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onsemi NCV4274ST25T3G
- Part No.:
- NCV4274ST25T3G
- Manufacturer:
- onsemi
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
NCV4274ST25T3G.pdf
- Description:
- IC REG LINEAR 2.5V 400MA SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:4,624
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Product details
Overview
NCV4274ST25T3G from onsemi is a 4% accuracy, 2.5 V fixed-output automotive-grade linear voltage regulator in SOT-223 package, delivering up to 400 mA output current with 500 mV dropout at 250 mA, 150 µA quiescent current at 1 mA load, and AEC-Q100 qualification - used for powering microcontrollers and sensors in engine control units.
For engineers reviewing the NCV4274ST25T3G datasheet, pinout, applications, or equivalent options, key selection criteria include ±4% output tolerance, thermal shutdown at 165–210°C, reverse battery protection to −42 V, load dump survival up to +60 V, and compatibility with low-ESR ceramic output capacitors ≥2.2 µF.
Technical Context
This device implements a PNP-based linear regulation architecture with precision bandgap reference and error amplifier feedback. It features saturation control to maintain regulation during low-input conditions and integrates current limit sensing, thermal shutdown, and fault monitoring circuitry for automotive safety-critical operation.
Designed for harsh environments, the NCV4274ST25T3G withstands transient voltages up to +60 V and reverse battery conditions down to −42 V without external protection components. Its thermal shutdown threshold is guaranteed by design (165–210°C), and it supports stable operation with output capacitance as low as 2.2 µF and ESR ≤2.5 Ω across −40°C to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±4% (guaranteed over −40°C to +150°C, 4.5–40 V input) |
| Max Output Current | 400 mA continuous - sufficient for MCU core logic, CAN transceivers, and sensor interfaces |
| Dropout Voltage | 500 mV at 250 mA load - enables operation with minimal headroom (e.g., 3.0 V input → 2.5 V output) |
| Quiescent Current | 150 µA at 1 mA load - critical for always-on automotive modules with low standby power budgets |
| Input Voltage Range | 4.5 V to 40 V - covers cold-crank (≥4.5 V) and load-dump (≤40 V) conditions per ISO 7637-2 |
| Fault Protection | Reverse battery (−42 V), short-circuit, thermal overload, and +60 V transient - eliminates need for external TVS or diodes |
| Thermal Shutdown | 165–210°C junction temperature - protects die during sustained overload or poor heatsinking |
Pinout & Package
SOT-223 (TO-261, Case 318E) package with exposed tab for thermal conduction; 4-pin configuration where pins 2 and 4 are internally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input | Bypass directly at IC with ceramic capacitor to GND; handles up to 40 V DC + 60 V transients |
| 2, 4 | Ground | Common return path for input, output, and internal circuitry; pins 2 and 4 are internally tied |
| 3 | Output | Regulated 2.5 V supply; requires ≥2.2 µF ceramic capacitor with ESR ≤2.5 Ω for stability |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Qualified for automotive applications including engine bay and transmission control modules |
| ±4% output accuracy | Tighter than standard 5% regulators - ensures reliable logic-level compliance for 2.5 V I/O domains |
| Low quiescent current | 150 µA at 1 mA load - extends battery life in always-on vehicle subsystems (e.g., body control modules) |
| Integrated fault protection | Eliminates need for external reverse-polarity diode, TVS, or current-limiting resistors |
| Pb-free SOT-223 package | RoHS-compliant, MSL Level 3, reflow-compatible up to 265°C peak - suitable for automated assembly |
Applications
| Engine Control Unit (ECU) Power Rail | Body Control Module (BCM) Sensor Supply |
|---|---|
|
Use Scenario: Powers 2.5 V analog front-end and digital logic in gasoline/diesel engine ECUs under wide ambient and electrical stress. IC Role / Device Role / Timing Role: Primary 2.5 V LDO supplying crankshaft position sensor interface, ADC reference, and MCU I/O banks. Use Value: Survives −40°C to +150°C junction temperature and ISO 7637-2 Pulse 5a/b load dumps without reset or latch-up. |
Use Scenario: Supplies 2.5 V to door module sensors (window lift, lock actuator feedback, ambient light) in 12 V vehicle architectures. IC Role / Device Role / Timing Role: Low-quiescent, fault-tolerant regulator enabling <100 µA sleep-mode current in BCM standby state. Use Value: Reverse-battery immunity (−42 V) prevents damage during battery jump-start or incorrect installation. |
| Telematics Control Unit (TCU) Core Logic | Advanced Driver Assistance System (ADAS) Camera Interface |
|
Use Scenario: Provides clean 2.5 V rail for LTE modem baseband processor and GNSS receiver in connected vehicle telematics units. IC Role / Device Role / Timing Role: Secondary regulated supply decoupled from noisy 5 V system rail; supports fast load transient response. Use Value: 400 mA capability and 500 mV dropout enable direct step-down from 3.3 V intermediate rail, reducing thermal load. |
Use Scenario: Powers image signal processor (ISP) I/O and serializer interface in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Stable 2.5 V source for MIPI CSI-2 lane termination and pixel clock generation circuitry. Use Value: ±4% tolerance ensures compatibility with 2.5 V LVCMOS timing margins while rejecting ripple from switching DC/DC stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV4274AST25T3G | ±2% output accuracy (vs. ±4%); otherwise identical pinout, package, and specs | Required where tighter regulation is needed for precision ADC references or high-speed SerDes I/O | Select when 2.5 V rail must stay within ±50 mV over temperature and line variation |
| TLV73325PDBVR | Lower IQ (45 µA), lower max current (300 mA), no automotive qualification or load-dump rating | Suitable only for non-automotive industrial or consumer applications with benign supply conditions | Use only in non-safety-critical, non-automotive designs where cost and ultra-low IQ outweigh fault robustness |
Compared with NCV4274ST25T3G, NCV4274AST25T3G offers higher accuracy but same thermal and fault performance, while TLV73325PDBVR trades automotive ruggedness for lower quiescent current in benign environments.
