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onsemi NCP5663DS18G
- Part No.:
- NCP5663DS18G
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
NCP5663DS18G.pdf
- Description:
- IC REG LINEAR 1.8V 3A D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,249
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Product details
Overview
NCP5663DS18G from onsemi is a fixed-output, 1.8 V, 3.0 A ultra-low-dropout linear regulator in D2PAK package, featuring 1.0 V typical dropout at full load, 28 µVrms output noise without bypass capacitor, and integrated Enable and Error Flag functions - deployed in server power rails and ASIC post-regulation.
For engineers reviewing the NCP5663DS18G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 1.8 V ±1% accuracy over −40°C to +150°C, thermal shutdown at 160°C, low ground current (≤3.0 mA at 3.0 A), and error flag threshold at 91–97% of nominal output.
Technical Context
The NCP5663DS18G implements a bipolar-based LDO architecture with a 0.9 V internal reference, enabling stable 1.8 V output via trimmed resistor network - not adjustable externally. Its error flag pin asserts logic low when output falls below 91% of 1.8 V, requiring external 100 kΩ pull-up.
Thermal protection activates at 160°C junction temperature, and current limiting clamps peak output to 4.5 A. Input voltage range is 2.0 V to 9.0 V, with PSRR >65 dB at 1 kHz and ripple rejection >70 dB at 120 Hz - optimized for noisy intermediate bus environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1% at TJ = 25°C; ±2% over −40°C to +150°C - ensures tight regulation for core logic supplies. |
| Max Output Current | 3.0 A continuous - supports high-current FPGA/ASIC core rails without external pass devices. |
| Dropout Voltage | 1.0 V typical at 3.0 A - enables operation from 2.8 V input to deliver 1.8 V, minimizing power loss. |
| Output Noise | 28 µVrms (10 Hz–100 kHz) - eliminates need for noise-reduction bypass capacitor in space-constrained designs. |
| Ground Current | ≤3.0 mA at 3.0 A load - remains constant across load, simplifying thermal modeling and efficiency calculation. |
| Error Flag Threshold | 91–97% of Vout - provides early warning of output sag before functional failure in mission-critical systems. |
| Enable Threshold | VEN(H) ≥1.3 V, VEN(L) ≤0.3 V - compatible with standard 1.8 V/3.3 V logic control signals. |
Pinout & Package
D2PAK-5 (Case 936A), thermally enhanced surface-mount package with exposed tab tied to GND - delivers RθJC = 5.0°C/W for high-power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Enable | Active-high digital control input; device disabled when pulled ≤0.3 V - enables system-level power sequencing. |
| 2 | Vin | Main input supply (2.0–9.0 V); requires 150 µF OSCON input capacitor for stability and transient response. |
| 3 | Ground | Power ground reference and thermal path; tab is electrically connected to Pin 3 - must be soldered to large copper pour. |
| 4 | Vout | Regulated 1.8 V output; stable with 10–150 µF output capacitance and 50–300 mΩ ESR. |
| 5 | Error Flag | Open-collector output asserting low when Vout < 91% of 1.8 V - requires external 100 kΩ pull-up to Vin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast transient response | Settles within 1–3 µs during 10 mA ↔ 3.0 A load steps - maintains voltage integrity for burst-mode processors. |
| Low-noise operation | 28 µVrms without bypass cap - reduces BOM count and PCB area in compact server modules. |
| Load-independent quiescent current | ≤3.0 mA up to 3.0 A - enables accurate efficiency prediction across full load range. |
| Integrated fault signaling | Error Flag with 50 µs blanking time - prevents false triggers during benign transients while enabling real-time rail monitoring. |
| Robust thermal protection | 160°C shutdown with hysteresis - prevents catastrophic failure under sustained overload or poor heatsinking. |
Applications
| Server VRM Post-Regulation | ASIC Core Power Supply |
|---|---|
Use Scenario: Final-stage regulation for 1.8 V I/O or auxiliary rails in dual-socket server motherboards. IC Role / Device Role / Timing Role: Low-noise, high-current LDO delivering clean 1.8 V from intermediate 3.3 V or 5 V bus. Use Value: Eliminates need for additional filtering stages; 28 µVrms noise meets PCIe Gen5 reference clock jitter budgets. | Use Scenario: Dedicated 1.8 V supply for FPGA configuration banks or SerDes auxiliary circuits. IC Role / Device Role / Timing Role: Precision voltage source with error flag for health monitoring in reconfigurable logic subsystems. Use Value: ±1% output accuracy ensures reliable I/O voltage margining; error flag feeds FPGA supervisory logic for autonomous recovery. |
| Networking Equipment Power | Gaming/STB Module Regulation |
Use Scenario: Point-of-load regulation for 1.8 V PHY interfaces in 10G Ethernet switches. IC Role / Device Role / Timing Role: Fast-transient LDO maintaining voltage during packet-burst traffic-induced load swings. Use Value: 1–3 µs settling time prevents link flapping; 3.0 A rating supports multi-port PHY concurrency. | Use Scenario: Stable 1.8 V rail for video decoder SoCs in set-top boxes and gaming consoles. IC Role / Device Role / Timing Role: Thermally robust regulator operating continuously at elevated ambient temperatures (up to 85°C). Use Value: RθJC = 5.0°C/W and 150°C max TJ enable operation in sealed enclosures without forced air cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV5663DS18G | AEC-Q100 qualified, automotive-grade variant with identical electrical specs and 125°C extended temp range. | Required for automotive infotainment modules; not rated for 150°C industrial operation. | Select NCV5663DS18G only when PPAP documentation and automotive qualification are mandatory. |
| TPS7A8300RGRT | 3.0 A, 1.8 V fixed LDO with 0.6 V dropout, 6.5 µVrms noise, but no error flag and 2.5 V min input. | Better noise and dropout, but lacks fault reporting - unsuitable where rail health monitoring is required. | Choose TPS7A8300RGRT for ultra-low-noise applications without error detection needs; verify input voltage compatibility. |
Compared with NCP5663DS18G, NCV5663DS18G adds automotive qualification but sacrifices 150°C operation, while TPS7A8300RGRT improves noise and dropout yet omits error flag functionality - making NCP5663DS18G the sole option combining 3.0 A, 1.8 V, error flag, and 150°C capability.
