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onsemi NCV2575D2T-ADJ
- Part No.:
- NCV2575D2T-ADJ
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
NCV2575D2T-ADJ.pdf
- Description:
- IC REG BUCK ADJ 1A D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:7,630
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Product details
Overview
NCV2575D2T-ADJ from onsemi is a monolithic 1.0 A step-down (buck) switching regulator with adjustable output voltage (1.23 V to 37 V), 52 kHz fixed-frequency internal oscillator, and integrated 1.0 A power switch. It operates from 4.75 V to 40 V input, features thermal shutdown and cycle-by-cycle current limiting, and is used in automotive-grade DC/DC conversion where high efficiency and robust fault protection are required.
For engineers reviewing the NCV2575D2T-ADJ datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed ±4% output voltage accuracy over line/load/temperature, 80 µA standby current under TTL shutdown, feedback reference voltage of 1.23 V ±2%, and D2PAK (TO-263) package compatibility with heatsink-connected Pin 3.
Technical Context
The NCV2575D2T-ADJ implements a voltage-mode controlled buck converter architecture with a built-in 52 kHz oscillator, error amplifier referenced to a 1.23 V bandgap, and a 1.0 A NPN power switch. Its feedback loop accepts external resistor dividers to set output voltage, and its ON/OFF pin enables logic-level shutdown with 1.4 V typical threshold.
It integrates cycle-by-cycle current limiting (1.4–3.2 A peak over temperature), thermal shutdown, and an internal 3.1 V regulator for bias. The device supports continuous conduction mode operation and requires only four external components: input capacitor, output capacitor, catch diode, and inductor - all optimized for standard off-the-shelf parts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Guaranteed 1.0 A continuous load current without derating at TJ ≤ 125°C. |
| Input Voltage Range | 4.75 V to 40 V - supports wide automotive battery range including cold-crank (4.75 V) and load-dump (40 V) conditions. |
| Output Voltage Range | 1.23 V to 37 V adjustable via external resistors - enables single-part flexibility across diverse system rails. |
| Feedback Reference | 1.23 V ±2% over −40°C to +125°C - ensures stable regulation across automotive temperature extremes. |
| Switching Frequency | 52 kHz fixed (±10% over temp) - enables use of low-cost, high-saturation-current inductors and reduces EMI filtering complexity. |
| Standby Current | 80 µA typical at TJ = 25°C when ON/OFF pin = 5 V - minimizes quiescent drain in always-on vehicle modules. |
| Thermal Protection | Internal thermal shutdown activates at TJ ≥ 150°C - prevents permanent damage during overload or poor heatsinking. |
Pinout & Package
D2PAK (TO-263-5) package with exposed heatsink pad electrically connected to Pin 3 (GND); suitable for surface-mount assembly and direct PCB thermal coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive input supply | Accepts 4.75–40 V unregulated DC; requires low-ESR input capacitor placed adjacent to minimize switching noise and voltage transients. |
| 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 paths and thermal interface; heatsink surface is internally tied to this pin for efficient heat transfer. |
| 4 - Feedback | Error amplifier input | High-impedance node sensing output voltage divider; must be routed short and away from noisy traces to avoid regulation instability. |
| 5 - ON/OFF | Logic-controlled enable | TTL-compatible shutdown input; <1.4 V enables regulation, >2.2 V disables it; draws ≤30 µA when active, ≤200 µA when disabled. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | NCV prefix indicates AEC-Q100 Grade 1 (−40°C to +125°C junction) compliance for under-hood applications. |
| Integrated protection | Combines thermal shutdown, cycle-by-cycle current limiting, and internal soft-start - eliminates need for external fault-handling circuitry. |
| Low-component count | Only 4 external parts required (inductor, diode, Cin, Cout) - reduces BOM cost and board space vs. controller+MOSFET solutions. |
| Efficiency optimization | Typical 77% efficiency at 12 VIN/5 VOUT/1 A - significantly reduces heat generation vs. linear regulators, often eliminating heatsinks. |
| Stable feedback architecture | Fixed-gain error amplifier with 1.23 V reference enables predictable loop compensation using standard RC networks. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power Supply |
|---|---|
Use Scenario: Regulating 12 V battery input to 5 V or 3.3 V for microcontroller, CAN transceiver, and sensor interfaces in door modules or lighting controllers. IC Role / Device Role / Timing Role: Primary buck converter delivering clean, regulated rail with automotive-grade transient immunity and thermal resilience. Use Value: Eliminates need for external current sense or thermal monitoring; ±4% output tolerance ensures reliable logic-level operation across temperature and battery voltage swings. | Use Scenario: Generating isolated 12 V or 24 V auxiliary rails from 48 V industrial bus for analog front-end and digital logic in programmable logic controllers. IC Role / Device Role / Timing Role: High-current, wide-input buck regulator providing stable local power with minimal external components. Use Value: 40 V max input withstands 48 V bus transients; 1.0 A output supports multiple downstream LDOs or isolated DC/DC converters without derating. |
| On-Board Charger Auxiliary Supply | Telecom Remote Radio Unit (RRU) |
Use Scenario: Deriving 15 V or 24 V bias for gate drivers and communication ICs in EV on-board chargers operating from 200–450 V DC link via intermediate 48 V bus. IC Role / Device Role / Timing Role: Pre-regulator stage stepping down intermediate bus to lower-voltage rails before final LDO filtering. Use Value: High efficiency (up to 88% at 15 VOUT) reduces thermal load in sealed enclosures; 52 kHz frequency avoids interference with PWM control signals. | Use Scenario: Providing 5 V or 12 V power to FPGAs, ADCs, and RF front-end ICs in outdoor telecom base stations exposed to −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Rugged, temperature-stable buck regulator supporting long-life field deployment with no maintenance. Use Value: AEC-Q100 qualification ensures reliability under thermal cycling; 1.23 V reference stability (±2%) maintains ADC reference accuracy across full temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575D2T-ADJ | Commercial-grade (0°C to +125°C), same pinout and electrical specs but lacks AEC-Q100 qualification and tighter thermal specs. | Suitable for non-automotive industrial or consumer applications where extended temperature range is not required. | Select when cost sensitivity outweighs automotive qualification needs and ambient temperature stays within commercial range. |
| MP1584EN-LF-Z | Higher switching frequency (1.5 MHz), smaller external components, but lower 3 A current limit and no integrated thermal foldback. | Better suited for space-constrained designs requiring compact inductors, but less robust under sustained overload. | Choose for portable or dense PCB layouts where size matters more than automotive ruggedness or fault tolerance. |
Compared with LM2575D2T-ADJ, the NCV2575D2T-ADJ adds automotive qualification and wider operating temperature support without changing footprint or basic functionality; versus MP1584EN-LF-Z, it trades higher-frequency miniaturization for proven thermal protection and legacy design compatibility.