Availability
NCV4274ST25T3G is available at Aetrix Electronics and suitable for automotive engine control, body electronics, telematics, and ADAS camera systems requiring stable component supply with full AEC-Q100 traceability and PPAP support.
Supply support for NCV4274ST25T3G 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, sensor, and automotive ICs with strong focus on functional safety and reliability.
The NCV4274 series belongs to onsemi's automotive-qualified linear regulator product line, designed specifically for demanding vehicle subsystems requiring high fault tolerance, wide temperature operation, and ISO/IEC 16949-compliant manufacturing.
FAQ
What is the maximum input voltage the NCV4274ST25T3G can withstand during load dump events?
The NCV4274ST25T3G is rated for +60 V peak transient voltage with respect to ground, meeting ISO 7637-2 Pulse 5a and 5b requirements for 12 V automotive systems. This allows direct connection to battery rails without external TVS clamping, provided layout minimizes inductance in the input path. The device remains functional and undamaged during such transients.
Does the NCV4274ST25T3G require an external capacitor on the input pin?
Yes, the NCV4274ST25T3G requires a ceramic bypass capacitor (typically 100 nF) placed directly between Pin 1 (Input) and Pin 2/4 (GND) to suppress high-frequency noise and damp potential oscillations caused by input line inductance. This capacitor must be located within 5 mm of the IC pins per the datasheet layout guidance.
Can the NCV4274ST25T3G be used in ambient temperatures below −40°C?
The NCV4274ST25T3G is specified for operation from −40°C to +150°C junction temperature, but ambient temperature limits depend on power dissipation and PCB thermal design. At −40°C ambient, the device remains functional if junction temperature stays ≥−40°C - achievable with moderate load current and adequate copper area under the exposed tab per JEDEC JESD51-7.
What is the minimum output capacitance required for stability with the NCV4274ST25T3G?
The NCV4274ST25T3G requires a minimum output capacitance of 2.2 µF with ESR ≤2.5 Ω for guaranteed stability across its operating range. For the 2.5 V version, the datasheet recommends ≥1 µF for basic functionality, but 2.2 µF ceramic is the validated minimum for all load and temperature conditions. Larger values improve transient response but do not harm stability.
Is the NCV4274ST25T3G pin-compatible with other variants in the NCV4274 family?
Yes, all NCV4274 variants - including NCV4274ST25T3G, NCV4274AST25T3G, NCV4274ST33T3G, and NCV4274AST33T3G - share identical SOT-223 pinout (Pin 1: Input, Pins 2&4: GND, Pin 3: Output) and thermal pad layout. Voltage and accuracy differences are implemented internally; no PCB redesign is needed when substituting within the same package.
NCV4274ST25T3G 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):
- 2.1V @ 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)
NCV4274ST25T3G FAQ
1.How can I place an order for NCV4274ST25T3G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV4274ST25T3G 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 NCV4274ST25T3G reliable?
The price and inventory of NCV4274ST25T3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV4274ST25T3G is usually 5 days.
3.What payment methods are accepted for NCV4274ST25T3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV4274ST25T3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV4274ST25T3G?
NCV4274ST25T3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV4274ST25T3G 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 NCV4274ST25T3G?
For technical support, including NCV4274ST25T3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV4274ST25T3G requirements.
6.How does Aetrix verify that NCV4274ST25T3G is sourced from the original manufacturer or authorized distributors?
All NCV4274ST25T3G 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 NCV4274ST25T3G meets industry standards.
7.What is the process for return or replacement of NCV4274ST25T3G?
All NCV4274ST25T3G units undergo pre-shipment inspection (PSI). If there is an issue with NCV4274ST25T3G, 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 NCV4274ST25T3G part is unused and in its original packaging.
Return procedure for NCV4274ST25T3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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