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onsemi NCV2575D2TADJR4G
- Part No.:
- NCV2575D2TADJR4G
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
NCV2575D2TADJR4G.pdf
- Description:
- IC REG BUCK ADJ 1A D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,210
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Product details
Overview
NCV2575D2TADJR4G from onsemi is an automotive-grade, adjustable-output step-down (buck) switching regulator IC capable of delivering 1.0 A continuous output current. It operates across a wide input voltage range of 4.75 V to 40 V, features a fixed 52 kHz internal oscillator, ±4% output voltage accuracy over line/load/temperature, and integrated thermal shutdown and cycle-by-cycle current limiting. It is used in vehicle body control modules for stable 5 V or 12 V rail generation from battery-supplied unregulated inputs.
For engineers reviewing the NCV2575D2TADJR4G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q100 qualification, D2PAK (TO-263) package with heatsink-connected pin 3, adjustable output range (1.23 V to 37 V), and compatibility with standard off-the-shelf inductors - critical for automotive power supply design validation and long-term component continuity.
Technical Context
The NCV2575D2TADJR4G implements a voltage-mode PWM buck controller with a 1.23 V internal bandgap reference, error amplifier, 52 kHz oscillator, and 1.0 A NPN bipolar output switch. Its feedback pin (Pin 4) directly interfaces with an external resistor divider to set output voltage, enabling precise regulation across temperature (−40°C to +125°C junction).
It integrates TTL-compatible ON/OFF control (Pin 5), delivering 80 µA standby quiescent current when disabled, and features self-protective frequency foldback (to ~18 kHz) during overload or short-circuit conditions - reducing average power dissipation without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.0 A continuous - supports mid-power automotive subsystems without external current boosting. |
| Input Voltage Range | 4.75 V to 40 V - accommodates cold-crank (4.5 V) and load-dump (40 V) transients per ISO 7637-2. |
| Output Voltage Accuracy | ±4% over line, load, and −40°C to +125°C - ensures stable microcontroller or sensor rail under real-world vehicle conditions. |
| Oscillator Frequency | 52 kHz (±10% at 25°C; ±21% over full temp range) - enables use of low-cost, high-saturation-current inductors with minimal EMI filtering. |
| Feedback Reference Voltage | 1.23 V (±2.7% over −40°C to +125°C) - sets minimum output at 1.23 V and defines R1/R2 ratio for programmable outputs up to 37 V. |
| Standby Quiescent Current | 80 µA typical at 25°C - allows low-power sleep mode in always-on vehicle networks (e.g., CAN wake-up circuits). |
| Saturation Voltage | 1.2 V max at 1.0 A and −40°C to +125°C - determines conduction loss and thermal rise in D2PAK package without heatsink. |
Pinout & Package
D2PAK (TO-263-5) package with exposed heatsink pad thermally and electrically connected to Pin 3 (GND). Mounting surface must be soldered to PCB copper pour for thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive input supply | Accepts 4.75–40 V DC; requires low-ESR input capacitor (≥100 µF) placed within 5 mm to minimize switching noise injection. |
| 2 - Output | Emitter of internal NPN switch | Drives inductor; PCB copper area must be minimized to reduce coupling into sensitive analog/feedback paths. |
| 3 - GND | Circuit ground / heatsink connection | Single-point ground reference; exposed pad must be soldered to ≥2 cm² internal/external copper for RθJA = 70°C/W. |
| 4 - Feedback | Error amplifier non-inverting input | Directly senses output via R1/R2 divider; trace must be short, shielded, and routed away from noisy nodes. |
| 5 - ON/OFF | Logic-enable control input | TTL-compatible: <1.2 V = ON, >2.4 V = OFF; draws ≤30 µA when active, enabling microcontroller-based power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Grade 1 (−40°C to +125°C), PPAP-capable - meets automotive reliability and traceability requirements for Tier 1 production. |
| Integrated protection | Cycle-by-cycle current limit (1.4–3.2 A peak), thermal shutdown, and frequency foldback - eliminates need for external fault-handling circuitry. |
| Low external part count | Only 4 components required: input cap, output cap, inductor, catch diode - reduces BOM cost and layout complexity. |
| Standard inductor support | Optimized for 330 µH (L330) and other values in Table 1/2 - enables sourcing from multiple vendors (Pulse, Renco, Coilcraft). |
| Moisture Sensitivity Level | MSL 1 - no bake requirement before reflow, simplifying SMT manufacturing flow. |
Applications
| Body Control Module (BCM) | Infotainment Power Supply |
|---|---|
Use Scenario: Regulating 12 V battery input to stable 5 V for microcontroller, CAN transceiver, and EEPROM in door module. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, low-noise 5 V rail with fast transient response to load steps from window motor actuation. Use Value: ±4% output accuracy and −40°C to +125°C operation ensure reliable MCU boot and CAN communication across all vehicle climates and duty cycles. |
Use Scenario: Generating 3.3 V from 12 V vehicle supply for display interface logic and audio codec in head unit. IC Role / Device Role / Timing Role: Adjustable buck converter configured with R1/R2 to deliver precise 3.3 V; ON/OFF pin synchronized to system sleep/wake signals. Use Value: 80 µA standby current extends battery life during vehicle off-state; D2PAK thermal performance avoids derating in confined infotainment enclosures. |
| Engine Control Unit (ECU) Pre-regulator | LED Lighting Driver Bias Supply |
Use Scenario: Stepping down 14 V alternator output to 8 V intermediate rail feeding linear LDOs for sensor analog front-ends. IC Role / Device Role / Timing Role: High-efficiency pre-regulator reducing heat dissipation vs. linear solution; handles 40 V load-dump transients without latch-up. Use Value: 40 V absolute max input rating and built-in thermal shutdown prevent field failures during alternator surge events. |
Use Scenario: Providing constant 15 V bias for LED driver ICs in adaptive front lighting systems (AFS). IC Role / Device Role / Timing Role: Adjustable buck stage configured for 15 V output; supplies clean, regulated voltage to current-mode LED controllers. Use Value: Fixed 52 kHz switching enables predictable EMI filter design; ±4% tolerance ensures consistent LED brightness across temperature and input variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575D2TADJR4G | Commercial grade (−40°C to +125°C), same electrical specs, non-AEC-Q100 | Not qualified for automotive production; suitable for industrial or prototyping use only | Select only if AEC-Q100 compliance is not required and cost sensitivity outweighs long-term supply assurance. |
| NCV8843PD2R2G | Higher efficiency (90%+), 2.0 A output, 200 kHz switching, SOIC-8 package | Requires smaller inductor/capacitor; lacks integrated catch diode driver; different pinout and control logic | Choose for space-constrained designs needing higher current or better light-load efficiency; redesign required. |
Compared with LM2575D2TADJR4G, the NCV2575D2TADJR4G adds automotive qualification and tighter production controls but shares identical electrical behavior; compared with NCV8843PD2R2G, it trades higher current and frequency for proven robustness, simpler magnetics, and direct drop-in replacement in legacy D2PAK layouts.
