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onsemi NCV5661MN25T2G
- Part No.:
- NCV5661MN25T2G
- Manufacturer:
- onsemi
- Package:
- 6-VDFN Exposed Pad
- Datasheet:
-
NCV5661MN25T2G.pdf
- Description:
- IC REG LINEAR 2.5V 1A 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,657
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Product details
Overview
NCV5661MN25T2G from onsemi is an automotive-grade, fixed-output 2.5 V, 1.0 A low-dropout linear regulator in a thermally enhanced DFN6 3×3.3 mm package. It delivers ultra-fast load transient response (1–3 µs settling), 26 µVrms output noise without bypass capacitor, and dropout voltage of 1.0 V at full load - enabling stable post-regulation for ASICs and networking equipment in harsh environments.
For engineers reviewing the NCV5661MN25T2G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q100 qualification, error flag functionality (active-low at 88% of Vout), thermal shutdown at 160°C, ground current ≤3.0 mA at 1.0 A, and compatibility with low-ESR ceramic output capacitors ≥10 µF.
Technical Context
The NCV5661MN25T2G implements a precision 0.9 V internal reference with feedback loop architecture optimized for fast transient recovery under dynamic load steps. Its error flag circuitry monitors regulated output voltage continuously and asserts logic-low after 50 µs blanking time when Vout falls below 88% of nominal 2.5 V - independent of input ripple or short-duration transients.
Thermal design leverages the DFN6 package's 18°C/W junction-to-lead resistance and supports >1.0 A continuous operation with ≥1 in² copper area. Ground current remains constant (≤3.0 mA) across full 10 mA–1.0 A load range, decoupling quiescent power from output demand - critical for battery-sensitive automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±1% at 25°C; ±2% over −40°C to +150°C - ensures tight regulation for 2.5 V I/O rails in automotive ECUs. |
| Max Output Current | 1.0 A continuous - sufficient for powering FPGA I/O banks or high-speed SerDes termination circuits. |
| Dropout Voltage | 1.0 V typical at 1.0 A - enables operation from 3.5 V input (e.g., automotive 5 V rail derated under cold-crank) while maintaining regulation. |
| PSRR | ≥65 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters feeding sensitive analog or RF subsystems. |
| Noise | 26 µVrms (10 Hz–100 kHz) - eliminates need for external bypass capacitor, reducing BOM count and PCB area. |
| Error Flag Threshold | 88% of Vout (2.2 V) with 50 µs blanking - prevents false triggering during load-step-induced dips while ensuring reliable fault detection. |
| Enable Threshold | Logic-high ≥1.3 V, logic-low ≤0.3 V - compatible with 1.8 V/3.3 V GPIOs for controlled power sequencing in multi-rail systems. |
Pinout & Package
NCV5661MN25T2G uses the DFN6 3.0×3.3 mm, 0.95 mm pitch package (Case 506AX) with exposed thermal pad (Pin 4/EPAD) for enhanced heat dissipation. The package is Pb-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Enable (EN) | Active-high digital control input; tie to VIN for always-on operation or drive with microcontroller GPIO for power sequencing. |
| 2 | Input Voltage (VIN) | Primary power input (2.0–9.0 V); requires ≥150 µF low-ESR OSCON input capacitor if source impedance exceeds 50 mΩ. |
| 3 | Ground (GND) | Power ground reference; must be connected to low-impedance PCB plane and tied directly to EPAD for thermal and noise integrity. |
| 4 | EPAD / Thermal Pad | Internally connected to GND; soldered to ≥1 in² copper pour to achieve RθJL = 18°C/W and sustain 1.0 A continuous load. |
| 5 | Output Voltage (VOUT) | Regulated 2.5 V output; requires ≥10 µF ceramic capacitor (ESR < 300 mΩ) placed within 3 mm of pin for stability and transient response. |
| 6 | Error Flag (EF) | Open-drain output asserting logic-low when VOUT < 2.2 V; requires external 100 kΩ pull-up to VIN for system fault monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast transient response | 1–3 µs settling time enables stable operation under rapid load steps common in burst-mode processors and DDR memory controllers. |
| Low-noise operation without bypass cap | 26 µVrms noise eliminates need for dedicated 10 nF ceramic bypass capacitor - simplifies layout and reduces component count. |
| Load-independent ground current | ≤3.0 mA max across 10 mA–1.0 A load range - maintains predictable power budget in battery-powered telematics modules. |
| AEC-Q100 qualified | Qualified to Grade 1 (−40°C to +125°C ambient) with PPAP capability - meets functional safety requirements for automotive body control and ADAS sub-systems. |
| Integrated protection | Thermal shutdown (160°C), current limit (1.5 A peak), and error flag provide autonomous fault containment without external supervision. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power |
|---|---|
|
Use Scenario: Powering CAN transceiver bias rails and microcontroller I/O banks in vehicle door modules subject to cold-crank (4.5 V min) and load-dump transients. IC Role / Device Role / Timing Role: Primary 2.5 V LDO delivering clean, regulated power with error flag signaling undervoltage events to MCU for graceful shutdown. Use Value: 1.0 V dropout allows operation down to 3.5 V input; AEC-Q100 qualification ensures reliability across 15-year vehicle lifecycle. |
Use Scenario: Providing isolated 2.5 V supply for analog sensor front-ends and ADC reference in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Post-regulator following a 5 V DC-DC converter, rejecting switching noise via 65 dB PSRR and delivering low-noise bias for 16-bit precision measurements. Use Value: 26 µVrms noise eliminates need for additional filtering; thermal robustness sustains 1.0 A load in enclosed 70°C cabinet environments. |
| Networking Switch ASIC Core Supply | Gaming Console Memory Interface |
|
Use Scenario: Local regulation for 2.5 V I/O domains in multi-gigabit Ethernet switch ASICs experiencing high-frequency load transients during packet bursts. IC Role / Device Role / Timing Role: Fast-response LDO compensating for IR drop and noise on main 3.3 V rail, with error flag triggering firmware throttling on sustained undervoltage. Use Value: 1–3 µs transient settling prevents timing violations in SerDes lanes; enable pin allows dynamic power gating during link idle states. |
