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onsemi NCV4275CDS33R4G
- Part No.:
- NCV4275CDS33R4G
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
NCV4275CDS33R4G.pdf
- Description:
- IC REG LINEAR 3.3V 450MA D2PAK
- Quantity:
- Payment:
- Shipping:
Inventory:529
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Product details
Overview
NCV4275CDS33R4G from onsemi is an automotive-grade, low-dropout linear voltage regulator delivering a stable 3.3 V ±2% output at up to 450 mA, featuring integrated active reset output (RO), programmable reset delay via external capacitor, and comprehensive fault protection including +45 V transient, −42 V reverse voltage, short-circuit, and thermal shutdown. It operates across −40 °C to +150 °C and is used in body control modules, powertrain sensors, and infotainment power rails.
For engineers reviewing the NCV4275CDS33R4G datasheet, pinout, applications, or equivalent options, key selection considerations include its D2PAK-5 package, 500 mV max dropout at 300 mA, reset threshold tracking 90–96% of VQ, ESR-stable operation with 22 µF output capacitor (≤3.5 Ω), and AEC-Q100 qualification for automotive deployment.
Technical Context
The NCV4275CDS33R4G uses a PNP pass transistor controlled by a bandgap-referenced error amplifier to achieve low dropout and high temperature stability. Its reset generator monitors VQ and triggers RO low when output falls below 90% of nominal, with delay timing set by external capacitor on pin D and charge current ID,C = 5.5 µA (typ).
Protection architecture includes foldback current limiting, thermal shutdown at 150 °C (guaranteed by design), and robust input tolerance: −42 V reverse and +45 V transient survival. The device maintains regulation over VI = 4.4 V to 42 V for the 3.3 V version and supports stable operation with ceramic, tantalum, or aluminum electrolytic output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±2% - tight regulation ensures reliable microcontroller and sensor supply under load and temperature variation. |
| Max Output Current | 450 mA - sufficient for powering multiple automotive ICs or small subsystems without external boost. |
| Dropout Voltage | ≤500 mV at 300 mA - enables operation down to VI = 3.8 V while maintaining 3.3 V output, critical for cold-crank scenarios. |
| Reset Threshold | 90–96% of VQ - tracks output voltage directly, eliminating need for external monitoring circuitry. |
| Input Voltage Range | 4.4 V to 42 V - covers full automotive battery range including load dump transients and start-stop operation. |
| Quiescent Current | 150 µA (typ) at 1 mA load - minimizes standby power loss in always-on vehicle domains. |
| ESR Stability Limit | ≤3.5 Ω for 22 µF CQ - compatible with low-ESR ceramic capacitors, reducing board space and improving transient response. |
Pinout & Package
D2PAK-5 surface-mount package (Case 936A-02), thermally enhanced with exposed tab internally connected to GND (pin 3). Pin 1 (I) accepts battery input; pin 5 (Q) delivers regulated 3.3 V; pin 2 (RO) provides open-collector reset signal; pin 4 (D) sets reset delay via external capacitor; pin 3/tab (GND) serves as power and thermal reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I) | Battery Input Supply | Accepts 4.4–42 V automotive rail; requires 1000 µF bulk + 100 nF ceramic bypass to suppress transients and noise. |
| 2 (RO) | Open-Collector Reset Output | Pulls low when VQ drops below 90% of nominal; requires external 5.0 kΩ pull-up to VQ for microcontroller reset signaling. |
| 3 / Tab (GND) | Power & Thermal Ground | Internally connected to exposed metal tab; must be soldered to large copper pour for thermal dissipation and EMI control. |
| 4 (D) | Reset Delay Timing | Charges with 5.5 µA current to set delay time (e.g., 47 nF → 16 ms); decouples reset timing from supply ripple. |
| 5 (Q) | Regulated 3.3 V Output | Delivers up to 450 mA with ±2% accuracy; bypassed with 22 µF capacitor (ESR ≤3.5 Ω) for loop stability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Qualified to Grade 1 (−40 °C to +125 °C ambient) and PPAP-capable - meets automotive production audit requirements. |
