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onsemi NCP5663DS15R4G
- Part No.:
- NCP5663DS15R4G
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
NCP5663DS15R4G.pdf
- Description:
- IC REG LINEAR 1.5V 3A D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,847
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Product details
Overview
NCP5663DS15R4G from onsemi is a fixed-output, 1.5 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 where fast transient response and tight voltage accuracy are critical.
For engineers reviewing the NCP5663DS15R4G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 1.5 V ±1% output accuracy over −40°C to +150°C, thermal shutdown at 160°C, error flag activation at 91–97% of nominal VOUT, and compatibility with low-ESR ceramic output capacitors ≥10 µF.
Technical Context
The NCP5663DS15R4G implements a bipolar-based LDO architecture with a 0.9 V internal reference, enabling stable 1.5 V output via trimmed resistor network - not adjustable externally. Its error flag circuitry monitors regulated output continuously and asserts logic-low when VOUT falls below 91% of nominal, requiring only a 100 kΩ pull-up to VIN.
Thermal protection uses junction-sensing with 160°C trip point and automatic recovery; ground current remains ≤3.0 mA at 3.0 A load and drops to ≤300 µA in disable state. Input voltage range is 2.0 V to 9.0 V, supporting wide-input post-regulation from intermediate bus converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±1% at TJ = 25°C; ±1.5% over −20°C to +125°C - ensures stable core supply for low-voltage ASICs |
| Max Output Current | 3.0 A continuous - supports high-current FPGA I/O banks or GPU memory rails |
| Dropout Voltage | 1.0 V typical at 3.0 A (Vin ≥ 2.5 V) - enables operation from 2.5 V input with 1.5 V output |
| Output Noise | 28 µVrms (10 Hz–100 kHz), no bypass cap required - eliminates need for external noise-filtering components |
| PSRR | ≥65 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters |
| Error Flag Threshold | 91–97% of VOUT - provides precise undervoltage detection before system-level fault escalation |
| Enable Threshold | VEN(HI) ≥ 1.3 V, VEN(LO) ≤ 0.3 V - compatible with standard 3.3 V or 1.8 V GPIO control |
| Thermal Shutdown | 160°C junction - protects against sustained overload or inadequate heatsinking in enclosed systems |
Pinout & Package
D2PAK-5 (Case 936A) thermally enhanced surface-mount package with exposed tab electrically connected to Pin 3 (Ground); requires minimum 625 mm² copper pour for RθJA = 45°C/W performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Enable | Active-high digital control input; ties to Vin for always-on operation or to MCU GPIO for sequenced power-up |
| 2 | Vin | Main input supply (2.0–9.0 V); must be decoupled with ≥150 µF OSCON capacitor near pin |
| 3 | Ground | Power ground and thermal path; tab is electrically tied to this pin - must be soldered to large copper area |
| 4 | Vout | Regulated 1.5 V output; connects directly to load with low-inductance path to minimize transient droop |
| 5 | Error Flag | Open-collector output; sinks current when Vout < 91% nominal - requires external 100 kΩ pull-up to Vin |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast load transient response | Settles within 1–3 µs after 10 mA ↔ 3.0 A step - maintains voltage stability during burst-mode processor activity |
| Low ground current at full load | ≤3.0 mA at 3.0 A output - minimizes wasted power in high-current applications |
| Fixed 1.5 V output with precision trimming | ±1% initial accuracy, ±1.5% over industrial temp range - eliminates external feedback resistors and calibration |
| Integrated error flag with blanking | 50 µs blanking time prevents false triggers during startup or brief transients - improves system reliability |
| Pb-free D2PAK package | RoHS-compliant, halogen-free, with G suffix marking - meets environmental compliance for global OEM production |
Applications
| Server CPU Core Rails | ASIC Post-Regulation |
|---|---|
Use Scenario: Providing clean, tightly regulated 1.5 V supply to multi-core CPU voltage domains during dynamic frequency scaling. IC Role / Device Role / Timing Role: Primary low-noise, high-current LDO delivering final-stage regulation after bulk DC/DC conversion. Use Value: 28 µVrms noise and 1–3 µs transient response prevent timing violations and logic errors under rapid load changes. | Use Scenario: Powering configurable logic blocks in high-end ASICs where supply tolerance must stay within ±1.5% across temperature. IC Role / Device Role / Timing Role: Fixed-output LDO with embedded error flag used for real-time supply health monitoring in mission-critical data paths. Use Value: Error flag activates at 91–97% VOUT with 50 µs blanking - enables early fault detection without false alarms during normal operation. |
| Networking Switch Fabric | Gaming Console Memory Subsystem |
Use Scenario: Supplying SerDes PHYs and packet buffer interfaces in 10/25/100 GbE switches operating in thermally constrained chassis. IC Role / Device Role / Timing Role: High-current LDO with thermal shutdown (160°C) and low dropout (1.0 V typ.) enabling compact, fanless designs. Use Value: D2PAK package with RθJC = 5.0°C/W allows direct heatsink mounting - sustains 3.0 A output at ambient up to 85°C. | Use Scenario: Delivering 1.5 V to GDDR6 memory controllers in next-gen gaming consoles requiring sub-2% voltage deviation during burst access. IC Role / Device Role / Timing Role: Precision LDO with ±1% output accuracy and PSRR >65 dB at 1 kHz suppressing DC/DC ripple from main power stage. Use Value: Eliminates need for additional LC filtering - reduces BOM count and PCB area while meeting JEDEC memory timing specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS7A8300RGRT | 3.0 A, 1.5 V fixed, 0.8 V dropout @ 3 A, but requires external bypass capacitor for low noise; no error flag | Lacks integrated error flag and blanking - needs external supervisor IC for fault reporting | Choose if lower dropout is prioritized and system already includes voltage monitoring |
| STMicro STLQ015M15R | 1.5 A max, 1.5 V fixed, 0.3 V dropout, SOT-223 package - lower current, smaller footprint, no error flag | Not suitable for 3.0 A loads; limited thermal capability in small package | Choose only for space-constrained, lower-power subsystems where 1.5 A suffices |
Compared with TPS7A8300RGRT and STLQ015M15R, the NCP5663DS15R4G uniquely combines 3.0 A capability, integrated error flag with blanking, and 28 µVrms noise without bypass capacitor - making it optimal for high-reliability, high-current applications requiring autonomous fault signaling.