Use Scenario: Powering GDDR6 memory termination and command/address buffers in high-performance gaming consoles where EMI and thermal density are critical. IC Role / Device Role / Timing Role: Low-noise, high-current LDO supplying 2.5 V to memory interface ICs adjacent to GPU die, minimizing crosstalk-induced jitter. Use Value: DFN6 3×3.3 mm footprint saves space in dense SoC packages; 18°C/W RθJL enables direct thermal coupling to heatsink via EPAD. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73325PDBVR | Lower IQ (25 µA), lower current (300 mA), no error flag, SOT-23-5 package. | Suitable for low-power microcontrollers but cannot replace NCV5661MN25T2G in 1.0 A ASIC or networking loads. | Select only for space-constrained, low-IQ applications where 300 mA suffices and fault reporting is unnecessary. |
| NCP1117ST25T3G | Higher dropout (1.2 V @ 1 A), no enable or error flag, TO-220/SOT-223, 1.0 A rated. | Compatible for basic 2.5 V regulation but lacks automotive qualification, fast transient response, and system-monitoring features. | Use only in non-automotive industrial settings where AEC-Q100, enable control, and error reporting are not required. |
Compared with TLV73325PDBVR and NCP1117ST25T3G, the NCV5661MN25T2G uniquely combines automotive qualification, 1.0 A capability, ultra-fast transient response, and integrated error flag - making it irreplaceable for safety-critical, high-dynamic-load automotive and networking applications requiring both performance and diagnostics.
Availability
NCV5661MN25T2G is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O power supplies, and networking switch ASIC core supplies requiring stable component supply with long-term lifecycle assurance.
Supply support for NCV5661MN25T2G 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 specializing in energy-efficient silicon solutions for automotive, industrial, cloud computing, and IoT applications.
The NCV5661 series belongs to onsemi's automotive-qualified LDO portfolio, engineered specifically for high-current, low-noise, fault-aware power regulation in demanding vehicular and industrial control systems.
FAQ
What is the maximum input voltage rating for the NCV5661MN25T2G?
The NCV5661MN25T2G has an absolute maximum input voltage rating of 18 V. However, for reliable continuous operation, the recommended input voltage range is 2.0 V to 9.0 V - aligning with its intended use as a post-regulator downstream of primary DC-DC converters in automotive and industrial systems. Exceeding 9.0 V may increase power dissipation beyond thermal limits without proportional benefit.
Does the NCV5661MN25T2G require an external bypass capacitor for low-noise operation?
No, the NCV5661MN25T2G achieves 26 µVrms output noise (10 Hz–100 kHz) without any external bypass capacitor. This is enabled by its internal noise-reduction architecture and precision bandgap reference. Adding a bypass capacitor does not improve noise performance and is unnecessary - reducing BOM cost and PCB real estate.
How does the error flag on the NCV5661MN25T2G behave during load transients?
The NCV5661MN25T2G error flag includes a 50 µs blanking time to ignore brief output voltage dips caused by normal load transients. It only asserts logic-low when VOUT remains below 88% of 2.5 V (i.e., <2.2 V) for longer than 50 µs - distinguishing true fault conditions (e.g., short circuit, input collapse) from benign dynamic behavior.
What thermal performance can be expected from the NCV5661MN25T2G in a standard PCB layout?
With a minimum 1 in² copper area connected to the EPAD (Pin 4), the NCV5661MN25T2G achieves RθJL = 18°C/W. At 1.0 A load and 25°C ambient, junction temperature rise is ~18°C - well within its −40°C to +150°C operating range. Reducing copper area increases thermal resistance proportionally; 0.26 in² yields RθJA = 82°C/W per datasheet Note 2.
Is the NCV5661MN25T2G pin-compatible with other members of the NCV5661 family?
Yes - all DFN6-packaged NCV5661 variants (e.g., NCV5661MN12T2G, NCV5661MN33T2G) share identical pinout, footprint, and thermal pad configuration. Only the fixed output voltage differs; no PCB redesign is needed when migrating between 1.2 V, 1.5 V, 1.8 V, 2.5 V, 2.8 V, 3.0 V, or 3.3 V versions of the NCV5661MNxxT2G series.
NCV5661MN25T2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 9V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.3V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 3 mA
- Current - Supply (Max):
- -
- PSRR:
- 70dB ~ 65dB (120Hz ~ 1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (3x3.3)
NCV5661MN25T2G FAQ
1.How can I place an order for NCV5661MN25T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV5661MN25T2G 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 NCV5661MN25T2G reliable?
The price and inventory of NCV5661MN25T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV5661MN25T2G is usually 5 days.
3.What payment methods are accepted for NCV5661MN25T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV5661MN25T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV5661MN25T2G?
NCV5661MN25T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV5661MN25T2G 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 NCV5661MN25T2G?
For technical support, including NCV5661MN25T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV5661MN25T2G requirements.
6.How does Aetrix verify that NCV5661MN25T2G is sourced from the original manufacturer or authorized distributors?
All NCV5661MN25T2G 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 NCV5661MN25T2G meets industry standards.
7.What is the process for return or replacement of NCV5661MN25T2G?
All NCV5661MN25T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV5661MN25T2G, 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 NCV5661MN25T2G part is unused and in its original packaging.
Return procedure for NCV5661MN25T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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