Availability
NCV2575D2T-ADJ is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLCs, on-board charger auxiliary supplies, and telecom remote radio units requiring stable component supply with long lifecycle assurance.
Supply support for NCV2575D2T-ADJ 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCV2575D2T-ADJ belongs to the NCV2575 family of automotive-grade buck regulators designed specifically for reliable, low-component-count DC/DC conversion in harsh environments - emphasizing thermal resilience, wide input range, and AEC-Q100 compliance.
FAQ
What is the maximum input voltage rating for the NCV2575D2T-ADJ?
The NCV2575D2T-ADJ has an absolute maximum input voltage rating of 45 V, with recommended continuous operation up to 40 V. This allows safe operation across automotive battery systems including cold-crank (down to 4.75 V) and load-dump (up to 40 V) events. Exceeding 45 V risks permanent damage to the internal switch and control circuitry.
Does the NCV2575D2T-ADJ require an external diode, and what type is recommended?
Yes, the NCV2575D2T-ADJ requires an external Schottky catch diode such as the 1N5820 or MBR320. The diode must handle ≥1.2× the maximum load current (≥1.2 A) and have a reverse voltage rating ≥1.25× the maximum input voltage (≥50 V for 40 VIN). Schottky types are mandatory to minimize forward voltage drop and improve efficiency.
How is the output voltage set on the NCV2575D2T-ADJ?
The NCV2575D2T-ADJ output voltage is set using two external resistors (R1 and R2) forming a voltage divider from output to feedback (Pin 4) and ground. The formula is VOUT = 1.23 V × (1 + R2/R1), with R1 typically 1.0 kΩ to 5.0 kΩ. For example, R1 = 1.8 kΩ and R2 = 9.88 kΩ yields ~8.0 V output. Precision 1% metal film resistors are recommended for stability.
What thermal considerations apply to the NCV2575D2T-ADJ in D2PAK package?
The NCV2575D2T-ADJ in D2PAK has RθJC = 5.0°C/W and RθJA = 70°C/W (with standard PCB layout). To maintain TJ ≤ 125°C at 1.0 A, the PCB copper area connected to Pin 3 (GND/heatsink pad) must provide ≥25 cm² of 2-oz copper with thermal vias. Without adequate heatsinking, power dissipation is limited to ~1.5 W at ambient 25°C.
Is the NCV2575D2T-ADJ pin-compatible with other members of the LM2575/NCV2575 family?
Yes, the NCV2575D2T-ADJ shares identical pinout, package outline, and electrical interface with all LM2575 and NCV2575 variants in D2PAK (D2T/D2PAK) packaging - including fixed-output versions (3.3 V, 5.0 V, 12 V, 15 V) and the commercial LM2575D2T-ADJ. No PCB redesign is needed when substituting within the same suffix family.
NCV2575D2T-ADJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.75V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 37V
- 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-ADJ FAQ
1.How can I place an order for NCV2575D2T-ADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV2575D2T-ADJ 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-ADJ reliable?
The price and inventory of NCV2575D2T-ADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV2575D2T-ADJ is usually 5 days.
3.What payment methods are accepted for NCV2575D2T-ADJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV2575D2T-ADJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV2575D2T-ADJ?
NCV2575D2T-ADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV2575D2T-ADJ 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-ADJ?
For technical support, including NCV2575D2T-ADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV2575D2T-ADJ requirements.
6.How does Aetrix verify that NCV2575D2T-ADJ is sourced from the original manufacturer or authorized distributors?
All NCV2575D2T-ADJ 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-ADJ meets industry standards.
7.What is the process for return or replacement of NCV2575D2T-ADJ?
All NCV2575D2T-ADJ units undergo pre-shipment inspection (PSI). If there is an issue with NCV2575D2T-ADJ, 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-ADJ part is unused and in its original packaging.
Return procedure for NCV2575D2T-ADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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