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onsemi NCV4276DS25R4G
- Part No.:
- NCV4276DS25R4G
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
NCV4276DS25R4G.pdf
- Description:
- IC REG LINEAR 2.5V 400MA D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,108
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Product details
Overview
NCV4276DS25R4G from onsemi is a 400 mA automotive-grade low-dropout linear regulator with fixed 2.5 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, short-circuit protection, and operates from −40°C to +150°C junction temperature in harsh automotive environments.
For engineers reviewing the NCV4276DS25R4G datasheet, pinout, applications, or equivalent options, this device is selected for engine control units, body electronics, and ADAS power rails where high input voltage resilience, precise low-voltage regulation, and AEC-Q100 compliance are required.
Technical Context
The NCV4276DS25R4G uses a PNP pass transistor controlled by a bandgap-referenced error amplifier to achieve ultra-low dropout and stable 2.5 V output across wide load (5–400 mA) and input voltage (4.5 V to 40 V) ranges. Its saturation control minimizes ground current under low-VIN or overload conditions.
It integrates fault protection including overcurrent limiting (400–1100 mA trip), thermal shutdown at 150°C (guaranteed by design), and reverse-input voltage tolerance down to −42 V - critical for 12 V/24 V automotive battery systems subject to load dump and polarity reversal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±4% (4.5 V ≤ VIN ≤ 40 V, 5–400 mA load); ensures stable logic supply for microcontrollers and sensors |
| Max Output Current | 400 mA continuous; supports multiple downstream ICs without external boost circuitry |
| Dropout Voltage | ≤500 mV at 250 mA (VIN = 5.0 V); enables operation with minimal headroom in low-battery scenarios |
| Input Voltage Range | −42 V to +45 V peak; withstands automotive load dump (ISO 7637-2 Pulse 5a) and reverse-battery connection |
| Quiescent Current | ≤10 µA in inhibit-off (sleep) mode; reduces standby power in always-on vehicle modules |
| Junction Temp Range | −40°C to +150°C; qualified for under-hood and transmission-control applications per AEC-Q100 |
| Thermal Resistance | RθJA = 46.8°C/W (1-pad board); enables 1.5 W dissipation with <100°C rise at 25°C ambient |
Pinout & Package
D2PAK-5 (TO-263-5) surface-mount package with exposed tab thermally connected to Pin 3 (GND); case code 936A, DS suffix; 5-pin layout optimized for high-current automotive PCB layouts with integrated heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I) | Battery input supply | Accepts −42 V to +45 V transients; requires ≥1 µF bulk + 100 nF ceramic input decoupling |
| 2 (INH) | Inhibit control input | Logic-low (<0.5 V) disables output; logic-high (>2.8 V) enables regulation; compatible with MCU GPIO |
| 3 (GND) | Ground / heatsink connection | Internally bonded to exposed metal tab; must be soldered to large copper pour for thermal management |
| 4 (NC) | No-connect (fixed-output version) | Not internally connected; left unconnected per datasheet; not used for 2.5 V fixed variant |
| 5 (Q) | Regulated 2.5 V output | Requires ≥22 µF output capacitor (low-ESR aluminum or ceramic); stability depends on ESR range per Fig. 5–8 |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (−40°C to +125°C ambient) with NCV prefix; validated for engine bay and chassis applications |
| Reverse voltage protection | Withstands −42 V applied to Pin 1 without damage or latch-up; eliminates need for external series diode |
| Inhibit-controlled enable | Low-power disable state draws ≤10 µA; allows system-level power sequencing and sleep-mode current reduction |
| Wide input operating range | Functions from 4.5 V (VOUT + 0.5 V) up to 40 V; supports 12 V and 24 V battery architectures without external regulators |
| Stable with broad capacitor ESR | Compatible with 0.01–10 Ω ESR output capacitors (22 µF); simplifies BOM and enables use of cost-effective electrolytics |
Applications
| Engine Control Unit (ECU) Power Rail | Advanced Driver Assistance Systems (ADAS) |
|---|---|
|
Use Scenario: Supplies 2.5 V to microcontroller core logic and CAN transceivers in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Primary LDO for safety-critical domain controller; provides clean, regulated bias independent of battery fluctuations. Use Value: −42 V to +45 V input tolerance prevents failure during cranking, load dump, or jump-start events. |
Use Scenario: Powers image signal processors and radar MMIC bias in front-camera and surround-view modules. IC Role / Device Role / Timing Role: Local point-of-load regulator delivering stable 2.5 V to high-speed analog front-ends. Use Value: 500 mV dropout enables reliable operation down to 3.0 V battery voltage during cold-cranking. |
| Body Control Module (BCM) | Infotainment System Power Management |
|
Use Scenario: Regulates 2.5 V for door module MCUs, LIN transceivers, and LED drivers. IC Role / Device Role / Timing Role: Secondary LDO in distributed power architecture; enables localized regulation near loads. Use Value: 400 mA output current supports multi-peripheral integration without external pass devices. |
Use Scenario: Supplies 2.5 V to audio codecs and display timing controllers in head-unit designs. IC Role / Device Role / Timing Role: Low-noise auxiliary regulator isolated from noisy DC-DC switching rails. Use Value: Bandgap reference and PSRR >60 dB at 100 Hz suppress ripple from upstream buck converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV4276DT25R4G | DPAK-5 package (case 175AA); RθJA = 100.9°C/W (min-pad) vs. 74.8°C/W for D2PAK; lower thermal performance at high load | Suitable for space-constrained PCBs where thermal mass is limited; requires larger copper area to match D2PAK thermal capability | Select when board area is prioritized over thermal margin; verify junction temperature rise under worst-case load/ambient |
| TLV73325PDBVR | 300 mA output, 2.5 V ±1%, 170 mV dropout at 300 mA; no reverse-voltage or high-transient protection; SOT-23-5 | Targeted at consumer/portable applications; lacks automotive qualification and fault robustness | Use only in non-automotive, low-risk systems where cost and size outweigh transient resilience requirements |
Compared with NCV4276DT25R4G, the NCV4276DS25R4G delivers superior thermal performance and higher surge tolerance; versus TLV73325PDBVR, it trades higher quiescent current for full automotive ruggedness, making it irreplaceable in safety-critical vehicle subsystems.
