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onsemi NCV4276DS50R4G
- Part No.:
- NCV4276DS50R4G
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
NCV4276DS50R4G.pdf
- Description:
- IC REG LINEAR 5V 400MA D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,428
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Product details
Overview
NCV4276DS50R4G 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 engine control units, body electronics, and infotainment subsystems under harsh automotive transients.
For engineers reviewing the NCV4276DS50R4G 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 (10–22 µF) and ESR values.
Technical Context
The NCV4276DS50R4G uses a PNP series pass transistor controlled by a bandgap-referenced error amplifier to achieve low dropout and high stability across temperature and load. Its saturation control logic minimizes ground current during low-input or overload conditions while maintaining regulation down to VI = VQ + 0.5 V (minimum 4.5 V).
Inhibit functionality enables precise system-level power sequencing: output disables when INH < 0.5 V and enables when INH > 3.5 V. Fault protections include short-circuit current limiting (400–1100 mA trip range), thermal shutdown (150°C trigger), and robust ±42 V/±45 V reverse/peak transient immunity-critical for 12 V/24 V automotive battery rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±4% (4.8–5.2 V), specified over 5–400 mA load and −40°C to +150°C TJ. |
| Max Output Current | 400 mA continuous; current limit trips between 400–1100 mA depending on thermal condition. |
| Dropout Voltage | ≤500 mV at 250 mA load (VI − VQ), enabling operation with minimal headroom above 5.5 V input. |
| Input Voltage Range | 4.5 V to 40 V operating; withstands +45 V transient peaks and −42 V reverse polarity without damage. |
| Quiescent Current | 10 µA max in inhibit-off (sleep) mode; 10–35 mA at full 400 mA load, supporting low-power standby states. |
| Thermal Shutdown | Activates at 150°C junction temperature (design-guaranteed, not production-tested), protecting against sustained overload. |
| PSRR | ≥60 dB at 100 Hz, rejecting ripple from alternator or switching supply noise in vehicle power networks. |
Pinout & Package
DPAK-5 surface-mount package (Case 175AA, DS suffix), thermally enhanced with Pin 3 internally connected to heatsink. Designed for PCB copper area optimization: RJA = 100.9°C/W (min pad) or 46.8°C/W (1-pad board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I) | Input | Battery supply input; accepts 4.5–40 V DC with ±45 V transient and −42 V reverse voltage tolerance. |
| 2 (INH) | Inhibit Control | Active-high enable: output active when ≥3.5 V; disabled when ≤0.5 V; supports direct tie-to-input for always-on use. |
| 3 (GND) | Ground / Thermal Pad | Reference return and internal heatsink connection; must be soldered to large copper pour for thermal performance. |
| 4 (NC) | No Connect | Not connected in fixed 5.0 V version; unused terminal-no external circuitry required. |
| 5 (Q) | Regulated Output | 5.0 V output; bypassed with 22 µF capacitor to GND per Figure 3; stable with ESR 0.01–10 Ω. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualification | NCV prefix confirms AEC-Q100 compliance and manufacturing site/control changes for automotive reliability. |
| Wide Input Transient Tolerance | +45 V peak and −42 V reverse voltage protection eliminate need for external TVS or diode clamping in 12 V/24 V systems. |
| Low Quiescent Current | 10 µA sleep-mode current enables always-connected modules (e.g., CAN gateways) to meet ISO 11898-2 standby requirements. |
| Stable with Ceramic Capacitors | Validated with 10–22 µF X7R/X5R ceramics (e.g., GRM31CR71C106KAC7); eliminates electrolytic dependency for extended life. |
| Integrated Fault Protection | Combines current limit, thermal shutdown, and reverse-polarity survival-reducing BOM count vs. discrete protection solutions. |
Applications
| Engine Control Unit (ECU) Power | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Supplies 5.0 V to microcontroller, CAN transceivers, and sensor interfaces in gasoline/diesel engine compartments. IC Role / Device Role / Timing Role: Primary post-regulator delivering clean, fault-protected 5.0 V rail downstream of buck converter or alternator rectifier. Use Value: Withstands cranking dips (4.5 V min), load dump spikes (+45 V), and under-hood temperatures up to +150°C junction. |
Use Scenario: Powers door module MCUs, window lift drivers, and interior lighting controllers in vehicle body electronics. IC Role / Device Role / Timing Role: Local LDO providing isolated 5.0 V domain with independent enable/disable via vehicle network command. Use Value: Inhibit pin allows centralized power gating; 10 µA sleep current meets OEM requirements for <100 µA module standby draw. |
| Infotainment Head Unit | Advanced Driver Assistance Systems (ADAS) |
|
Use Scenario: Generates stable 5.0 V for audio DSPs, display timing controllers, and USB PHYs in center-stack infotainment systems. IC Role / Device Role / Timing Role: Low-noise, high-PSRR local regulator decoupling noisy switching supplies feeding sensitive analog/digital circuits. Use Value: 60 dB PSRR at 100 Hz suppresses alternator ripple; stable with low-ESR ceramic caps avoids aging-related failures in 10+ year lifecycles. |
