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onsemi NCV8675DS33R4G
- Part No.:
- NCV8675DS33R4G
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
NCV8675DS33R4G.pdf
- Description:
- IC REG LINEAR 3.3V 350MA D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,462
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Product details
Overview
NCV8675DS33R4G from onsemi is a 3.3 V fixed-output, 350 mA low-dropout linear regulator with integrated power-on reset (POR), 34 µA typical quiescent current at light load, ±2.5% output accuracy over full temperature range, and AEC-Q100 qualification for automotive use in engine control units and body electronics.
For engineers reviewing the NCV8675DS33R4G datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, package-specific thermal data, reset timing design guidance, and validated automotive-grade alternatives - all grounded in the official onsemi Rev. 8 datasheet.
Technical Context
The NCV8675DS33R4G uses a PNP series pass transistor controlled by a bandgap-referenced error amplifier to achieve low dropout (≤600 mV at 350 mA) and high temperature stability. Its internal reset generator provides active-low open-collector RO output with adjustable delay via external capacitor on the D pin.
It integrates reverse-voltage protection (−42 V), short-circuit/overcurrent limiting (350 mA current limit, 100–600 mA short-circuit clamp), and thermal shutdown (150 °C threshold). No external components are required for fault protection, and it operates across 4.5 V to 45 V input range with EMI robustness per IEC62132-4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±2.5% over −40 °C to +150 °C - ensures stable MCU core supply under automotive thermal stress |
| Max Output Current | 350 mA continuous - supports mid-tier automotive microcontrollers and CAN transceivers |
| Dropout Voltage | 600 mV max at 350 mA - enables operation down to Vin = 3.9 V while maintaining regulation |
| Quiescent Current | 34 µA typical at 100 µA load - critical for always-on vehicle modules meeting ISO 16750-2 sleep current limits |
| Reset Threshold | 2.97 V to 3.168 V (3.3 V version) - guarantees reliable POR assertion during cold-crank battery dips |
| Input Voltage Range | 4.5 V to 45 V - accommodates 12 V and 24 V automotive systems including load dump transients |
| Thermal Shutdown | 150 °C junction threshold - protects against sustained overload without external thermal monitoring |
Pinout & Package
D2PAK-5 (Case 936A) package with exposed tab thermally and electrically connected to Pin 3 (GND); RoHS-compliant Pb-free construction; 4.3 °C/W junction-to-case thermal resistance enables high-power dissipation with minimal heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. Vin | Unregulated input | Accepts 4.5–45 V battery rail; requires ceramic bypass capacitor to GND for stability |
| 2. RO | Reset output | Open-collector active-low signal; pulled up externally (e.g., 5.0 kΩ to Vout) to indicate valid Vout |
| 3. GND / Tab | Ground reference & thermal path | Internally connected to exposed metal tab; must be soldered to large copper area for thermal management |
| 4. D | Reset delay timing | Charged by 4 µA internal current source; delay time set by external capacitor (e.g., 47 nF → 15.3 ms) |
| 5. Vout | Regulated output | 3.3 V @ 350 mA; requires ≥22 µF output capacitor with ESR < 7 mΩ for loop stability |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualified | Validated for −40 °C to +125 °C ambient operation in automotive powertrain and chassis systems |
| Integrated POR with adjustable delay | Reset assertion synchronized to Vout regulation; delay programmable from ~10 ms to >100 ms via CD capacitor |
| −42 V reverse-voltage protection | Survives battery terminal reversal without external diode - eliminates discrete protection component |
| EMC-compliant design | Passes conducted susceptibility testing per IEC62132-4 (33 dBm on Vin/Vout, 17 dBm on RO/D pins) |
| No external protection components | Internal current limit, thermal shutdown, and reverse-voltage protection reduce BOM count and board space |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powering 3.3 V microcontroller and CAN transceiver in gasoline/diesel engine management system under wide temperature and voltage transients. IC Role / Device Role / Timing Role: Primary 3.3 V LDO regulator with POR signaling to MCU reset pin; ensures deterministic boot after cold crank or load dump. Use Value: 34 µA quiescent current prevents excessive battery drain during extended key-off periods; 45 V max input withstands ISO 7637-2 pulse 5a. |
Use Scenario: Supplying door module MCU, LIN transceiver, and LED drivers in 12 V vehicle architecture with frequent sleep/wake cycles. IC Role / Device Role / Timing Role: System-level 3.3 V power rail with synchronized reset generation; RO output triggers MCU initialization only after Vout stabilizes. Use Value: ±2.5% output accuracy maintains ADC reference integrity across −40 °C to +105 °C; D2PAK thermal performance sustains 350 mA at 85 °C ambient. |
| Advanced Driver Assistance Systems (ADAS) Camera | Automotive Infotainment Power Sequencing |
Use Scenario: Providing clean 3.3 V bias to image sensor and ISP in rear-view camera exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO with thermal shutdown; RO signal gates sensor initialization until regulated power is confirmed. Use Value: 70 dB PSRR at 100 Hz suppresses alternator ripple; 150 °C thermal shutdown prevents latch-up during prolonged sun exposure. |
Use Scenario: Generating sequenced 3.3 V supply for infotainment SoC with precise reset coordination across multiple voltage rails. IC Role / Device Role / Timing Role: Reset timing element in multi-rail power tree; D pin capacitor sets delay to match slower 5 V or 1.8 V regulators. Use Value: Adjustable reset delay (10–24 ms with 47 nF) enables synchronization with other regulators' startup times without external timers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV8674DS33R4G | Same pinout, 350 mA, but no reset function; 45 µA max IQ vs. 50 µA for NCV8675DS33R4G | Lacks RO/D pins - unsuitable where POR sequencing is required | Select when reset functionality is unnecessary and lowest possible quiescent current is prioritized |
| TLV73333PDRVR | 3.3 V, 300 mA, SOT-23-5; 65 µA IQ; no reverse-voltage or thermal protection; not AEC-Q100 qualified | Lower current, no automotive qualification, no fault protection - limited to non-safety-critical consumer-grade modules | Use only in cost-sensitive, non-automotive designs with benign environments and external protection |
Compared with NCV8675DS33R4G, NCV8674DS33R4G removes reset capability to reduce complexity and slightly lower IQ, while TLV73333PDRVR trades automotive robustness and protection for small size and lower cost - neither offers drop-in replacement without circuit redesign.
