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onsemi NCV4276DS18R4G
- Part No.:
- NCV4276DS18R4G
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
NCV4276DS18R4G.pdf
- Description:
- IC REG LINEAR 1.8V 400MA D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,222
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Product details
Overview
NCV4276DS18R4G from onsemi is a 400 mA automotive-grade low-dropout linear regulator with fixed 1.8 V output, ±4% accuracy, 500 mV max dropout (at 250 mA), −42 V reverse voltage protection, and +45 V peak transient tolerance. It features inhibit control, thermal shutdown, overcurrent protection, and operates from −40°C to +150°C junction temperature in harsh vehicle environments such as engine control units and body electronics.
For engineers reviewing the NCV4276DS18R4G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, validated DPAK-5 package mapping, real-world stability guidance for 22 µF output capacitors, and two confirmed automotive-grade alternatives with documented voltage accuracy and thermal performance differences.
Technical Context
The NCV4276DS18R4G uses a PNP pass transistor controlled by a bandgap-referenced error amplifier to achieve low dropout and stable regulation. Its saturation control logic minimizes ground current at low input voltages and high loads, while internal current limit and thermal shutdown circuits activate at ≥150°C junction temperature.
It supports wide input operation from (VQ + 0.5 V) or 4.5 V (whichever is higher) up to 40 V, with reverse input voltage protection down to −42 V and transient tolerance up to +45 V - critical for 12 V/24 V automotive battery systems subject to load dump and cold crank events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±4% (4.5–40 V input range; validated across −40°C to +150°C) |
| Max Output Current | 400 mA continuous; current limiting activates at 400–1100 mA depending on thermal condition |
| Dropout Voltage | ≤500 mV at 250 mA load (VI = 4.5 V); enables regulation even during cold-crank battery dips |
| Input Voltage Range | −42 V to +45 V (survives reverse battery connection and ISO 7637-2 pulse 5a) |
| Quiescent Current | ≤10 µA in inhibit sleep mode; ≤35 mA at 400 mA load (low system standby power) |
| Thermal Shutdown | Activates at 150°C junction temperature; guaranteed design limit (not production tested) |
| PSRR | ≥60 dB at 100 Hz (suppresses alternator ripple and switching noise coupling) |
Pinout & Package
DPAK-5 surface-mount package (Case 175AA, DS suffix), thermally enhanced with Pin 3 internally connected to heatsink. Designed for PCB copper pour thermal management per JEDEC standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I) | Input Supply | Battery rail input; accepts −42 V to +45 V transients; requires CI1 (1 µF) and CI2 (100 nF) decoupling |
| 2 (INH) | Inhibit Control | Active-low enable: <0.5 V disables output; >3.5 V enables (NCV4276 version); controls system-level power sequencing |
| 3 (GND) | Ground / Heatsink | Internal connection to exposed tab; must be soldered to large copper area for thermal dissipation (RJA = 100.9°C/W min pad) |
| 4 (NC) | No Connect | Not bonded; left floating in fixed-output 1.8 V variant (DS18R4G); not used for feedback |
| 5 (Q) | Regulated Output | 1.8 V output; requires CQ = 22 µF low-ESR capacitor to GND for stability (see Fig. 3 & Regulator Stability section) |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualification | NCV prefix confirms AEC-Q100 qualification for engine bay and chassis applications |
| Reverse Battery Protection | Withstands −42 V applied to input without damage or latch-up - eliminates need for external diode |
| Load Transient Response | Stable with 22 µF output capacitor and ESR between 0.01–10 Ω (Fig. 7); supports fast digital load steps |
| Inhibit-Controlled Sleep Mode | Reduces quiescent current to ≤10 µA when INH <0.5 V - extends battery life in always-on modules |
| Pb-Free Construction | RoHS-compliant packaging (DPAK-5, matte tin lead finish) for global automotive supply chains |
Applications
| Engine Control Unit (ECU) Sensor Power | Body Control Module (BCM) Microcontroller Core |
|---|---|
Use Scenario: Powers 1.8 V I/O or core rails of automotive microcontrollers (e.g., S32K, RH850) in engine compartments where ambient temperatures reach 125°C. IC Role / Device Role / Timing Role: Primary LDO supplying regulated 1.8 V to MCU core logic under dynamic load conditions and battery voltage transients. Use Value: Maintains regulation during cold-crank (4.5 V min) and load dump (+45 V), eliminating need for external TVS or reverse-protection diodes. | Use Scenario: Supplies 1.8 V to CAN transceiver interfaces and LIN bus controllers in door modules and lighting ECUs. IC Role / Device Role / Timing Role: Low-noise, fault-protected power source for communication peripherals requiring precise voltage and fast enable/disable control. Use Value: Inhibit pin allows synchronized power-down with vehicle sleep/wake cycles, reducing system standby current to <10 µA. |
| Advanced Driver Assistance Systems (ADAS) Camera Module | Electric Power Steering (EPS) Motor Control Logic |
Use Scenario: Powers image sensor analog front-end and ISP core in rear-view or surround-view cameras mounted near exhaust or under-hood. IC Role / Device Role / Timing Role: Stable 1.8 V bias for high-speed ADCs and SerDes PHYs operating at junction temperatures up to 150°C. Use Value: Bandgap reference and PNP architecture ensure <0.5 mV/K output drift - preserves sensor gain calibration across temperature extremes. | Use Scenario: Supplies 1.8 V logic for motor gate drivers and position-sensing circuitry in EPS control units subjected to vibration and thermal cycling. IC Role / Device Role / Timing Role: Fault-tolerant regulator with integrated overtemperature and short-circuit protection for safety-critical subsystems. Use Value: Thermal shutdown at 150°C prevents thermal runaway during motor stall conditions while maintaining ASIL-B compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV4276DS25R4G | Fixed 2.5 V output, same ±4% accuracy, identical DPAK-5 package and thermal specs | Used where 2.5 V logic or analog rails are required instead of 1.8 V; no change to PCB layout or thermal design | Select when system requires 2.5 V instead of 1.8 V - identical footprint, pinout, and protection features |
| TLV73318PDBVR | 1.8 V ±1% accuracy, 300 mA output, SOT-23-5 package, no reverse-voltage or high-transient protection | Limited to infotainment or non-safety domains; lacks automotive transient robustness and thermal rating | Only suitable for cost-sensitive, non-automotive applications with benign supply conditions and <300 mA load |
Compared with NCV4276DS18R4G, NCV4276DS25R4G offers identical automotive robustness but targets 2.5 V systems, while TLV73318PDBVR trades protection and thermal capability for smaller size and tighter voltage tolerance - making it unsuitable for under-hood use.
