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onsemi NCP5662DS18R4G
- Part No.:
- NCP5662DS18R4G
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
NCP5662DS18R4G.pdf
- Description:
- IC REG LINEAR 1.8V 2A D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,583
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Product details
Overview
NCP5662DS18R4G from onsemi is a fixed-output, 1.8 V, 2.0 A ultra-fast transient response low dropout (LDO) linear regulator in D2PAK-5 package. It features 1.0 V typical dropout at 2.0 A load, 26 µVrms output noise without bypass capacitor, and integrated Enable and Error Flag functions. Designed for post-regulation in high-current server and ASIC power supplies.
For engineers reviewing the NCP5662DS18R4G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 1.8 V ±1% output accuracy over −40°C to +85°C, thermal shutdown at 160°C, and error flag activation at 91–97% of nominal output voltage.
Technical Context
The NCP5662DS18R4G implements a bipolar-based LDO architecture with a 0.9 V internal reference and precision error amplifier. Its ultra-fast transient response (1–3 µs settling time) is enabled by high-gain control loop design and low-ESR output capacitor compatibility (10–150 µF).
It integrates dual protection: current limiting at 3.0 A (peak) and thermal shutdown at 160°C. The Error Flag pin outputs open-drain logic-low when VOUT drops below 91–97% of 1.8 V, requiring an external 100 kΩ pull-up resistor for proper operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±1% at 25°C; ±1.5% over −40°C to +85°C - ensures stable core voltage for 1.8 V logic rails. |
| Max Output Current | 2.0 A continuous - supports high-current FPGA/ASIC core domains without derating at 85°C ambient. |
| Dropout Voltage | 1.0 V typical at 2.0 A - enables operation from 2.8 V input (e.g., 3.3 V rail minus dropout), minimizing power loss. |
| Ground Current | 1.3–3.0 mA at 2.0 A load - low quiescent current independent of load improves efficiency in battery-backed or always-on systems. |
| Noise Performance | 26 µVrms (10 Hz–100 kHz) - sufficient for noise-sensitive analog/RF subsystems without external bypass capacitor. |
| PSRR | >65 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters in multi-rail power architectures. |
| Error Flag Threshold | 91–97% of 1.8 V (1.64–1.75 V) - provides early warning of output collapse before system reset threshold is breached. |
Pinout & Package
Package: D2PAK-5 (Case 936A−02), thermally enhanced with exposed tab connected to GND. Thermal resistance RJA = 45°C/W (with 1 in² copper), RJC = 5.0°C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | EN (Enable) | Active-high logic input; device enabled when ≥1.3 V, disabled when ≤0.3 V - allows precise sequencing control in multi-rail systems. |
| 2 | Vin | Main input supply pin (2–9 V range); must be decoupled with 150 µF OSCON capacitor for optimal transient response. |
| 3 & Tab | GND | Power ground and thermal path; exposed tab must be soldered to large PCB copper area for thermal management. |
| 4 | Vout | Regulated 1.8 V output; requires 10–150 µF output capacitor with 50–300 mΩ ESR for stability. |
| 5 | EF (Error Flag) | Open-drain output; pulls low when Vout falls below 91–97% of 1.8 V - used for system fault monitoring or supervisor IC triggering. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast transient response | 1–3 µs settling time - maintains regulation during sudden 10 mA ↔ 2.0 A load steps common in CPU/FPGA burst modes. |
| Low-noise operation | 26 µVrms without bypass capacitor - eliminates need for extra 10 nF ceramic cap, reducing BOM count and board space. |
| Load-independent ground current | ≤3.0 mA up to 2.0 A - avoids efficiency degradation at light loads, critical for standby power compliance. |
| Integrated error flag | Programmable 91–97% Vout threshold with 50 µs blanking - prevents false triggers during brief transients while enabling reliable fault detection. |
| Thermal robustness | 160°C shutdown with 45°C/W RJA - sustains full 2.0 A load in compact heatsinkless designs up to 85°C ambient. |
Applications
| Server Core Power | ASIC Post-Regulation |
|---|---|
|
Use Scenario: Providing clean 1.8 V supply to high-performance CPU/GPU cores in 1U rack servers with tight thermal constraints. IC Role / Device Role / Timing Role: Final-stage LDO delivering regulated voltage after primary DC-DC conversion; handles dynamic current steps up to 2.0 A. Use Value: Ultra-fast transient response prevents brownout during core frequency scaling; low noise avoids jitter in clock distribution networks. |
Use Scenario: Tight-tolerance 1.8 V rail for advanced node ASICs (e.g., 7 nm/5 nm) requiring sub-2% output accuracy across temperature. IC Role / Device Role / Timing Role: Precision post-regulator ensuring stable I/O or core voltage despite upstream converter ripple and load variation. Use Value: ±1% output tolerance and >65 dB PSRR suppress switching noise from multiphase buck converters feeding the ASIC. |
| Networking Line Cards | Gaming Console SoC Supply |
|
Use Scenario: Powering 1.8 V SerDes and PHY interfaces on telecom line cards operating continuously at 70°C ambient. IC Role / Device Role / Timing Role: High-reliability LDO with thermal shutdown and error flag for remote fault reporting in carrier-grade equipment. Use Value: 160°C thermal shutdown and EF pin enable predictive maintenance; D2PAK package withstands sustained 2.0 A loads without derating. |
Use Scenario: Delivering 1.8 V to GPU or video processing units in gaming consoles with aggressive power cycling and thermal cycling. IC Role / Device Role / Timing Role: Enable-controlled LDO synchronized with system sleep/wake states to minimize idle power consumption. Use Value: Enable function reduces ground current to 10 µA in shutdown; fast turn-on supports <100 ms wake-from-sleep requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS7A8300RGRT | 1.8 V fixed, 3.0 A, 200 mV typical dropout, 4.5 µVrms noise - lower noise but higher cost and smaller 2.0 A max rating at 85°C. | Preferred for ultra-low-noise RF/analog sections; less suitable for sustained 2.0 A loads above 70°C due to thermal limits. | Select if noise <10 µVrms is mandatory and peak current ≤1.5 A; avoid for full 2.0 A server core use. |
| ROHM BD9E301NUX-E2 | 1.8 V fixed, 3.0 A, 300 mV dropout, no error flag, 60 µVrms noise - lacks EF pin and has higher noise than NCP5662DS18R4G. | Suitable for cost-sensitive consumer applications where fault monitoring is not required. | Choose for budget-constrained designs without system-level fault reporting; not recommended where error flag is needed for safety or diagnostics. |
Compared with TPS7A8300RGRT and BD9E301NUX-E2, the NCP5662DS18R4G uniquely balances 2.0 A capability, 26 µVrms noise, integrated error flag, and D2PAK thermal performance - making it optimal for industrial and telecom applications demanding reliability, diagnostics, and thermal headroom.
