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onsemi NCV4274ADT33RKG
- Part No.:
- NCV4274ADT33RKG
- Manufacturer:
- onsemi
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
NCV4274ADT33RKG.pdf
- Description:
- IC REG LINEAR 3.3V 400MA DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,536
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Product details
Overview
NCV4274ADT33RKG from onsemi is an automotive-grade, 2% accurate, 3.3 V fixed-output linear voltage regulator in DPAK package, delivering up to 400 mA output current with 500 mV max 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 and body electronics.
For engineers reviewing the NCV4274ADT33RKG datasheet, pinout, applications, or equivalent options, key selection criteria include ±2% output accuracy over −40°C to +150°C, reverse-battery and load-dump transient tolerance (−42 V / +60 V), thermal shutdown at 165–210°C, and low-quiescent-current operation in battery-sensitive systems.
Technical Context
The NCV4274ADT33RKG employs a PNP pass transistor architecture with precision bandgap reference and error amplifier feedback, enabling stable regulation under low-input-voltage conditions via saturation control. Its design integrates internal current limiting, thermal overload protection, and fault signaling through safe operating area monitoring.
It operates across input voltages from 4.5 V to 40 V, supports output capacitor ESR ranges down to 0.1 Ω (for 2.5 V version) or 2.5 Ω (for 3.3 V/5.0 V/8.5 V versions), and maintains stability with ≥2.2 µF ceramic or electrolytic output capacitance - critical for automotive cold-crank and load-dump immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±2% (guaranteed over −40°C to +150°C junction temperature) |
| Max Output Current | 400 mA - sufficient to power dual-core automotive MCUs or multiple CAN transceivers |
| Dropout Voltage | ≤500 mV at 250 mA load - enables operation during 6 V cold-crank battery conditions |
| Quiescent Current | 150 µA at 1 mA load - minimizes standby power loss in always-on vehicle modules |
| Input Voltage Range | 4.5 V to 40 V - covers full automotive battery range including 24 V commercial vehicles |
| Fault Protection | Reverse-battery (−42 V), load dump (+60 V), short-circuit, and thermal shutdown - meets ISO 7637-2 pulse 5a requirements |
| Thermal Shutdown | 165°C to 210°C (design-guaranteed) - prevents die damage during sustained overload |
Pinout & Package
DPAK (TO-252-3) package: thermally enhanced surface-mount outline with exposed tab (pin 2/4) for PCB heat sinking; footprint compatible with JEDEC MS-012AC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Input) | Regulator input supply | Connect directly to bulk input capacitor (≥100 nF ceramic) to suppress high-frequency noise and line transients |
| 2,4 (Ground) | Power ground return path | Exposed tab serves as primary thermal and electrical ground - must be soldered to ≥5 mm² copper pour for RθJA ≤70°C/W |
| 3 (Output) | Regulated 3.3 V output | Requires ≥10 µF output capacitor (low-ESR aluminum or ceramic) for load-transient stability and startup delay control |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for −40°C to +125°C ambient (150°C junction), supporting under-hood deployment without derating |
| Pb-free and RoHS compliant | Meets J-STD-020C MSL1 reflow profile (peak 265°C), suitable for lead-free SMT assembly |
| Load-dump survivability | Withstands +60 V transients per ISO 7637-2 Pulse 5a - eliminates need for external TVS in most ECU designs |
| Reverse-battery protection | Operates safely at −42 V input - prevents latch-up and gate oxide damage during battery misconnection |
| Low-temperature stability | Maintains ±2% output accuracy down to −40°C - enables reliable cold-start operation in northern climates |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers 32-bit ARM-based MCU, CAN FD transceiver, and analog sensor interface in gasoline/diesel engine management system. IC Role / Device Role / Timing Role: Primary 3.3 V domain regulator supplying core logic, communication peripherals, and ADC reference. Use Value: 500 mV dropout ensures uninterrupted operation during 6–7 V cold-crank events; ±2% accuracy guarantees consistent ADC conversion and PWM timing. |
Use Scenario: Supplies door module microcontroller, LIN transceiver, and window motor driver IC in centralized body electronics architecture. IC Role / Device Role / Timing Role: System-level 3.3 V rail generator with watchdog reset coordination and wake-up signal conditioning. Use Value: 150 µA quiescent current extends battery life during 14-day sleep mode; −42 V reverse-battery tolerance prevents field returns from service errors. |
| Advanced Driver Assistance Systems (ADAS) Camera ECU | Telematics Control Unit (TCU) |
Use Scenario: Provides clean 3.3 V bias to image signal processor (ISP), MIPI CSI-2 serializer, and real-time clock in front-facing ADAS camera. IC Role / Device Role / Timing Role: Low-noise post-regulator decoupling the ISP core from noisy 5 V switching supply. Use Value: 60 dB PSRR at 100 Hz suppresses switching ripple from upstream DC-DC; thermal shutdown prevents thermal runaway during extended parking-mode recording. |
Use Scenario: Regulates 3.3 V rail for LTE modem, GNSS receiver, and secure element in cellular-connected vehicle telematics unit. IC Role / Device Role / Timing Role: Always-on power source maintaining RTC, secure boot, and cellular keep-alive functions during ignition-off states. Use Value: Guaranteed operation at 125°C ambient enables placement near LTE power amplifier; +60 V load-dump rating avoids external clamping diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV8664DT33RKG | 3.3 V ±2%, 500 mA output, 450 mV dropout at 250 mA, higher IQ (250 µA @ 1 mA) | Higher current capability but less optimized for ultra-low-IQ sleep modes | Select when >400 mA peak load or lower dropout is required; verify thermal margin with RθJA = 65°C/W (DPAK) |
| TLE4274G33 | 3.3 V ±2%, 400 mA, 600 mV dropout at 250 mA, no reverse-battery protection | Lacks −42 V reverse-battery rating - requires external protection diode | Choose only in cost-sensitive non-safety-critical modules where reverse-battery risk is mitigated externally |
Compared with NCV4274ADT33RKG, NCV8664DT33RKG offers higher output current but increased quiescent draw, while TLE4274G33 lacks integrated reverse-battery protection - making NCV4274ADT33RKG the optimal choice for robust, drop-in replacement in AEC-Q100-compliant ECUs requiring full fault coverage.
