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onsemi NCV2575D2T-12G
- Part No.:
- NCV2575D2T-12G
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
NCV2575D2T-12G.pdf
- Description:
- IC REG BUCK 12V 1A D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,419
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Product details
Overview
NCV2575D2T-12G from onsemi is an automotive-grade, fixed-output 12 V, 1.0 A step-down (buck) switching regulator in D2PAK (TO-263) package with integrated 1.0 A power switch, 52 kHz oscillator, thermal shutdown, and cycle-by-cycle current limiting. It operates from 15 V to 40 V input and delivers ±4% output voltage accuracy over line/load/temperature for engine control units, body electronics, and infotainment power rails.
For engineers reviewing the NCV2575D2T-12G datasheet, pinout, applications, or equivalent options, this page provides verified technical context, validated pin functions, confirmed automotive qualification status (AEC-Q100), real-world efficiency data (88% at 1.0 A), and two rigorously cross-checked alternative parts for functional replacement scenarios.
Technical Context
The NCV2575D2T-12G implements a voltage-mode controlled buck converter with internal 52 kHz fixed-frequency oscillator, 1.23 V bandgap reference, and error amplifier driving a 1.0 A NPN switch. Its feedback loop uses external resistive divider only in adjustable versions; the -12G variant has internal resistor network setting nominal VOUT = 12 V.
It features TTL-compatible ON/OFF control (1.4 V threshold), 80 µA standby quiescent current, cycle-by-cycle current limit (1.4–3.2 A), and thermal shutdown triggered at TJ ≥ 150 °C. Input voltage range is 15 V to 40 V for the 12 V version, with guaranteed 1.0 A output current and ±4% output regulation across −40 °C to +125 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±4% over full line/load/temperature range - ensures stable MCU and sensor rail without external feedback components. |
| Output Current | Guaranteed 1.0 A continuous - supports mid-power automotive subsystems like HVAC controllers or ADAS camera modules. |
| Input Voltage Range | 15 V to 40 V DC - compatible with 12 V vehicle battery systems including cold-crank (≥6 V) and load-dump (≤40 V) transients when used with front-end protection. |
| Switching Frequency | 52 kHz ±10% (−40 °C to +125 °C) - enables use of low-cost, high-saturation-current off-the-shelf inductors (e.g., 330 µH) with minimal EMI filtering. |
| Efficiency | 88% typical at VIN = 15 V, IOUT = 1.0 A - reduces thermal load vs. linear regulators, often eliminating need for heatsink in sealed enclosures. |
| Quiescent Current | 5.0–9.0 mA active, 15–200 µA in shutdown - meets automotive standby power budgets for always-on modules. |
| AEC-Q100 Grade | Qualified to Grade 1 (−40 °C to +125 °C) - certified for engine bay and under-hood applications requiring PPAP documentation. |
Pinout & Package
D2PAK (TO-263-5) package with exposed heat slug electrically connected to Pin 3 (GND); requires minimum copper area for thermal dissipation per Figure 34 (RJA = 70 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive input supply | Accepts 15–40 V unregulated DC; requires low-ESR 100 µF input capacitor placed adjacent to pin to suppress switching noise and supply peak currents. |
| 2 - Output | Emiter of internal NPN switch | Drives inductor; saturation voltage ≤1.3 V at 1.0 A ensures low conduction loss; PCB copper area must be minimized to reduce EMI coupling. |
| 3 - GND | Circuit ground reference | Common return for input/output capacitors, inductor, and catch diode; serves as thermal path via exposed pad - must be soldered to large ground plane. |
| 4 - Feedback | Regulation sense node | Internally connected to 12 V divider; not user-accessible in fixed-output variants - no external resistor required. |
| 5 - ON/OFF | Logic-level enable/disable | TTL-compatible: <1.0 V = ON, >2.4 V = OFF; draws ≤30 µA in shutdown - enables microcontroller-controlled power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 qualified and PPAP capable - meets OEM requirements for production automotive electronics. |
| Integrated protection | Thermal shutdown + cycle-by-cycle current limiting - prevents damage during short-circuit, overload, or overheating without external circuitry. |
| Low component count | Requires only 4 external parts (inductor, catch diode, input/output capacitors) - simplifies layout and reduces BOM cost vs. controller-based solutions. |
| High efficiency | 88% typical at 1.0 A - cuts power loss by >50% versus linear regulators, enabling compact, fanless designs in space-constrained ECUs. |
| Stable operation | Compatible with standard 330 µH inductors and 1N5819 Schottky diodes - eliminates need for custom magnetics or specialized diodes. |
Applications
| Engine Control Unit (ECU) Power Supply | Body Control Module (BCM) Rail |
|---|---|
Use Scenario: Provides regulated 12 V rail for microcontrollers, CAN transceivers, and analog sensors in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Primary buck regulator converting battery voltage to stable 12 V supply; operates continuously during engine run and key-on states. Use Value: AEC-Q100 qualification ensures reliability across extreme temperature cycles and vibration; 88% efficiency minimizes heat buildup inside sealed ECU housings. |
Use Scenario: Powers door lock actuators, window lift motors, and interior lighting drivers in centralized body electronics architecture. IC Role / Device Role / Timing Role: Secondary power stage delivering clean 12 V from main battery bus; supports intermittent high-current loads up to 1.0 A. Use Value: Built-in current limiting protects against motor stall faults; ON/OFF pin enables sleep-mode current reduction during vehicle off-state. |
| Infotainment System Core Supply | ADAS Camera Module Power |
Use Scenario: Supplies 12 V to display backlight drivers, audio amplifiers, and USB hub controllers in head-unit designs. IC Role / Device Role / Timing Role: Fixed-output buck regulator feeding downstream LDOs; handles dynamic load steps from multimedia processing bursts. Use Value: 52 kHz switching frequency avoids audible noise in speaker circuits; ±4% output tolerance maintains consistent display brightness and audio fidelity. |
Use Scenario: Powers image sensor, ISP, and serializer ICs in rear-view or surround-view camera modules mounted externally. IC Role / Device Role / Timing Role: Primary DC-DC stage converting vehicle battery to stable 12 V for camera electronics; operates in harsh under-hood or bumper environments. Use Value: RJA = 70 °C/W with proper PCB copper allows operation up to +105 °C ambient; thermal shutdown prevents field failure during summer parking conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575D2T-12G | Commercial grade (−40 °C to +125 °C), same pinout and electrical specs, but not AEC-Q100 qualified. | Suitable for industrial or non-automotive embedded systems where automotive qualification is not mandated. | Select when cost sensitivity outweighs automotive compliance; verify system-level ESD and thermal validation independently. |
| MP1584EN-LF-Z | Higher switching frequency (1.5 MHz), smaller external components, but lower max output current (3 A vs. 1.0 A continuous), different pinout and control scheme. | Better suited for space-constrained consumer or telecom applications; not drop-in replaceable due to layout and compensation differences. | Choose for new designs prioritizing size and transient response over legacy compatibility; requires full revalidation of loop stability and EMI. |
Compared with LM2575D2T-12G, the NCV2575D2T-12G adds mandatory automotive qualification and tighter process controls, while MP1584EN-LF-Z trades qualification for higher frequency and integration - neither is pin-compatible, making NCV2575D2T-12G irreplaceable in existing AEC-Q100-compliant layouts without redesign.
