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onsemi NCV4274AST25T3G
- Part No.:
- NCV4274AST25T3G
- Manufacturer:
- onsemi
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
NCV4274AST25T3G.pdf
- Description:
- IC REG LINEAR 2.5V 400MA SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:3,386
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Product details
Overview
NCV4274AST25T3G from onsemi is an automotive-grade, 2.5 V fixed-output linear voltage regulator with ±2.0% output accuracy, 400 mA output current capability, and a maximum dropout voltage of 500 mV at 250 mA load. It features low quiescent current (140 µA at 1 mA load), reverse-battery protection (−42 V), +60 V transient tolerance, and thermal shutdown. It is used in automotive body control modules and battery-powered microprocessor systems requiring stable low-voltage supply.
For engineers reviewing the NCV4274AST25T3G datasheet, pinout, applications, or equivalent options, key selection criteria include output accuracy, dropout performance under high-temperature operation, fault protection robustness for 12 V/24 V automotive environments, and SOT-223 thermal resistance (RθJA = 169.7 °C/W).
Technical Context
The NCV4274AST25T3G employs a PNP pass transistor architecture with precision bandgap reference and error amplifier feedback, enabling tight regulation across −40 °C to +150 °C junction temperature. Its saturation control prevents over-saturation during low-input conditions, maintaining regulation down to VI = 4.5 V.
It integrates current-limit sensing, thermal shutdown (trip at 165–210 °C), short-circuit protection, and ESD resilience (4 kV HBM). The device meets AEC-Q100 Grade 1 requirements and supports PPAP, confirming suitability for safety-critical automotive power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±2.0% (guaranteed over full temperature and load range; enables precise logic-level supply for MCU I/O or sensor interfaces) |
| Max Output Current | 400 mA (supports mid-power automotive ECUs without external boost stages) |
| Dropout Voltage | 500 mV at 250 mA (allows operation with input as low as 3.0 V, critical during cold-crank transients) |
| Quiescent Current | 140 µA at 1 mA load (minimizes standby power loss in always-on vehicle networks) |
| Input Voltage Range | 4.5 V to 40 V (covers 12 V and 24 V automotive systems including load dump up to +60 V peak) |
| Thermal Shutdown | 165–210 °C (design-guaranteed trip range protects die during sustained overload or poor heatsinking) |
| ESD Rating | 4 kV HBM (meets AEC-Q100-002, ensures robustness during board handling and assembly) |
Pinout & Package
SOT-223 (TO-261) package, 4-pin, surface-mount, Pb-free, with exposed thermal tab (pin 4). Pin 1: Input; pins 2 & 4: Ground; pin 3: Output.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input | Bypass directly at IC with ceramic capacitor to GND; must handle up to +60 V transient and −42 V reverse polarity |
| 2, 4 | Ground | Common return path for input, output, and internal circuitry; pin 4 is thermal tab-must be soldered to PCB copper for thermal management |
| 3 | Output | Regulated 2.5 V supply; requires ≥1 µF output capacitor (low-ESR ceramic or tantalum) for stability per Figure 3 |
Key Features
| Feature | Design Value |
|---|---|
| ±2.0% output accuracy | Enables direct powering of 2.5 V logic without post-regulation trimming or calibration in production |
| +60 V / −42 V fault tolerance | Survives ISO 7637-2 pulse 5a (load dump) and reverse-battery connection without external protection diodes |
| Low 140 µA quiescent current | Reduces parasitic drain on vehicle battery during ignition-off states, extending sleep-mode duration |
| AEC-Q100 Grade 1 qualified | Validated for operation from −40 °C to +125 °C ambient (150 °C junction), meeting OEM power-rail requirements |
| Integrated thermal shutdown | Prevents permanent damage during sustained overload or inadequate PCB copper area (≥5 mm² recommended) |
Applications
| Body Control Module (BCM) | Automotive Infotainment Power Rail |
|---|---|
Use Scenario: Supplies 2.5 V to CAN transceiver bias circuits and EEPROM interfaces in centralized vehicle body controllers. IC Role / Device Role / Timing Role: Primary low-noise, fault-tolerant LDO delivering stable voltage to communication peripherals during engine cranking and load dump events. Use Value: Eliminates need for discrete TVS and reverse-polarity protection, reducing BOM count by two components while maintaining AEC-Q100 compliance. |
Use Scenario: Powers audio codec analog front-end and touch controller I/O in head unit designs. IC Role / Device Role / Timing Role: Secondary regulated rail decoupled from noisy main 5 V domain, minimizing PSRR-induced noise coupling into sensitive analog paths. Use Value: 60 dB PSRR at 100 Hz ensures clean 2.5 V supply even when sourced from switched DC/DC with ripple, preserving SNR in audio signal chain. |
| Telematics Control Unit (TCU) | ADAS Camera Module Power |
Use Scenario: Provides 2.5 V bias to GNSS RF front-end LNA and secure element in cellular-connected TCU modules. IC Role / Device Role / Timing Role: Always-on regulator supporting fast wake-from-sleep functionality with sub-200 µA quiescent draw. Use Value: Enables <10 µA system-level standby current when paired with enable-controlled upstream buck converter, meeting UNECE R155 cybersecurity power budgets. |
Use Scenario: Supplies image sensor interface logic and ISP core voltage in rear-view or surround-view camera ECUs. IC Role / Device Role / Timing Role: Low-dropout regulator maintaining 2.5 V output during 6 V cold-crank dips, preventing sensor reset or frame loss. Use Value: 500 mV dropout at 250 mA ensures uninterrupted operation down to VIN = 3.0 V, exceeding ISO 16750-2 cold-cranking requirement (6.0 V min for 12 V systems). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73325PDBVR | 2.5 V ±1.0%, 300 mA, 170 mV dropout, no reverse-battery or load-dump protection | Consumer/portable electronics only; lacks AEC-Q100 qualification and automotive fault robustness | Choose only for non-automotive, space-constrained designs where ultra-low dropout and tighter accuracy outweigh protection needs |
| TPS7B8725QKVURQ1 | 2.5 V ±1.0%, 500 mA, 300 mV dropout, integrated enable, AEC-Q100 Grade 0 (−40 °C to +150 °C) | Higher current, lower dropout, but requires external reverse-polarity protection diode for −42 V rating | Select when higher output current and tighter accuracy are required, and layout allows adding Schottky protection diode |
Compared with TLV73325PDBVR and TPS7B8725QKVURQ1, the NCV4274AST25T3G trades slightly higher dropout and looser accuracy for fully integrated automotive-grade fault protection-eliminating external components and simplifying validation for OEM Tier 1 suppliers.
