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onsemi NCV2575D2T-12R4G
- Part No.:
- NCV2575D2T-12R4G
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
NCV2575D2T-12R4G.pdf
- Description:
- IC REG BUCK 12V 1A D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:798
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Product details
Overview
NCV2575D2T-12R4G from onsemi is an automotive-grade monolithic step-down (buck) switching regulator IC delivering 1.0 A output current with fixed 12 V output, 52 kHz internal oscillator, ±4% output voltage tolerance over line/load/temperature, and wide 4.75 V to 40 V input range. It integrates a 1.0 A NPN switch, error amplifier, 1.23 V reference, thermal shutdown, cycle-by-cycle current limiting, and TTL-compatible ON/OFF control - used in vehicle body control modules, infotainment power rails, and ADAS sensor supplies.
For engineers reviewing the NCV2575D2T-12R4G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 1.0 A output under −40°C to +125°C junction temperature, no external compensation required, minimal external component count (only 4), and AEC-Q100 qualification for automotive reliability.
Technical Context
The NCV2575D2T-12R4G implements a voltage-mode controlled buck converter with fixed-frequency (52 kHz) PWM operation, internal 1.23 V bandgap reference, and integrated 1.0 A NPN output switch. Its feedback loop uses direct sensing of regulated output via Pin 4, eliminating need for external divider in fixed-output variants.
Thermal shutdown activates at TJ ≥ 150°C; current limit triggers at peak switch current of 1.4–3.2 A depending on temperature. Standby quiescent current is 15–400 µA when ON/OFF pin is high, enabling low-power sleep modes in automotive ECUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±4% over −40°C to +125°C, 0.2–1.0 A load, 15–40 V input - ensures stable MCU/SOC core rail without trimming. |
| Output Current | Guaranteed 1.0 A continuous - supports single-rail powering of microcontrollers, CAN transceivers, or display drivers. |
| Input Voltage Range | 4.75 V to 40 V - accommodates cold-crank (4.75 V) and load-dump (40 V) conditions per ISO 7637-2. |
| Oscillator Frequency | 52 kHz ±10% (±2% from 0°C to 125°C) - enables use of low-cost, high-saturation-current inductors with minimal EMI filtering. |
| Efficiency | 88% typical at Vin = 15 V, IOUT = 1.0 A - reduces thermal load vs. linear regulators, often eliminating heatsink requirement. |
| Quiescent Current | 5.0–11 mA active mode; 15–400 µA standby - meets automotive module sleep-current budgets (<100 µA). |
| Junction Temp Range | −40°C to +125°C - qualified for under-hood and cabin-mounted automotive applications per AEC-Q100 Grade 1. |
Pinout & Package
D2PAK (TO-263-5) package with exposed thermal pad connected to Pin 3 (GND); heatsink surface electrically tied to ground for optimal thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive input supply | Accepts 4.75–40 V unregulated DC; requires low-ESR input capacitor (≥100 µF) placed adjacent to pin to suppress switching transients. |
| 2 - Output | Emiter of internal NPN switch | Delivers regulated 12 V; PCB copper area must be minimized to reduce coupling into sensitive analog circuits. |
| 3 - GND | Circuit ground / thermal pad connection | Single-point ground reference; exposed pad soldered to large copper pour for thermal dissipation (RθJC = 5.0°C/W). |
| 4 - Feedback | Regulated output sense node | Internally connected to 12 V divider; unused in fixed-output version - must be left open or grounded per datasheet guidance. |
| 5 - ON/OFF | TTL-compatible enable/disable control | Logic-low (≤0.8 V) enables regulation; logic-high (≥2.4 V) disables output and reduces IQ to ≤400 µA. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Grade 1 (−40°C to +125°C), PPAP-capable - certified for safety-critical automotive subsystems including lighting and gateway modules. |
| Integrated protection | Thermal shutdown + cycle-by-cycle current limiting - prevents damage during short-circuit, overload, or ambient overheating without external circuitry. |
| Minimal BOM | Only 4 external components required (inductor, catch diode, input/output capacitors) - accelerates design cycle and reduces bill-of-material cost. |
| Low EMI design | Fixed 52 kHz frequency + optimized internal gate drive - simplifies compliance with CISPR 25 Class 5 radiated emissions limits. |
| Pb-free & MSL-1 | Moisture Sensitivity Level 1 - allows standard reflow without baking; RoHS-compliant for global automotive supply chains. |
Applications
| Automotive Body Control Module (BCM) | Infotainment System Power Rail |
|---|---|
Use Scenario: Supplies 12 V to microcontroller, LIN transceivers, and LED drivers in door modules and seat controllers. IC Role / Device Role / Timing Role: Primary buck regulator converting battery voltage (9–16 V) to stable 12 V rail with transient immunity during cranking. Use Value: Maintains operation down to 4.75 V input and survives 40 V load-dump spikes without latch-up or reset. |
Use Scenario: Powers audio DSP, touchscreen controller, and USB hub in head unit with low-noise requirements. IC Role / Device Role / Timing Role: Pre-regulator stepping down 12 V battery to clean 12 V intermediate rail before LDO post-regulation. Use Value: 88% efficiency minimizes heat near temperature-sensitive displays; fixed frequency simplifies EMI filter design. |
| ADAS Camera Sensor Supply | Telematics Control Unit (TCU) |
Use Scenario: Provides 12 V bias to image sensor and ISP in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: High-reliability DC-DC stage meeting ASIL-B functional safety constraints via AEC-Q100 qualification. Use Value: −40°C to +125°C operation ensures startup in extreme climates; thermal shutdown prevents field failures. |