| Active Reset with Tracking Threshold | RO asserts low when VQ falls below 90% of nominal and releases only after VQ exceeds 96%, preventing false resets during brownouts. |
| Transient & Reverse Polarity Robustness | Survives +45 V load dump peaks and −42 V reverse battery connection without latch-up or damage - eliminates need for external TVS or diode protection. |
| Thermal Shutdown with Hysteresis | Shuts down at 150 °C junction temperature and restarts only after cooling to ~120 °C - prevents thermal runaway during sustained overload. |
| Low-ESR Capacitor Compatibility | Stable with ceramic output capacitors (e.g., Murata GRM32ER71A226ME20) - enables compact, high-reliability designs without electrolytic aging concerns. |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) Sensor Power |
|---|---|
Use Scenario: Powers CAN transceivers, LIN interface ICs, and door lock actuators in centralized body electronics. IC Role / Device Role / Timing Role: Primary 3.3 V LDO supplying logic-level peripherals; RO signal initiates MCU reset during battery disconnect or voltage sag. Use Value: Eliminates discrete reset supervisor and reduces BOM count by integrating regulation, protection, and reset in one D2PAK package. |
Use Scenario: Supplies oxygen sensors, knock sensors, and crankshaft position sensors requiring clean, stable 3.3 V bias under engine vibration and thermal cycling. IC Role / Device Role / Timing Role: Local point-of-load regulator with reset output tied to ECU watchdog timer to detect supply faults before sensor data corruption. Use Value: Maintains regulation down to 4.4 V input, enabling operation during cranking; ESR-insensitive stability avoids oscillation with sensor PCB layout constraints. |
| Infotainment Head Unit Power Rail | ADAS Camera Module Power |
Use Scenario: Provides auxiliary 3.3 V rail for display drivers, audio codecs, and touch controller in dashboard infotainment systems. IC Role / Device Role / Timing Role: Secondary regulator downstream of main DC/DC; RO output synchronizes system boot sequence with main processor power-up. Use Value: 450 mA capacity supports burst-mode LCD backlight drivers; low quiescent current (<200 µA) extends battery runtime in accessory mode. |
Use Scenario: Powers image signal processors (ISPs) and MIPI serializers in rear-view or surround-view camera modules mounted in hot under-hood locations. IC Role / Device Role / Timing Role: High-temp tolerant LDO (150 °C TJ max) with reset output ensuring ISP firmware loads only after stable 3.3 V is established. Use Value: D2PAK thermal performance (RJA = 49.0 °C/W on 1.2 sq. in. spreader) sustains 450 mA output at 125 °C ambient without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV4275CDT33RKG | DPAK-5 package (Case 175AA); identical electrical specs but lower thermal resistance to ambient (58.1 °C/W vs. 49.0 °C/W on 1.2 sq. in. board) due to smaller footprint and different pad layout. | Better suited for space-constrained PCBs where thermal spreader area is limited; less effective at dissipating >2 W continuously without heatsink. | Select NCV4275CDT33RKG when board real estate is constrained and peak power dissipation remains <1.5 W; otherwise retain D2PAK for higher thermal headroom. |
| TLV73333PDBVR | 300 mA rated, 250 mV typical dropout, no integrated reset output, SOT-23-5 package, not AEC-Q100 qualified. | Limited to non-safety-critical consumer or industrial applications; lacks automotive transient protection and reset functionality. | Only consider TLV73333PDBVR for cost-sensitive, non-automotive designs where reset supervision is handled externally and thermal load is light. |
Compared with NCV4275CDT33RKG, the NCV4275CDS33R4G offers superior thermal performance in high-power automotive environments; compared with TLV73333PDBVR, it delivers automotive-grade reliability, integrated reset, and robust fault protection - making it irreplaceable for functional-safety-aware systems.
