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onsemi NCV8675DT33RKG
- Part No.:
- NCV8675DT33RKG
- Manufacturer:
- onsemi
- Package:
- TO-252-5, DPAK (4 Leads + Tab), TO-252AD
- Datasheet:
-
NCV8675DT33RKG.pdf
- Description:
- IC REG LINEAR 3.3V 350MA DPAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,183
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Product details
Overview
NCV8675DT33RKG from onsemi is a 3.3 V fixed-output, low-dropout linear regulator delivering up to 350 mA output current with 34 µA typical quiescent current at light load, ±2.5% output accuracy over full temperature range, and integrated reset functionality with adjustable delay. It serves as a primary power supply for automotive microcontrollers requiring stable voltage under wide input (4.5 V–45 V) and harsh thermal conditions.
For engineers reviewing the NCV8675DT33RKG datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at full load (≤600 mV), reset threshold accuracy (3.069 V–3.168 V), thermal shutdown at 150 °C, and AEC-Q100 qualification for automotive use.
Technical Context
The NCV8675DT33RKG uses a PNP pass transistor controlled by an error amplifier with bandgap reference, enabling low dropout and high temperature stability. Its internal reset generator monitors Vout and asserts open-collector RO when output falls below threshold, with delay timing set by external capacitor on D pin.
Protection includes −42 V reverse-voltage tolerance, short-circuit/overcurrent limiting (100–600 mA), and thermal shutdown. No external components are required for fault protection, and stability is ensured with ≥22 µF output capacitor and ESR < 7 mΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V fixed, ±2.5% accuracy over −40 °C to +150 °C ensures reliable MCU core logic supply across automotive ambient extremes. |
| Max Dropout Voltage | 600 mV at 350 mA load enables operation down to Vin = 3.9 V while maintaining regulation - critical for cold-crank scenarios. |
| Quiescent Current | 34 µA typical at 100 µA load minimizes standby power loss in always-on vehicle modules like body control units. |
| Input Voltage Range | 4.5 V to 45 V supports direct battery connection across 12 V and 24 V automotive systems, including load-dump transients. |
| Reset Threshold | 2.97 V to 3.168 V (Vout,rt) guarantees deterministic microcontroller reset assertion before brownout-induced malfunction. |
| Thermal Shutdown | 150 °C junction threshold prevents permanent damage during sustained overload or poor heatsinking in enclosed ECUs. |
| ESR Requirement | Output capacitor ESR < 7 mΩ ensures loop stability with 22 µF ceramic/tantalum - avoids oscillation in safety-critical power rails. |
Pinout & Package
DPAK−5 package (Case 175AA), surface-mount, thermally enhanced with exposed tab connected to GND (Pin 3). Pin 1 (Vin) accepts wide-input battery rail; Pin 5 (Vout) delivers regulated 3.3 V; Pin 2 (RO) provides open-collector reset signal; Pin 4 (D) sets reset delay via external capacitor.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. Vin | Unregulated input | Battery input (4.5–45 V); requires ceramic bypass capacitor to GND for noise suppression and transient immunity. |
| 2. RO | Reset output | Open-collector active-low signal; pulled up externally to Vout (typically 5 kΩ) to indicate valid power-on condition. |
| 3. GND / Tab | Ground reference & thermal path | Internally connected to exposed metal tab; must be soldered to large PCB copper area for thermal management (RθJA = 112.2 °C/W). |
| 4. D | Reset delay timing | Charged by 4 µA internal current source; delay time = CD × 1.3 V / 4 µA (e.g., 47 nF → ~15.3 ms). |
| 5. Vout | Regulated output | 3.3 V / 350 mA supply; requires ≥22 µF output capacitor with ESR < 7 mΩ for stability per Figure 2. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Qualified to Grade 1 (−40 °C to +125 °C ambient) with stress testing per automotive reliability standard - suitable for engine bay and chassis applications. |
| Integrated reset with programmable delay | Eliminates external supervisor IC; delay adjustable from milliseconds to seconds via single capacitor on D pin - simplifies BOM and layout. |
| −42 V reverse-voltage protection | Withstands battery misconnection without external diode - reduces system-level protection component count and cost. |
| Low-ESR capacitor compatibility | Stable with ceramic, tantalum, or aluminum electrolytic capacitors ≥22 µF and ESR < 7 mΩ - enables compact, high-reliability designs. |
| Pb-free and RoHS compliant | Meets global automotive environmental regulations; marked with "G" suffix and compatible with lead-free reflow profiles (265 °C peak). |
Applications
| Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) Camera Power |
|---|---|
Use Scenario: Supplies 3.3 V to microcontroller, CAN transceiver, and sensor interface in door module or lighting controller. IC Role / Device Role / Timing Role: Primary LDO providing always-on regulated rail with reset signaling for safe boot sequence after ignition cycle. Use Value: 34 µA quiescent current extends battery life during vehicle sleep mode; AEC-Q100 qualification ensures operation at −40 °C to +125 °C ambient. | Use Scenario: Powers image signal processor and serializer in rear-view or surround-view camera ECU. IC Role / Device Role / Timing Role: Stable 3.3 V source with precise reset assertion to prevent corrupted frame capture during cold start or voltage sag. Use Value: 600 mV dropout allows operation during 6 V cold-crank; ±2.5% output accuracy maintains ADC reference integrity across temperature. |
| Engine Control Unit (ECU) Auxiliary Rail | Automotive Infotainment System Microcontroller Supply |