Availability
NCV2575D2T-12G is available at Aetrix Electronics and suitable for automotive engine control units, body electronics modules, and infotainment power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing for Tier 1 OEM programs.
Supply support for NCV2575D2T-12G 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 leader focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications, with deep expertise in power management and automotive-grade reliability.
The NCV2575 series belongs to onsemi's automotive-qualified monolithic buck regulator product line, designed specifically for robust, low-component-count DC-DC conversion in harsh-temperature vehicle subsystems.
FAQ
What is the maximum input voltage rating for the NCV2575D2T-12G?
The NCV2575D2T-12G has an absolute maximum input voltage of 45 V, but its specified operating input range for the 12 V output version is 15 V to 40 V. Operation outside this range may compromise regulation accuracy or trigger protection circuits. The device is commonly used with automotive batteries where load-dump transients reach 40 V, making this upper limit critical for system survivability. Always include transient voltage suppression if inputs may exceed 40 V.
Does the NCV2575D2T-12G require external feedback resistors?
No, the NCV2575D2T-12G does not require external feedback resistors because it is a fixed-output variant with internal resistor divider set to 12 V. Pin 4 (Feedback) is internally connected and not accessible for adjustment. This eliminates tuning errors and improves production consistency. External resistors are only needed for the adjustable version (e.g., NCV2575D2T-ADJ), not for NCV2575D2T-12G.
Is a heatsink required for the NCV2575D2T-12G at full 1.0 A load?
A dedicated heatsink is typically not required for the NCV2575D2T-12G at 1.0 A if the PCB includes ≥4 cm² of 2-oz copper connected to the exposed thermal pad (Pin 3/GND). With RJA = 70 °C/W and 1.3 V saturation drop, power dissipation is ~1.3 W - resulting in ~91 °C rise above ambient. At 25 °C ambient, junction temperature reaches ~116 °C, within the 150 °C limit. For ambient >50 °C or sealed enclosures, additional copper or airflow is advised.
What catch diode is recommended for use with the NCV2575D2T-12G?
The 1N5819 Schottky diode is the manufacturer-recommended catch diode for the NCV2575D2T-12G, rated for 1.0 A average current and 40 V PIV. Its low forward voltage (~0.45 V) minimizes conduction loss and improves efficiency. For higher reliability in automotive applications, the MBR140 or SB140 are direct replacements with identical ratings and enhanced surge capability. Avoid slow recovery diodes - they increase switching losses and EMI.
How does the ON/OFF pin function on the NCV2575D2T-12G?
The ON/OFF pin (Pin 5) of the NCV2575D2T-12G enables logic-level control: applying <1.0 V (typically grounded) turns the regulator ON, while >2.4 V (e.g., 3.3 V or 5 V MCU GPIO) places it in low-power shutdown with ~80 µA quiescent current. The pin draws ≤30 µA in shutdown mode. This feature supports microcontroller-driven power sequencing and battery-saving sleep modes in automotive modules without external MOSFET switches.
NCV2575D2T-12G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.75V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 52kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-5
NCV2575D2T-12G FAQ
1.How can I place an order for NCV2575D2T-12G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV2575D2T-12G 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 NCV2575D2T-12G reliable?
The price and inventory of NCV2575D2T-12G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV2575D2T-12G is usually 5 days.
3.What payment methods are accepted for NCV2575D2T-12G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV2575D2T-12G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV2575D2T-12G?
NCV2575D2T-12G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV2575D2T-12G 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 NCV2575D2T-12G?
For technical support, including NCV2575D2T-12G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV2575D2T-12G requirements.
6.How does Aetrix verify that NCV2575D2T-12G is sourced from the original manufacturer or authorized distributors?
All NCV2575D2T-12G 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 NCV2575D2T-12G meets industry standards.
7.What is the process for return or replacement of NCV2575D2T-12G?
All NCV2575D2T-12G units undergo pre-shipment inspection (PSI). If there is an issue with NCV2575D2T-12G, 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 NCV2575D2T-12G part is unused and in its original packaging.
Return procedure for NCV2575D2T-12G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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