Availability
NCV4274AST25T3G is available at Aetrix Electronics and suitable for automotive body control modules, telematics units, and ADAS camera power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for NCV4274AST25T3G 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, and sensor solutions for automotive, industrial, and cloud infrastructure markets.
The NCV4274 series belongs to onsemi's automotive-qualified linear regulator product line, designed specifically to replace legacy 78xx-style regulators in harsh-temperature, high-reliability vehicle subsystems while integrating robust fault protection.
FAQ
What is the maximum input voltage the NCV4274AST25T3G can withstand during load dump events?
The NCV4274AST25T3G is rated for +60 V peak transient voltage with respect to ground, per AEC-Q100 stress testing. This rating covers ISO 7637-2 Pulse 5a load dump events in 12 V automotive systems. Operation above 40 V DC is not permitted, but the device survives short-duration transients up to +60 V without latch-up or damage-ensuring reliability in real-world vehicle electrical environments. The NCV4274AST25T3G does not require external TVS clamping for standard load dump compliance.
Does the NCV4274AST25T3G require an external capacitor on the input pin?
Yes, the NCV4274AST25T3G requires a minimum 100 nF ceramic capacitor placed directly between pin 1 (Input) and pin 2/4 (Ground), as shown in Figure 2 of the datasheet. This input capacitor stabilizes the regulator against line reactance and damps potential oscillations caused by PCB trace inductance. Omitting it may cause instability or increased output ripple, especially in high-current or high-frequency switching environments adjacent to the regulator. The NCV4274AST25T3G datasheet specifies CI = 100 nF as mandatory for reliable operation.
Can the NCV4274AST25T3G operate with an input voltage below 4.5 V?
No-the NCV4274AST25T3G has a specified minimum input voltage of 4.5 V for the 2.5 V version, as defined in the Operating Range table (page 19). Below 4.5 V, regulation is not guaranteed: output voltage drops, dropout behavior becomes undefined, and internal circuitry may cease functioning. During cold-crank events where battery voltage dips to 3.0 V, the NCV4274AST25T3G will cease regulation-but its 500 mV dropout at 250 mA means it sustains output down to VIN = 3.0 V *only if* load current is reduced proportionally. Full 400 mA output requires ≥4.5 V input.
Is the thermal pad (pin 4) of the NCV4274AST25T3G electrically connected to ground?
Yes-pin 4 of the NCV4274AST25T3G is internally connected to ground and serves as both the electrical ground terminal and the primary thermal conduction path. Per the SOT-223 mechanical drawing (Case 318E), pin 4 is the exposed tab and must be soldered to a minimum 5 mm² copper pour on the PCB for effective heat dissipation. Failure to connect pin 4 to ground compromises both electrical integrity (ground loop formation) and thermal performance (RθJA degrades from 169.7 °C/W to >200 °C/W), risking thermal shutdown under moderate load.
How does the NCV4274AST25T3G handle reverse battery connection?
The NCV4274AST25T3G is rated for −42 V reverse input voltage, meaning it withstands full battery reversal without damage or latch-up. This protection is implemented internally via integrated reverse-battery circuitry-no external diode is needed. During reverse connection, the device blocks current flow and remains in a safe, non-conducting state until normal polarity is restored. This feature is validated per AEC-Q100 stress test conditions and eliminates the need for external protection components in automotive harness designs where reverse jump-start risk exists. The NCV4274AST25T3G maintains this rating across its full operating temperature range.
NCV4274AST25T3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 2.05V @ 250mA
- Current - Output:
- 400mA
- Current - Quiescent (Iq):
- 250 µA
- Current - Supply (Max):
- 45 mA
- PSRR:
- 60dB (100Hz)
- Control Features:
- -
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223 (TO-261)
NCV4274AST25T3G FAQ
1.How can I place an order for NCV4274AST25T3G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV4274AST25T3G 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 NCV4274AST25T3G reliable?
The price and inventory of NCV4274AST25T3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV4274AST25T3G is usually 5 days.
3.What payment methods are accepted for NCV4274AST25T3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV4274AST25T3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV4274AST25T3G?
NCV4274AST25T3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV4274AST25T3G 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 NCV4274AST25T3G?
For technical support, including NCV4274AST25T3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV4274AST25T3G requirements.
6.How does Aetrix verify that NCV4274AST25T3G is sourced from the original manufacturer or authorized distributors?
All NCV4274AST25T3G 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 NCV4274AST25T3G meets industry standards.
7.What is the process for return or replacement of NCV4274AST25T3G?
All NCV4274AST25T3G units undergo pre-shipment inspection (PSI). If there is an issue with NCV4274AST25T3G, 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 NCV4274AST25T3G part is unused and in its original packaging.
Return procedure for NCV4274AST25T3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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