My Inquiry
My Account
onsemi NCV5661MN28T2G
- Part No.:
- NCV5661MN28T2G
- Manufacturer:
- onsemi
- Package:
- 6-VDFN Exposed Pad
- Datasheet:
-
NCV5661MN28T2G.pdf
- Description:
- IC REG LINEAR 2.8V 1A 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
NCV5661MN28T2G from onsemi is an automotive-grade, fixed-output 2.8 V, 1.0 A low-dropout linear regulator in a thermally robust 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 low ground current (≤3.0 mA at full load), enabling stable power for ASIC core supplies and post-regulation in networking equipment.
For engineers reviewing the NCV5661MN28T2G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage ≤1.3 V at 1.0 A, AEC-Q100 qualification, Error Flag functionality, and thermal performance with RθJA = 82°C/W on 1 in² copper.
Technical Context
The NCV5661MN28T2G implements a precision 0.9 V internal reference with feedback loop architecture optimized for fast transient recovery-critical for powering digital loads with dynamic current demands. Its fixed 2.8 V output eliminates external resistor networks while retaining Enable control and Error Flag monitoring.
Thermal protection triggers at 160°C, and current limiting clamps peak output to 1.5 A. The device operates across −40°C to +150°C junction temperature and supports input voltages from 2.0 V to 9.0 V, with ripple rejection >65 dB at 1 kHz and >70 dB at 120 Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2% over −40°C to +150°C; enables direct replacement of adjustable LDOs in space-constrained designs. |
| Max Output Current | 1.0 A continuous; sufficient for FPGA I/O banks or microcontroller subsystems without derating at TJ ≤ 125°C. |
| Dropout Voltage | 1.0 V typical at 1.0 A (VIN − VOUT ≥ 1.5 V); allows operation with only 4.3 V input for 2.8 V rail. |
| Ground Current | ≤3.0 mA at 1.0 A load; independent of output current-reduces system quiescent power in always-on modules. |
| Noise (10 Hz–100 kHz) | 26 µVrms; meets low-noise requirements for analog sensor interfaces without requiring external bypass capacitors. |
| Error Flag Threshold | 88% of nominal VOUT (2.46 V); provides early warning of undervoltage before functional failure in safety-critical systems. |
| PSRR | >65 dB at 1 kHz; suppresses switching noise from upstream DC-DC converters in hybrid power architectures. |
| Enable Threshold | VEN(HI) = 1.3 V min; compatible with 1.8 V and 3.3 V logic families without level-shifting. |
Pinout & Package
NCV5661MN28T2G uses a Pb-free DFN6 (3.0 × 3.3 mm, 0.95 mm pitch) package with exposed thermal pad (EPAD) for enhanced heat dissipation. RθJA = 82°C/W on 1 in² copper; RθJL = 18°C/W to lead 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable Input | Active-high logic control: tie to VIN for always-on operation; pull to GND to disable regulator and reduce IQDS to ≤300 µA. |
| 2 (VIN) | Input Supply | Accepts 2.0–9.0 V; requires 150 µF OSCON input capacitor with ≤50 mΩ ESR for optimal transient immunity. |
| 3 (GND) | Power Ground | Common return path for input/output currents and thermal pad connection; must be low-impedance plane. |
| 4 (VOUT) | Regulated Output | Delivers fixed 2.8 V ±2%; stability guaranteed with COUT ≥ 10 µF and ESR < 300 mΩ (electrolytic) or ceramic. |
| 5 (EF) | Error Flag Output | Open-drain output pulled high externally (100 kΩ to VIN); asserts low when VOUT < 2.46 V (88% of 2.8 V). |
| 6 (EPAD) | Thermal Pad | Internally connected to GND; soldered to PCB copper area for thermal conduction-mandatory for rated 1.0 A operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast transient response | 1–3 µs settling time enables reliable power delivery to burst-mode processors and high-speed SerDes without undershoot. |
| Low-noise operation | 26 µVrms output noise without bypass capacitor simplifies layout and reduces BOM count in noise-sensitive analog subsystems. |
| AEC-Q100 qualified | Qualified per Grade 1 (−40°C to +125°C ambient) and PPAP-capable-meets automotive infotainment and ADAS module requirements. |
| Error Flag with blanking | 50 µs blanking time prevents false triggering during startup or load transients; supports fault logging and system-level diagnostics. |
| Thermally robust DFN6 | RθJL = 18°C/W to lead 2 enables 1.0 A operation with minimal PCB copper-ideal for compact industrial controllers. |
| Low ground current | 3.0 mA max at full load and 300 µA in shutdown-extends battery life in always-on telematics and gateway modules. |
Applications
| ASIC Core Power | Automotive Infotainment |
|---|---|
Use Scenario: Powers 2.8 V I/O banks of multi-core ASICs in server backplanes where load steps exceed 0.5 A/µs. IC Role / Device Role / Timing Role: Primary post-regulator delivering clean, low-noise 2.8 V supply with sub-3 µs recovery from 90% load step. Use Value: Prevents timing violations and data corruption during burst-mode operation without adding bulk capacitance. |
Use Scenario: Supplies 2.8 V rail to audio codec and display interface ICs in head-unit systems operating across −40°C to +85°C. IC Role / Device Role / Timing Role: AEC-Q100-compliant LDO providing fault-aware power with Error Flag reporting to MCU for diagnostic logging. Use Value: Enables ISO 26262 ASIL-B compliant monitoring of power integrity without external supervisor ICs. |
| Networking PHY Interface | Gaming Console I/O Hub |
Use Scenario: Regulates 2.8 V for Ethernet PHY transceivers in 10/100/1000BASE-T switches subject to EFT and surge events. IC Role / Device Role / Timing Role: Low-ESR-stable LDO with 70 dB ripple rejection at 120 Hz, rejecting noise from upstream flyback converters. Use Value: Maintains PHY link stability and BER < 10−12 under noisy power conditions without ferrite beads or LC filters. |