Availability
NCP5663DS15R4G is available at Aetrix Electronics and suitable for server power supplies, ASIC post-regulation, and networking equipment requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for NCP5663DS15R4G 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, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The NCP5663DS15R4G belongs to onsemi's high-current LDO family designed specifically for demanding power integrity applications in servers, telecom infrastructure, and high-performance computing - emphasizing ultra-low noise, fast transient response, and robust thermal protection.
FAQ
What is the maximum input voltage rating for the NCP5663DS15R4G?
The NCP5663DS15R4G has an absolute maximum input voltage (VIN) of 18 V, but its recommended operating input range is 2.0 V to 9.0 V per the Electrical Characteristics table. Operation above 9.0 V may compromise output accuracy and thermal margin, and is not validated for continuous use. The device's bipolar process supports reliable 18 V transient tolerance, but sustained operation should remain within the 2.0–9.0 V specification to ensure 1.5 V output stability and longevity of the NCP5663DS15R4G.
Does the NCP5663DS15R4G require an external bypass capacitor to achieve its specified 28 µVrms noise performance?
No, the NCP5663DS15R4G achieves 28 µVrms output noise (10 Hz–100 kHz) without any external bypass capacitor - a key differentiator confirmed in the datasheet Features section and Electrical Characteristics tables. This eliminates BOM cost and layout area typically needed for noise reduction. The NCP5663DS15R4G's internal architecture inherently suppresses noise, and adding a bypass capacitor does not improve this spec. Designers can rely on the stated 28 µVrms performance using only the recommended 150 µF input and ≥10 µF output ceramic capacitors.
How does the Error Flag pin on the NCP5663DS15R4G behave during startup and transient events?
The Error Flag pin on the NCP5663DS15R4G is an open-collector output that pulls low when VOUT drops below 91–97% of nominal (i.e., 1.365–1.455 V for 1.5 V output). It includes a 50 µs blanking time to suppress false triggers during startup overshoot or brief load-induced dips - explicitly documented in Note 4 of the datasheet. During normal operation, the flag remains high; during sustained undervoltage, it asserts low with ≤200 mV saturation voltage at 1.0 mA sink current. No action is required from the NCP5663DS15R4G user to enable blanking - it is built-in and active by default.
What thermal derating applies to the NCP5663DS15R4G when mounted on a standard 1 oz. copper PCB without an external heatsink?
When mounted on a standard 1 oz. copper PCB with a 625 mm² thermal pad (per datasheet Note 2), the NCP5663DS15R4G has RθJA = 45°C/W. At 3.0 A output with 1.0 V dropout (3.0 W dissipation), junction temperature rise is 135°C above ambient. With max TJ = 150°C, this limits ambient operation to ≤15°C without forced air - confirming that practical use requires either reduced load, increased copper area, or heatsinking. The NCP5663DS15R4G's RθJC = 5.0°C/W enables effective heatsink coupling via the exposed tab, which is essential for full 3.0 A operation in real-world enclosures.
Is the NCP5663DS15R4G pin-compatible with other members of the NCP5663 family, such as the adjustable version NCP5663DSADJR4G?
No, the NCP5663DS15R4G is not pin-compatible with the adjustable version NCP5663DSADJR4G. Although both use the same D2PAK-5 package and share Pins 1–4 (Enable, Vin, Ground, Vout), Pin 5 serves opposite functions: Error Flag (fixed-output NCP5663DS15R4G) versus Adj (adjustable version). Interchanging them will cause functional failure - the fixed version expects a pull-up on Pin 5 for fault reporting, while the adjustable version requires a resistor divider. The NCP5663DS15R4G's marking "DS15" and datasheet ordering table explicitly confirm its fixed 1.5 V identity and dedicated Error Flag pinout.
NCP5663DS15R4G 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
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 9V
- Voltage - Output (Min/Fixed):
- 1.5V
- 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
NCP5663DS15R4G FAQ
1.How can I place an order for NCP5663DS15R4G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP5663DS15R4G 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 NCP5663DS15R4G reliable?
The price and inventory of NCP5663DS15R4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP5663DS15R4G is usually 5 days.
3.What payment methods are accepted for NCP5663DS15R4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP5663DS15R4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP5663DS15R4G?
NCP5663DS15R4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP5663DS15R4G 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 NCP5663DS15R4G?
For technical support, including NCP5663DS15R4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP5663DS15R4G requirements.
6.How does Aetrix verify that NCP5663DS15R4G is sourced from the original manufacturer or authorized distributors?
All NCP5663DS15R4G 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 NCP5663DS15R4G meets industry standards.
7.What is the process for return or replacement of NCP5663DS15R4G?
All NCP5663DS15R4G units undergo pre-shipment inspection (PSI). If there is an issue with NCP5663DS15R4G, 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 NCP5663DS15R4G part is unused and in its original packaging.
Return procedure for NCP5663DS15R4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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