 mV dropout at 300 mA, SOT-23-5 package, ±1% accuracy - tighter tolerance but lower current and no reverse-voltage protection. | Targeted at low-power, non-automotive applications (e.g., portable instrumentation) where cost and size outweigh fault robustness. | Choose TLV73350PDBVR only for non-automotive designs with <300 mA load and no requirement for ISO 7637-2 compliance or reverse-battery survival. |
Compared with NCV4276ADT50G, the NCV4276ADS50G trades ~5°C/W higher thermal resistance for 30% smaller PCB area; versus TLV73350PDBVR, it delivers 33% more current, automotive-grade fault protection, and wider input range - making it irreplaceable in under-hood safety-critical systems.
Availability
NCV4276ADS50G is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS sensor power supplies requiring stable component supply across extended temperature and automotive qualification cycles.
Supply support for NCV4276ADS50G 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 focused on energy-efficient innovation, with leadership in automotive, industrial, and cloud power solutions.
The NCV4276ADS50G belongs to onsemi's SMART REGULATOR® family - engineered specifically for harsh automotive environments, emphasizing fault resilience, wide temperature operation, and system-level integration without external protection components.
FAQ
What is the maximum input voltage the NCV4276ADS50G can withstand without damage?
The NCV4276ADS50G has an absolute maximum input voltage rating of +45 V for transient events and −42 V for reverse polarity, per ISO 7637-2 Pulse 5a and reverse-battery test standards. Continuous operation is specified from 4.5 V to 40 V. Exceeding +45 V or −42 V may cause permanent damage, even briefly.
Does the NCV4276ADS50G require an external capacitor on the INH pin for noise immunity?
No, the NCV4276ADS50G does not require an external capacitor on the INH pin. Its inhibit input has built-in hysteresis and filtering; typical designs connect INH directly to a microcontroller GPIO or a resistor divider from VIN. Adding capacitance may slow response and is unnecessary unless extreme EMI environments demand additional filtering.
Can the NCV4276ADS50G be used with ceramic output capacitors, and what value is recommended?
Yes, the NCV4276ADS50G is fully compatible with ceramic output capacitors. The datasheet specifies 22 µF (e.g., Murata GRM32ER71C226KE18) as the standard value, stable across ESR ranges shown in Figure 5. For 5.0 V output, minimum ESR is defined by native ceramic ESR; no series resistor is needed.
What is the thermal resistance (RJA) of the NCV4276ADS50G in a standard PCB layout?
For the NCV4276ADS50G in DPAK-5 package, RJA is 100.9°C/W on a minimal pad board (0.26 in² copper) and 46.8°C/W on a 1-pad board (1.14 in² copper), per datasheet Table "THERMAL CHARACTERISTICS". Achieving the lower value requires ≥736 mm² (1.14 in²) of 1 oz copper connected to Pin 3 (GND/Heatsink).
How does the NCV4276ADS50G behave during cold-crank conditions when input voltage drops below 6 V?
During cold-crank, the NCV4276ADS50G maintains regulation down to VIN = VOUT + VDR = 5.0 V + 0.5 V = 5.5 V (max dropout). Below 5.5 V, output follows input with ~100 mV droop before dropout - verified in Figure 25. This behavior prevents system reset during brief 6–7 V cranking dips in 12 V vehicles.
NCV4276ADS50G 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):
- -
- Current - Output:
- 400mA
- Current - Quiescent (Iq):
- 200 µA
- Current - Supply (Max):
- 35 mA
- PSRR:
- 70dB (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
NCV4276ADS50G FAQ
1.How can I place an order for NCV4276ADS50G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV4276ADS50G 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 NCV4276ADS50G reliable?
The price and inventory of NCV4276ADS50G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV4276ADS50G is usually 5 days.
3.What payment methods are accepted for NCV4276ADS50G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV4276ADS50G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV4276ADS50G?
NCV4276ADS50G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV4276ADS50G 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 NCV4276ADS50G?
For technical support, including NCV4276ADS50G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV4276ADS50G requirements.
6.How does Aetrix verify that NCV4276ADS50G is sourced from the original manufacturer or authorized distributors?
All NCV4276ADS50G 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 NCV4276ADS50G meets industry standards.
7.What is the process for return or replacement of NCV4276ADS50G?
All NCV4276ADS50G units undergo pre-shipment inspection (PSI). If there is an issue with NCV4276ADS50G, 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 NCV4276ADS50G part is unused and in its original packaging.
Return procedure for NCV4276ADS50G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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