Use Scenario: Powers USB 3.0 hub controller and HDMI transmitter in gaming consoles requiring rapid enable/disable sequencing. IC Role / Device Role / Timing Role: Enable-controlled 2.8 V regulator with <300 µA shutdown current, synchronized to system sleep/wake states. Use Value: Reduces standby power by >95% versus always-on LDOs-extending console battery life in portable mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV5661MN30T2G | Fixed 3.0 V output; identical package, pinout, and specs except VOUT and EF threshold (88% of 3.0 V = 2.64 V). | Suitable where system requires 3.0 V logic interface instead of 2.8 V; no PCB change needed. | Select when migrating to 3.0 V I/O standards or replacing legacy 3.0 V regulators with same thermal profile. |
| TLD1124-1EP | 2.4 V fixed output, 1.2 A, AEC-Q100 Grade 0 (−40°C to +150°C), but lacks Error Flag and has higher ground current (5 mA). | Better suited for high-temp engine bay applications; not drop-in due to different VOUT, no EF pin, and larger dropout (1.5 V @ 1.2 A). | Choose only if 2.4 V rail is acceptable and extended temperature range outweighs loss of fault monitoring capability. |
Compared with NCV5661MN28T2G, NCV5661MN30T2G offers seamless 3.0 V compatibility with identical footprint and diagnostics, while TLD1124-1EP trades away error reporting and noise performance for wider temperature tolerance-making it a functional alternative only in non-diagnostic, high-temp contexts.
Availability
NCV5661MN28T2G is available at Aetrix Electronics and suitable for automotive infotainment, networking PHY interfaces, and ASIC core power applications requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for NCV5661MN28T2G 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 power management, analog, sensors, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The NCV5661 series belongs to onsemi's automotive-qualified LDO portfolio, designed specifically for high-current, low-noise, fault-aware power regulation in safety-critical and thermally constrained environments.
FAQ
What is the maximum input voltage rating for the NCV5661MN28T2G?
The NCV5661MN28T2G has an absolute maximum input voltage (VIN) of 18 V, but its recommended operating range is 2.0 V to 9.0 V per electrical characteristics. Exceeding 9.0 V may degrade output accuracy and increase ground current beyond spec limits, though the device remains protected up to 18 V by internal clamp structures.
Does the NCV5661MN28T2G require an external bypass capacitor for low-noise operation?
No-the NCV5661MN28T2G achieves 26 µVrms output noise (10 Hz–100 kHz) without any external bypass capacitor, thanks to its internal architecture and 0.9 V reference design. This eliminates a common BOM item and saves PCB space in noise-sensitive applications like audio codecs or ADC references.
How does the Error Flag pin on the NCV5661MN28T2G behave during startup?
The NCV5661MN28T2G incorporates a 50 µs Error Flag blanking time after enable assertion, preventing false low assertions during initial output ramp-up. Once settled, the EF pin remains high until VOUT drops below 2.46 V (88% of 2.8 V), then pulls low with <200 mV saturation voltage at 1.0 mA sink current.
Can the NCV5661MN28T2G be used in a 1.8 V input system?
No-the NCV5661MN28T2G requires a minimum input voltage of 2.0 V to maintain regulation. With a 2.8 V output, the minimum valid input is 2.0 V + VDO ≈ 3.0 V (typical dropout). At 1.8 V input, the device cannot regulate and will enter dropout or shut down depending on EN state and internal bias conditions.
What thermal performance can be expected from the NCV5661MN28T2G in a standard 4-layer PCB?
On a standard 4-layer board with 1 in² (645 mm²) of 1 oz copper connected to the EPAD, the NCV5661MN28T2G achieves RθJA = 82°C/W. At 1.0 A load with 1.0 V dropout (1.0 W dissipation), junction-to-ambient rise is ~82°C-allowing safe operation up to +68°C ambient while maintaining TJ ≤ 150°C.
NCV5661MN28T2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 9V
- Voltage - Output (Min/Fixed):
- 2.8V
- 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)
NCV5661MN28T2G FAQ
1.How can I place an order for NCV5661MN28T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV5661MN28T2G 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 NCV5661MN28T2G reliable?
The price and inventory of NCV5661MN28T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV5661MN28T2G is usually 5 days.
3.What payment methods are accepted for NCV5661MN28T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV5661MN28T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV5661MN28T2G?
NCV5661MN28T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV5661MN28T2G 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 NCV5661MN28T2G?
For technical support, including NCV5661MN28T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV5661MN28T2G requirements.
6.How does Aetrix verify that NCV5661MN28T2G is sourced from the original manufacturer or authorized distributors?
All NCV5661MN28T2G 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 NCV5661MN28T2G meets industry standards.
7.What is the process for return or replacement of NCV5661MN28T2G?
All NCV5661MN28T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCV5661MN28T2G, 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 NCV5661MN28T2G part is unused and in its original packaging.
Return procedure for NCV5661MN28T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NCV5661MN28T2G Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