Availability
NCV4275CDS33R4G is available at Aetrix Electronics and suitable for automotive body electronics, powertrain sensor interfaces, and ADAS camera module power supplies requiring stable component supply amid industry-wide obsolescence transitions.
Supply support for NCV4275CDS33R4G 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 focused on energy-efficient electronics for automotive, industrial, cloud, and IoT applications, with leadership in automotive power management and AEC-Q100-qualified components.
The NCV4275CDS33R4G belongs to onsemi's NCV4275C family of automotive LDO regulators, designed specifically for harsh-environment power supply and reset supervision in safety-critical vehicle subsystems.
FAQ
Is NCV4275CDS33R4G still in production or available for new designs?
No - NCV4275CDS33R4G is officially discontinued per onsemi's datasheet revision 1 (February 2026). However, Aetrix Electronics maintains legacy inventory and supports last-time-buy programs, extended lifecycle sourcing, and cross-reference engineering for migration paths to active alternatives like NCV4275CDT33RKG.
What is the maximum continuous power dissipation for NCV4275CDS33R4G at 125 °C ambient?
Using RJA = 49.0 °C/W (1.2 sq. in. spreader board) and TJ(max) = 150 °C, NCV4275CDS33R4G can dissipate up to 0.51 W continuously at 125 °C ambient. At 450 mA output and 13.5 V input, power dissipation is ~4.6 W - requiring thermal design with heatsinking or forced air to remain within limits.
Can NCV4275CDS33R4G be used with a 10 µF ceramic output capacitor instead of the recommended 22 µF?
No - the NCV4275CDS33R4G requires ≥22 µF output capacitance with ESR ≤3.5 Ω for guaranteed stability. Using 10 µF risks oscillation or poor load-transient response, as confirmed by Figures 2–5 in the datasheet showing instability regions below 22 µF across ESR ranges.
Does NCV4275CDS33R4G support reverse-battery protection without external components?
Yes - NCV4275CDS33R4G is rated for −42 V reverse input voltage and will not be damaged or latch up when battery polarity is reversed, eliminating the need for external series diodes or MOSFET-based protection circuits in automotive harness designs.
How is the reset delay time calculated for NCV4275CDS33R4G with a 100 nF timing capacitor?
Using tRD = CD × VDU / ID,C, with VDU = 1.8 V (typ) and ID,C = 5.5 µA (typ), a 100 nF capacitor yields tRD ≈ 100 nF × 1.8 V / 5.5 µA = 32.7 ms. This matches datasheet Figure 22 behavior and allows precise reset timing tuning independent of input voltage ripple.
NCV4275CDS33R4G 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:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 300mA
- Current - Output:
- 450mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 35 mA
- PSRR:
- 60dB (100Hz)
- Control Features:
- Reset
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-5
NCV4275CDS33R4G FAQ
1.How can I place an order for NCV4275CDS33R4G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV4275CDS33R4G 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 NCV4275CDS33R4G reliable?
The price and inventory of NCV4275CDS33R4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV4275CDS33R4G is usually 5 days.
3.What payment methods are accepted for NCV4275CDS33R4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV4275CDS33R4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV4275CDS33R4G?
NCV4275CDS33R4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV4275CDS33R4G 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 NCV4275CDS33R4G?
For technical support, including NCV4275CDS33R4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV4275CDS33R4G requirements.
6.How does Aetrix verify that NCV4275CDS33R4G is sourced from the original manufacturer or authorized distributors?
All NCV4275CDS33R4G 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 NCV4275CDS33R4G meets industry standards.
7.What is the process for return or replacement of NCV4275CDS33R4G?
All NCV4275CDS33R4G units undergo pre-shipment inspection (PSI). If there is an issue with NCV4275CDS33R4G, 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 NCV4275CDS33R4G part is unused and in its original packaging.
Return procedure for NCV4275CDS33R4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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