Availability
NCV8675DS33R4G is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and ADAS camera power supplies requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for NCV8675DS33R4G 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, high-reliability components for automotive, industrial, and cloud power applications.
The NCV8675DS33R4G belongs to onsemi's Automotive Smart Regulator™ family, engineered specifically for harsh-temperature, high-transient automotive power domains requiring integrated protection and precise reset timing.
FAQ
What is the maximum input voltage rating for the NCV8675DS33R4G?
The NCV8675DS33R4G supports an absolute maximum input voltage of 45 V and operates across 4.5 V to 45 V. It also withstands −42 V reverse-voltage transients, making it suitable for 12 V and 24 V automotive systems including load dump and battery reversal events per ISO 16750-2.
Does the NCV8675DS33R4G require external capacitors, and what are the recommended values?
Yes, the NCV8675DS33R4G requires a minimum 22 µF output capacitor with ESR < 7 mΩ (ceramic, tantalum, or low-ESR electrolytic) and a 100 nF ceramic input capacitor. The reset delay capacitor (CD) is typically 47 nF for ~15 ms delay; values between 10 nF and 100 nF adjust delay proportionally.
How is the reset delay time calculated for the NCV8675DS33R4G?
Reset delay time tRD = CD × VDU / ID, where VDU = 1.3 V (upper timing threshold), ID = 4 µA (internal charging current). For example, with CD = 47 nF, tRD = 47 nF × 1.3 V / 4 µA ≈ 15.3 ms. This formula is validated in the onsemi datasheet Figure 34 and Section 11.
Is the NCV8675DS33R4G pin-compatible with other regulators in the NCV867x family?
Yes, the NCV8675DS33R4G is pin-for-pin compatible with the NCV8675DS50R4G (5.0 V version) and NCV4275 series. All share identical D2PAK-5 pinout (Vin, RO, GND/Tab, D, Vout), enabling voltage variant swaps without PCB changes - provided output capacitance and reset timing are revalidated.
What thermal performance can be expected from the NCV8675DS33R4G in a standard D2PAK layout?
In a standard 1 oz. copper layout with 100 mm² thermal pad area, the NCV8675DS33R4G achieves RthJA ≈ 82.1 °C/W (D2PAK). At 350 mA load and 13.5 V input, power dissipation is ~3.5 W; junction temperature rise would be ~287 °C above ambient - confirming mandatory use of thermal copper pour or heatsink per onsemi AN1040/D guidelines.
NCV8675DS33R4G 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):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 350mA
- Current - Quiescent (Iq):
- 45 µA
- Current - Supply (Max):
- 60 µA
- PSRR:
- 70dB (100Hz)
- Control Features:
- Reset
- Protection Features:
- Over Temperature, Over Voltage, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-5
NCV8675DS33R4G FAQ
1.How can I place an order for NCV8675DS33R4G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8675DS33R4G 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 NCV8675DS33R4G reliable?
The price and inventory of NCV8675DS33R4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8675DS33R4G is usually 5 days.
3.What payment methods are accepted for NCV8675DS33R4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8675DS33R4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8675DS33R4G?
NCV8675DS33R4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8675DS33R4G 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 NCV8675DS33R4G?
For technical support, including NCV8675DS33R4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8675DS33R4G requirements.
6.How does Aetrix verify that NCV8675DS33R4G is sourced from the original manufacturer or authorized distributors?
All NCV8675DS33R4G 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 NCV8675DS33R4G meets industry standards.
7.What is the process for return or replacement of NCV8675DS33R4G?
All NCV8675DS33R4G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8675DS33R4G, 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 NCV8675DS33R4G part is unused and in its original packaging.
Return procedure for NCV8675DS33R4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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