Availability
NCV4276DS25R4G is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, and body electronics requiring stable component supply across extended automotive production lifecycles.
Supply support for NCV4276DS25R4G 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, with deep expertise in automotive, industrial, and cloud power solutions.
The NCV4276 family was designed specifically for automotive power management - delivering rugged, AEC-Q100-qualified LDOs that survive harsh electrical environments while maintaining precision regulation.
FAQ
What is the maximum input voltage the NCV4276DS25R4G can withstand without damage?
The NCV4276DS25R4G supports −42 V reverse voltage and +45 V peak transient voltage on the input pin (Pin 1). These ratings are absolute maximum stress limits - sustained operation above 40 V input is not recommended. The device remains functional within its operating range of 4.5 V to 40 V, and these extreme ratings ensure survival during ISO 7637-2 load dump pulses and accidental battery reversal.
Does the NCV4276DS25R4G require an external voltage divider for 2.5 V output?
No, the NCV4276DS25R4G is the fixed 2.5 V version - Pin 4 (VA) is internally disconnected (NC) and must remain unconnected. External resistors are only required for the adjustable version (e.g., NCV4276DSADJR4G). Using a voltage divider on Pin 4 of the NCV4276DS25R4G will not alter the output and may impair stability or cause malfunction.
How does the inhibit (INH) pin behave during power-up?
During startup, the NCV4276DS25R4G remains disabled if the INH pin voltage rises slower than 30 V/s - preventing false turn-on during noisy transients. The output enables only when INH exceeds 2.8 V (typical) and disables when INH falls below 1.7 V (typical). This hysteresis ensures robust noise immunity in automotive wiring harnesses.
Can the NCV4276DS25R4G be used with ceramic output capacitors?
Yes, the NCV4276DS25R4G is stable with low-ESR ceramic capacitors (e.g., 22 µF X7R 1210), but the minimum ESR must be observed per Figure 5: 0.01–10 Ω for 22 µF. For optimal transient response and stability, Murata GRM32ER71C226KE18 is validated. Avoid ultra-low-ESR ceramics (<1 mΩ) without series resistance unless bypass capacitor Cb is added per Figure 4.
What thermal derating applies to the NCV4276DS25R4G at 125°C ambient?
At 125°C ambient, the NCV4276DS25R4G's maximum allowable power dissipation drops to ~0.8 W (using RθJA = 46.8°C/W and TJMAX = 150°C). For 2.5 V output and 400 mA load, this corresponds to a maximum input voltage of ~5.5 V. Higher input voltages require reduced load current or enhanced PCB copper to maintain safe junction temperature.
NCV4276DS25R4G 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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 2.1V @ 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
NCV4276DS25R4G FAQ
1.How can I place an order for NCV4276DS25R4G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV4276DS25R4G 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 NCV4276DS25R4G reliable?
The price and inventory of NCV4276DS25R4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV4276DS25R4G is usually 5 days.
3.What payment methods are accepted for NCV4276DS25R4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV4276DS25R4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV4276DS25R4G?
NCV4276DS25R4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV4276DS25R4G 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 NCV4276DS25R4G?
For technical support, including NCV4276DS25R4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV4276DS25R4G requirements.
6.How does Aetrix verify that NCV4276DS25R4G is sourced from the original manufacturer or authorized distributors?
All NCV4276DS25R4G 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 NCV4276DS25R4G meets industry standards.
7.What is the process for return or replacement of NCV4276DS25R4G?
All NCV4276DS25R4G units undergo pre-shipment inspection (PSI). If there is an issue with NCV4276DS25R4G, 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 NCV4276DS25R4G part is unused and in its original packaging.
Return procedure for NCV4276DS25R4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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