Use Scenario: Powers cellular modem, GNSS receiver, and CAN interface in fleet management units mounted in trunk or under-seat locations. IC Role / Device Role / Timing Role: Main power converter enabling low-quiescent sleep mode (<100 µA) during vehicle ignition-off periods. Use Value: Standby current as low as 15 µA extends battery life during multi-week parking; ON/OFF pin enables firmware-controlled wake-up. |
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 | Industrial-grade (non-AEC-Q100), same electrical specs but rated −40°C to +125°C without automotive qualification testing. | Lacks PPAP documentation and automotive stress test validation - suitable only for non-safety-critical industrial or consumer designs. | Select when AEC-Q100 is not mandated and cost sensitivity outweighs automotive traceability requirements. |
| NCV8843PD2R2G | Higher efficiency (92% typ.), 2.0 A output, 2.2 MHz switching, but requires external compensation and more complex layout. | Targets space-constrained, high-efficiency applications like radar modules where thermal density matters more than BOM simplicity. | Choose when >1.0 A output or >500 kHz frequency is required; avoid if minimizing design time and component count is priority. |
Compared with LM2575D2T-12G, NCV2575D2T-12R4G adds automotive qualification and tighter production controls; compared with NCV8843PD2R2G, it trades higher efficiency and current for proven simplicity, lower EMI risk, and reduced layout sensitivity - ideal for cost-optimized, volume automotive power rails.
Availability
NCV2575D2T-12R4G is available at Aetrix Electronics and suitable for automotive body electronics, infotainment systems, and ADAS sensor power supplies requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for NCV2575D2T-12R4G 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, with deep expertise in automotive, industrial, and cloud power solutions.
The NCV2575 series belongs to onsemi's automotive analog power portfolio, designed specifically to replace linear regulators in harsh-environment vehicle subsystems while meeting AEC-Q100 reliability and ISO 16750 electrical stress requirements.
FAQ
What is the maximum input voltage rating for the NCV2575D2T-12R4G?
The NCV2575D2T-12R4G has an absolute maximum input voltage of 45 V, with recommended operating range up to 40 V. This allows robust operation during automotive load-dump events per ISO 7637-2 Pulse 5a, and supports wide-input applications such as 24 V commercial vehicles when derated appropriately.
Does the NCV2575D2T-12R4G require external feedback resistors?
No - the NCV2575D2T-12R4G is a fixed 12 V output variant; its internal resistor divider sets the output voltage, so Pin 4 (Feedback) is not connected externally. Datasheet Figure 14 confirms Feedback pin is left open or grounded for fixed-output versions, eliminating tuning complexity and drift-related errors.
What thermal performance can be expected from the NCV2575D2T-12R4G in a D2PAK package?
With proper PCB copper pour on the exposed thermal pad (Pin 3), the NCV2575D2T-12R4G achieves RθJC = 5.0°C/W and RθJA ≈ 70°C/W. At 1.0 A output and 12 V input, typical power dissipation is ~1.2 W, resulting in <100°C junction rise above ambient - often eliminating need for external heatsink in well-ventilated automotive enclosures.
Is the NCV2575D2T-12R4G pin-compatible with other LM2575/NCV2575 variants?
Yes - all LM2575 and NCV2575 devices in D2PAK (D2T suffix) share identical pinout, footprint, and thermal pad configuration. The NCV2575D2T-12R4G can directly replace LM2575D2T-12G or NCV2575D2T-5G on the same board, provided input/output capacitor and inductor values match the 12 V output requirements.
How does the ON/OFF pin function on the NCV2575D2T-12R4G?
The ON/OFF pin (Pin 5) enables logic-level control: ≤0.8 V (TTL low) enables regulation; ≥2.4 V (TTL high) disables the internal switch and reduces quiescent current to ≤400 µA. This allows microcontroller-driven power sequencing and ultra-low-power sleep states in automotive modules without external MOSFETs or level shifters.
NCV2575D2T-12R4G 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:
- 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-12R4G FAQ
1.How can I place an order for NCV2575D2T-12R4G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV2575D2T-12R4G 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-12R4G reliable?
The price and inventory of NCV2575D2T-12R4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV2575D2T-12R4G is usually 5 days.
3.What payment methods are accepted for NCV2575D2T-12R4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV2575D2T-12R4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV2575D2T-12R4G?
NCV2575D2T-12R4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV2575D2T-12R4G 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-12R4G?
For technical support, including NCV2575D2T-12R4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV2575D2T-12R4G requirements.
6.How does Aetrix verify that NCV2575D2T-12R4G is sourced from the original manufacturer or authorized distributors?
All NCV2575D2T-12R4G 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-12R4G meets industry standards.
7.What is the process for return or replacement of NCV2575D2T-12R4G?
All NCV2575D2T-12R4G units undergo pre-shipment inspection (PSI). If there is an issue with NCV2575D2T-12R4G, 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-12R4G part is unused and in its original packaging.
Return procedure for NCV2575D2T-12R4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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