Availability
NCV4274ADT33RKG is available at Aetrix Electronics and suitable for automotive engine control units, body electronics modules, and ADAS camera ECUs requiring stable component supply with full AEC-Q100 compliance and long-term production support.
Supply support for NCV4274ADT33RKG 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 connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The NCV4274ADT33RKG belongs to onsemi's automotive-qualified linear regulator product line, designed specifically for harsh-environment vehicle subsystems requiring high reliability, wide input range, and comprehensive fault protection.
FAQ
What is the maximum input voltage rating for NCV4274ADT33RKG?
The NCV4274ADT33RKG has an absolute maximum input voltage of 45 V, with continuous operating input voltage specified from 4.5 V to 40 V. It withstands transient peaks up to +60 V relative to ground per ISO 7637-2 Pulse 5a, making it suitable for 12 V and 24 V automotive systems with load-dump events.
Does NCV4274ADT33RKG require an external capacitor on the input pin?
Yes, the NCV4274ADT33RKG requires a minimum 100 nF ceramic capacitor placed directly between pin 1 (Input) and pins 2/4 (Ground). This input capacitor stabilizes the regulator against line reactance and damps potential oscillations caused by PCB trace inductance - omission risks instability during fast load transients.
What is the thermal resistance (RθJA) of NCV4274ADT33RKG in its DPAK package?
The NCV4274ADT33RKG in DPAK (Case 369C) has a typical junction-to-ambient thermal resistance of 70°C/W when mounted on a minimal footprint FR4 board with standard copper layers. Achieving this value requires soldering the exposed tab (pins 2/4) to ≥5 mm² of 1 oz copper to ensure effective heat conduction away from the die.
Can NCV4274ADT33RKG operate with a 2.2 µF output capacitor?
Yes, the NCV4274ADT33RKG guarantees stability with a 2.2 µF output capacitor and ESR ≤2.5 Ω across its operating temperature range. The datasheet confirms stable operation at this minimum value for 3.3 V, 5.0 V, and 8.5 V versions - though 10 µF is recommended for improved load-transient response in automotive applications.
Is NCV4274ADT33RKG pin-compatible with other NCV4274 variants in DPAK?
Yes, all NCV4274x DTxxRKG variants (e.g., NCV4274ADT50RKG, NCV4274DT33RKG) share identical DPAK-3 pinout: pin 1 = Input, pins 2/4 = Ground, pin 3 = Output. Voltage accuracy (±2% vs ±4%) and output voltage (3.3 V, 5.0 V, etc.) are the only functional differences - enabling direct substitution within same-voltage families.
NCV4274ADT33RKG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- 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):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.27V @ 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:
- DPAK
NCV4274ADT33RKG FAQ
1.How can I place an order for NCV4274ADT33RKG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV4274ADT33RKG 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 NCV4274ADT33RKG reliable?
The price and inventory of NCV4274ADT33RKG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV4274ADT33RKG is usually 5 days.
3.What payment methods are accepted for NCV4274ADT33RKG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV4274ADT33RKG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV4274ADT33RKG?
NCV4274ADT33RKG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV4274ADT33RKG 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 NCV4274ADT33RKG?
For technical support, including NCV4274ADT33RKG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV4274ADT33RKG requirements.
6.How does Aetrix verify that NCV4274ADT33RKG is sourced from the original manufacturer or authorized distributors?
All NCV4274ADT33RKG 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 NCV4274ADT33RKG meets industry standards.
7.What is the process for return or replacement of NCV4274ADT33RKG?
All NCV4274ADT33RKG units undergo pre-shipment inspection (PSI). If there is an issue with NCV4274ADT33RKG, 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 NCV4274ADT33RKG part is unused and in its original packaging.
Return procedure for NCV4274ADT33RKG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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