Use Scenario: Supplies 5.0 V to radar MCU, camera ISP, and CAN FD transceivers in front/rear ADAS sensor nodes. IC Role / Device Role / Timing Role: Safety-critical power stage with thermal shutdown and current limiting to prevent single-point failure propagation. Use Value: 150°C thermal shutdown and AEC-Q100 qualification support ASIL-B functional safety decomposition for power domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV4276DT50R4G | D2PAK-5 package (Case 936A); lower RJA (41.6°C/W on 1.222 in² board) vs. DPAK's 46.8°C/W; identical electrical specs. | Better thermal performance for higher ambient or sustained 400 mA loads; requires larger PCB footprint and heatsink pad. | Select DT suffix when thermal margin is constrained and board space permits larger D2PAK layout. |
| TLV73350PDBVR | 300 mA output, 250 mV dropout at 300 mA, SOT-23-5 package; ±1% accuracy; no reverse-voltage or high-transient protection. | Lacks automotive-grade fault protection; suitable only for non-safety, non-battery-rail applications like consumer accessories. | Use only in benign environments where input is pre-conditioned; not a drop-in replacement for NCV4276DS50R4G in automotive designs. |
Compared with NCV4276DT50R4G, the NCV4276DS50R4G trades ~5°C/W higher thermal resistance for smaller DPAK footprint; versus TLV73350PDBVR, it provides essential automotive ruggedness-including reverse polarity survival and 45 V transient tolerance-that the TI part omits entirely.
Availability
NCV4276DS50R4G is available at Aetrix Electronics and suitable for engine control units, body control modules, and infotainment head units requiring stable component supply across automotive production lifecycles.
Supply support for NCV4276DS50R4G 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 NCV4276 family is part of onsemi's SMART REGULATOR® portfolio, engineered specifically for automotive power management with integrated fault protection, wide temperature operation, and AEC-Q100 qualification.
FAQ
What is the minimum input voltage required for NCV4276DS50R4G to regulate 5.0 V output?
The NCV4276DS50R4G requires a minimum input voltage of 4.5 V or (VQ + 0.5 V), whichever is greater. For its 5.0 V output, this means VI(min) = 5.5 V under normal operation. This ensures sufficient headroom for the 500 mV max dropout voltage while maintaining regulation across temperature and load.
Does NCV4276DS50R4G require an external voltage divider for 5.0 V operation?
No. The NCV4276DS50R4G is the fixed 5.0 V version of the NCV4276 family. Pin 4 is labeled NC (No Connect), and no external resistors are needed. Only the adjustable versions (e.g., NCV4276DSADJ) require an R1/R2 divider on the VA pin to set output voltage.
Can NCV4276DS50R4G survive reverse battery connection?
Yes. The NCV4276DS50R4G is rated for −42 V reverse input voltage, a key automotive requirement. It will not be damaged if the battery is accidentally connected backward, eliminating the need for an external series diode or MOSFET protection circuit in most implementations.
What output capacitor value and type are recommended for NCV4276DS50R4G?
onsemi recommends a 22 µF aluminum or tantalum capacitor, or a 10 µF X7R/X5R ceramic capacitor (e.g., Murata GRM31CR71C106KAC7) with ESR between 0.01 Ω and 10 Ω. Stability is confirmed across this range per Figures 5–8 in the datasheet, enabling reliable operation with modern low-ESR ceramics.
How does the inhibit function behave during power-up transients?
During fast input voltage slew rates (>30 V/s), the NCV4276DS50R4G remains inhibited until the INH pin reaches ≥3.5 V. This prevents uncontrolled output turn-on during cranking or jump-start events. Once stable, INH can be tied directly to VIN for permanent enable or driven by a microcontroller GPIO for sequenced power control.
NCV4276DS50R4G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- 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 @ 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
NCV4276DS50R4G FAQ
1.How can I place an order for NCV4276DS50R4G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV4276DS50R4G 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 NCV4276DS50R4G reliable?
The price and inventory of NCV4276DS50R4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV4276DS50R4G is usually 5 days.
3.What payment methods are accepted for NCV4276DS50R4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV4276DS50R4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV4276DS50R4G?
NCV4276DS50R4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV4276DS50R4G 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 NCV4276DS50R4G?
For technical support, including NCV4276DS50R4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV4276DS50R4G requirements.
6.How does Aetrix verify that NCV4276DS50R4G is sourced from the original manufacturer or authorized distributors?
All NCV4276DS50R4G 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 NCV4276DS50R4G meets industry standards.
7.What is the process for return or replacement of NCV4276DS50R4G?
All NCV4276DS50R4G units undergo pre-shipment inspection (PSI). If there is an issue with NCV4276DS50R4G, 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 NCV4276DS50R4G part is unused and in its original packaging.
Return procedure for NCV4276DS50R4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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