Availability
NCV2575D2TADJR4G is available at Aetrix Electronics and suitable for automotive body electronics, engine management subsystems, and infotainment power supplies requiring stable component supply across extended product lifecycles.
Supply support for NCV2575D2TADJR4G 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 innovation, with leadership in automotive, industrial, and cloud power solutions.
The NCV2575D2TADJR4G belongs to the NCV2575 automotive buck regulator family, designed specifically for under-hood and chassis-mounted power conversion where AEC-Q100 reliability, wide input range, and thermal resilience are mandatory.
FAQ
What is the maximum input voltage rating for the NCV2575D2TADJR4G?
The NCV2575D2TADJR4G has an absolute maximum input voltage rating of 45 V, with guaranteed operation up to 40 V across its full temperature range. This allows safe operation during ISO 7637-2 load-dump transients (up to 40 V for 400 ms), making it suitable for direct connection to vehicle battery rails without additional clamping circuitry.
Does the NCV2575D2TADJR4G require an external catch diode?
Yes, the NCV2575D2TADJR4G requires an external Schottky catch diode (e.g., 1N5819 or MBR320) connected between the Output (Pin 2) and GND (Pin 3). The IC contains only the NPN switch; the diode completes the buck converter's freewheeling path and must be rated for ≥1.2× the peak inductor current and ≥1.25× the maximum input voltage.
How is the output voltage set on the NCV2575D2TADJR4G?
The NCV2575D2TADJR4G uses an external resistor divider (R1 and R2) connected between Output (Pin 2), Feedback (Pin 4), and GND (Pin 3) to set output voltage per the formula VOUT = 1.23 V × (1 + R2/R1). R1 is typically 1.0 kΩ to 5.0 kΩ; R2 is selected to achieve the desired output (e.g., 1.23 V to 37 V range), using 1% metal film resistors for stability.
What thermal performance can be expected from the NCV2575D2TADJR4G in D2PAK package?
In the D2PAK (TO-263-5) package, the NCV2575D2TADJR4G has a junction-to-ambient thermal resistance (RθJA) of 70°C/W when mounted on a 2-layer PCB with ≥2 cm² copper pour connected to Pin 3. At 1.0 A output and 12 V input, typical power dissipation is ~1.2 W, resulting in ~84°C junction rise above ambient - well within the 150°C max rating when ambient stays below 66°C.
Is the NCV2575D2TADJR4G pin-compatible with the LM2575 series?
Yes, the NCV2575D2TADJR4G is functionally and pinout-compatible with the LM2575D2TADJR4G and other LM2575 variants in the same D2PAK package. It shares identical pin assignment (Vin, Output, GND, Feedback, ON/OFF), electrical characteristics, and application circuit topology - enabling direct substitution in existing LM2575 designs where automotive qualification is needed.
NCV2575D2TADJR4G 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
- 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
NCV2575D2TADJR4G FAQ
1.How can I place an order for NCV2575D2TADJR4G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV2575D2TADJR4G 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 NCV2575D2TADJR4G reliable?
The price and inventory of NCV2575D2TADJR4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV2575D2TADJR4G is usually 5 days.
3.What payment methods are accepted for NCV2575D2TADJR4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV2575D2TADJR4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV2575D2TADJR4G?
NCV2575D2TADJR4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV2575D2TADJR4G 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 NCV2575D2TADJR4G?
For technical support, including NCV2575D2TADJR4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV2575D2TADJR4G requirements.
6.How does Aetrix verify that NCV2575D2TADJR4G is sourced from the original manufacturer or authorized distributors?
All NCV2575D2TADJR4G 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 NCV2575D2TADJR4G meets industry standards.
7.What is the process for return or replacement of NCV2575D2TADJR4G?
All NCV2575D2TADJR4G units undergo pre-shipment inspection (PSI). If there is an issue with NCV2575D2TADJR4G, 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 NCV2575D2TADJR4G part is unused and in its original packaging.
Return procedure for NCV2575D2TADJR4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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