Availability
NCP5663DS18G is available at Aetrix Electronics and suitable for server VRMs, ASIC power supplies, and networking equipment requiring stable component supply with long-term industrial lifecycle support.
Supply support for NCP5663DS18G 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, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The NCP5663DS18G belongs to onsemi's high-current LDO family designed specifically for demanding server, networking, and high-performance computing applications where precision, reliability, and thermal resilience are critical.
FAQ
What is the maximum input voltage rating for the NCP5663DS18G?
The NCP5663DS18G has an absolute maximum input voltage (Vin) rating of 18 V, but its recommended operating input range is 2.0 V to 9.0 V per the Electrical Characteristics table. Exceeding 9.0 V may degrade performance or reliability, even if below the 18 V absolute limit - always maintain Vin ≤9.0 V in normal operation for NCP5663DS18G.
Does the NCP5663DS18G require an external bypass capacitor to achieve its specified 28 µVrms noise performance?
No, the NCP5663DS18G achieves 28 µVrms output noise without any external bypass capacitor - a key design advantage confirmed in the Features section and Electrical Characteristics table. This eliminates BOM cost and PCB area typically needed for noise reduction, making NCP5663DS18G ideal for space-constrained server and networking modules.
How does the Error Flag pin on the NCP5663DS18G behave during normal operation and fault conditions?
During normal operation, the Error Flag pin on the NCP5663DS18G remains logic high (open-collector, pulled up externally). When output voltage drops below 91% of 1.8 V (i.e., <1.638 V), it asserts logic low with ≤200 mV saturation voltage at 1.0 mA sink current. The NCP5663DS18G includes 50 µs blanking time to suppress false triggers during fast transients.
What is the thermal resistance and maximum junction temperature specification for the NCP5663DS18G?
The NCP5663DS18G has a thermal resistance of RθJC = 5.0°C/W (junction-to-case) and RθJA = 45°C/W (junction-to-air, measured with 625 mm² copper pour). Its maximum operating junction temperature is +150°C, with thermal shutdown activated at 160°C - ensuring safe operation under sustained 3.0 A loads when properly mounted on adequate copper.
Can the NCP5663DS18G be used in automotive applications?
The NCP5663DS18G is not AEC-Q100 qualified and is intended for industrial/commercial use. For automotive applications, onsemi offers the pin-compatible NCV5663DS18G variant - which shares identical electrical specs but adds AEC-Q100 qualification, PPAP capability, and extended −40°C to +125°C operating range. Use NCP5663DS18G only in non-automotive systems.
NCP5663DS18G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 9V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.3V @ 3A
- Current - Output:
- 3A
- 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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-5
NCP5663DS18G FAQ
1.How can I place an order for NCP5663DS18G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP5663DS18G 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 NCP5663DS18G reliable?
The price and inventory of NCP5663DS18G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP5663DS18G is usually 5 days.
3.What payment methods are accepted for NCP5663DS18G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP5663DS18G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP5663DS18G?
NCP5663DS18G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP5663DS18G 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 NCP5663DS18G?
For technical support, including NCP5663DS18G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP5663DS18G requirements.
6.How does Aetrix verify that NCP5663DS18G is sourced from the original manufacturer or authorized distributors?
All NCP5663DS18G 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 NCP5663DS18G meets industry standards.
7.What is the process for return or replacement of NCP5663DS18G?
All NCP5663DS18G units undergo pre-shipment inspection (PSI). If there is an issue with NCP5663DS18G, 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 NCP5663DS18G part is unused and in its original packaging.
Return procedure for NCP5663DS18G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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