Use Scenario: Generates auxiliary 3.3 V rail for non-critical peripherals (e.g., LIN transceivers, EEPROM) alongside main 5 V regulator. IC Role / Device Role / Timing Role: Secondary LDO with independent reset output to coordinate peripheral initialization sequence. Use Value: Integrated reverse-voltage protection eliminates need for external blocking diode - saves board space and improves efficiency. | Use Scenario: Supplies 3.3 V to application processor or audio DSP in head unit or telematics control unit. IC Role / Device Role / Timing Role: Regulated power source with programmable reset delay to synchronize boot with PMIC sequencing and memory initialization. Use Value: Adjustable reset delay (via D-pin capacitor) enables precise timing alignment with multi-rail power-up requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV8675DS33R4G | D2PAK−5 package (RθJA = 82.1 °C/W), higher thermal performance; same electrical specs and pinout. | Better suited for high-power-density designs or elevated ambient temperatures where DPAK thermal resistance is insufficient. | Select when junction temperature rise must be minimized under continuous 350 mA load in confined enclosures. |
| TLV73333PDBVR | 300 mA output, 40 µA Iq, no reset function, SOT-23-5 package; not AEC-Q100 qualified. | Limited to non-safety-critical consumer or industrial applications; lacks automotive-grade reliability and supervision features. | Choose only for cost-sensitive, non-automotive designs where reset and AEC-Q100 are unnecessary. |
Compared with NCV8675DS33R4G, the NCV8675DT33RKG offers lower cost and smaller footprint but reduced thermal capability; versus TLV73333PDBVR, it adds automotive qualification, reset functionality, and higher output current - making it irreplaceable in safety-compliant vehicle systems.
Availability
NCV8675DT33RKG is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera modules, and engine control units requiring stable component supply with long-term lifecycle support and AEC-Q100 compliance.
Supply support for NCV8675DT33RKG 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 supplier focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.
The NCV8675 series belongs to onsemi's automotive-qualified linear regulator product line, designed specifically for demanding vehicle subsystems requiring precision voltage regulation, robust fault protection, and guaranteed reset behavior under battery transients.
FAQ
What is the maximum input voltage the NCV8675DT33RKG can withstand?
The NCV8675DT33RKG supports an absolute maximum input voltage of 45 V and is rated for reverse-voltage protection down to −42 V. This enables direct connection to automotive battery rails, including handling of load-dump transients up to 40 V and accidental reverse-battery connection without damage. Operation above 45 V risks permanent device failure.
Does the NCV8675DT33RKG require external components for basic operation?
Yes - the NCV8675DT33RKG requires at minimum a 100 nF ceramic input capacitor (Cin) between Vin and GND, a 22 µF output capacitor (Cout) with ESR < 7 mΩ, and a 5 kΩ pull-up resistor from RO to Vout. A timing capacitor on the D pin is needed only if reset delay adjustment is required. No external components are needed for fault protection.
How is the reset delay time calculated for the NCV8675DT33RKG?
The reset delay time for the NCV8675DT33RKG is calculated using tRD = CD × 1.3 V / 4 µA, where CD is the capacitor value on the D pin. For example, a 47 nF capacitor yields ~15.3 ms delay. The upper timing threshold (VDU) is 1.3 V and internal charging current (ID,C) is 4 µA - both confirmed in the Electrical Characteristics table on page 4 of the datasheet.
Is the NCV8675DT33RKG pin-compatible with other regulators in its family?
Yes - the NCV8675DT33RKG is pin-for-pin compatible with the NCV8675DT50RKG (5.0 V version) and NCV4275 series. All share identical DPAK−5 pinout (Vin, RO, GND, D, Vout), allowing voltage variant swaps without PCB redesign. However, output voltage and reset thresholds differ, so firmware validation is required after substitution.
What thermal considerations apply to the NCV8675DT33RKG in continuous 350 mA operation?
At 350 mA and 13.5 V input, the NCV8675DT33RKG dissipates up to 3.55 W. With RθJA = 112.2 °C/W (DPAK), junction temperature rise exceeds safe limits without thermal relief. Designers must use ≥100 mm² 1 oz copper area under the exposed tab or add a heatsink; derating to ≤200 mA is recommended for unheatsinked operation above 70 °C ambient.
NCV8675DT33RKG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-5, DPAK (4 Leads + Tab), TO-252AD
- 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:
- DPAK-5
NCV8675DT33RKG FAQ
1.How can I place an order for NCV8675DT33RKG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8675DT33RKG 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 NCV8675DT33RKG reliable?
The price and inventory of NCV8675DT33RKG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8675DT33RKG is usually 5 days.
3.What payment methods are accepted for NCV8675DT33RKG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8675DT33RKG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8675DT33RKG?
NCV8675DT33RKG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8675DT33RKG 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 NCV8675DT33RKG?
For technical support, including NCV8675DT33RKG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8675DT33RKG requirements.
6.How does Aetrix verify that NCV8675DT33RKG is sourced from the original manufacturer or authorized distributors?
All NCV8675DT33RKG 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 NCV8675DT33RKG meets industry standards.
7.What is the process for return or replacement of NCV8675DT33RKG?
All NCV8675DT33RKG units undergo pre-shipment inspection (PSI). If there is an issue with NCV8675DT33RKG, 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 NCV8675DT33RKG part is unused and in its original packaging.
Return procedure for NCV8675DT33RKG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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