Availability
NCP5662DS18R4G is available at Aetrix Electronics and suitable for server power supplies, ASIC post-regulation, and networking equipment requiring stable component supply with long-term lifecycle support.
Supply support for NCP5662DS18R4G 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 IoT markets.
The NCP5662DS18R4G belongs to onsemi's high-current LDO family designed specifically for high-power digital loads - emphasizing ultra-fast transient response, thermal resilience, and system-level fault visibility via integrated error flag.
FAQ
What is the maximum input voltage rating for the NCP5662DS18R4G?
The NCP5662DS18R4G has an absolute maximum input voltage of 18 V. However, its recommended operating input voltage is 2.8 V to 9.0 V - calculated as (Vout + VDO) = 1.8 V + 1.0 V = 2.8 V minimum, with 9.0 V as the upper limit per datasheet specifications. Exceeding 9.0 V during normal operation risks exceeding safe power dissipation limits.
Does the NCP5662DS18R4G require an external bypass capacitor for low-noise operation?
No, the NCP5662DS18R4G delivers 26 µVrms output noise without any external bypass capacitor, thanks to its internal noise-reduction architecture. This eliminates the need for a dedicated 10 nF ceramic capacitor typically used with other LDOs, simplifying layout and reducing BOM cost while maintaining noise performance suitable for sensitive analog circuits.
How does the Error Flag (EF) pin on the NCP5662DS18R4G behave under fault conditions?
The EF pin on the NCP5662DS18R4G is an open-drain output that pulls low when the regulated 1.8 V output drops below 91–97% of nominal (1.64–1.75 V). It includes a 50 µs blanking time to ignore brief transients. An external 100 kΩ pull-up resistor to Vin is required for proper logic-level signaling; the pin remains high during normal regulation.
What thermal management is required for the NCP5662DS18R4G at full 2.0 A load?
At 2.0 A and 85°C ambient, the NCP5662DS18R4G dissipates ~2.0 W (assuming 1.0 V dropout). With RJA = 45°C/W, junction temperature rises ~90°C above ambient - reaching ~175°C, exceeding the 150°C max. Therefore, a minimum 1 in² (6.45 cm²) 1 oz copper pad connected to the exposed tab is mandatory to maintain RJA ≤ 45°C/W and keep TJ within spec.
Can the NCP5662DS18R4G be used in automotive applications?
The NCP5662DS18R4G is rated for −40°C to +85°C operation and is not AEC-Q100 qualified. For automotive use, onsemi offers the pin-compatible NCV5662DS18R4G (NCV prefix), which is AEC-Q100 qualified, PPAP capable, and rated for −40°C to +125°C ambient. The NCP5662DS18R4G should be limited to industrial and computing applications.
NCP5662DS18R4G 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):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.3V @ 2A
- Current - Output:
- 2A
- 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
NCP5662DS18R4G FAQ
1.How can I place an order for NCP5662DS18R4G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP5662DS18R4G 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 NCP5662DS18R4G reliable?
The price and inventory of NCP5662DS18R4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP5662DS18R4G is usually 5 days.
3.What payment methods are accepted for NCP5662DS18R4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP5662DS18R4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP5662DS18R4G?
NCP5662DS18R4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP5662DS18R4G 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 NCP5662DS18R4G?
For technical support, including NCP5662DS18R4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP5662DS18R4G requirements.
6.How does Aetrix verify that NCP5662DS18R4G is sourced from the original manufacturer or authorized distributors?
All NCP5662DS18R4G 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 NCP5662DS18R4G meets industry standards.
7.What is the process for return or replacement of NCP5662DS18R4G?
All NCP5662DS18R4G units undergo pre-shipment inspection (PSI). If there is an issue with NCP5662DS18R4G, 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 NCP5662DS18R4G part is unused and in its original packaging.
Return procedure for NCP5662DS18R4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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