Availability
NCV4276DS18R4G is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering applications requiring stable component supply across extended temperature ranges and automotive lifecycle requirements.
Supply support for NCV4276DS18R4G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV4276 family is part of onsemi's automotive power management portfolio, designed specifically for harsh-environment voltage regulation in engine, chassis, and safety-critical electronic control units.
FAQ
What is the maximum input voltage the NCV4276DS18R4G can withstand without damage?
The NCV4276DS18R4G is rated for −42 V reverse input voltage and +45 V peak transient input voltage. These ratings are absolute maximum stress limits - sustained operation above 40 V input is not recommended. The device survives ISO 7637-2 Pulse 5a (load dump) and reverse-battery conditions without external protection components, making it suitable for direct battery connection in 12 V and 24 V automotive systems.
Does the NCV4276DS18R4G require an external capacitor on the INH pin for noise immunity?
No, the NCV4276DS18R4G does not require an external capacitor on the INH pin. Its inhibit input has built-in hysteresis and is designed to tolerate noisy automotive environments. The datasheet specifies valid logic thresholds: output disables when INH <0.5 V and enables when INH >3.5 V (NCV4276 version). Adding capacitance may slow response and is unnecessary unless system-level EMI filtering is separately required.
Can the NCV4276DS18R4G be used with ceramic output capacitors?
Yes, the NCV4276DS18R4G is stable with ceramic output capacitors - specifically 22 µF X7R/X5R types such as Murata GRM32ER71C226KE18. Figure 7 in the datasheet defines the stable ESR range (0.01–10 Ω) for 1.8 V and 2.5 V fixed versions. Ceramic caps meet this requirement and improve transient response versus aluminum electrolytics, but must be paired with appropriate PCB layout (short traces, solid ground plane) to maintain stability.
What is the thermal resistance (RJA) of the NCV4276DS18R4G in a standard DPAK layout?
In a standard DPAK-5 layout with 1 oz copper and 0.26 in² (168 mm²) pad area, the NCV4276DS18R4G has RJA = 100.9°C/W. With increased copper area (1.14 in² / 736 mm²), RJA improves to 46.8°C/W. These values assume JEDEC-standard board construction and are critical for calculating maximum power dissipation: PDmax = (150°C − TA) / RJA. Derating is required above 125°C ambient.
Is the NCV4276DS18R4G pin-compatible with other NCV4276 variants like the adjustable version?
No, the NCV4276DS18R4G is not pin-compatible with the adjustable version (e.g., NCV4276ADR2G). While both use DPAK-5 packages, Pin 4 is NC (no connect) in the DS18R4G fixed 1.8 V variant but functions as VA (voltage adjust) in the adjustable version. Swapping them without PCB modification will result in incorrect or no output voltage. Always verify pin function tables - not just package outline - before substitution.
NCV4276DS18R4G 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 2.772V @ 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
NCV4276DS18R4G FAQ
1.How can I place an order for NCV4276DS18R4G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV4276DS18R4G 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 NCV4276DS18R4G reliable?
The price and inventory of NCV4276DS18R4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV4276DS18R4G is usually 5 days.
3.What payment methods are accepted for NCV4276DS18R4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV4276DS18R4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV4276DS18R4G?
NCV4276DS18R4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV4276DS18R4G 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 NCV4276DS18R4G?
For technical support, including NCV4276DS18R4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV4276DS18R4G requirements.
6.How does Aetrix verify that NCV4276DS18R4G is sourced from the original manufacturer or authorized distributors?
All NCV4276DS18R4G 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 NCV4276DS18R4G meets industry standards.
7.What is the process for return or replacement of NCV4276DS18R4G?
All NCV4276DS18R4G units undergo pre-shipment inspection (PSI). If there is an issue with NCV4276DS18R4G, 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 NCV4276DS18R4G part is unused and in its original packaging.
Return procedure for NCV4276DS18R4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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