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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

onsemi NCP5662DS25R4G

Name: NCP5662DS25R4G
Brand: onsemi
SKU: NCP5662DS25R4G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NCP5662DS25R4G

Manufacturer:: onsemi

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: TO-263-6, D2PAK (5 Leads + Tab), TO-263BA

Datasheet:: NCP5662DS25R4G.pdf

Description:: IC REG LINEAR 2.5V 2A D2PAK-5

Quantity:: RFQ Add To RFQ list

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Product details

Overview

NCP5662DS25R4G from onsemi is a fixed-output, 2.5 V, 2.0 A low-dropout linear regulator in D2PAK-5 package, featuring ultra-fast load transient response (1–3 µs settling), 26 µV_rms output noise without bypass capacitor, and integrated Enable and Error Flag functions. It delivers stable power for high-current ASIC core rails and post-regulation in servers and networking equipment.

For engineers reviewing the NCP5662DS25R4G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage ≤1.3 V at 2.0 A, ground current ≤3.0 mA under full load, error flag threshold at 91–97% of V_OUT, thermal resistance R_JA = 45 °C/W, and Pb-free D2PAK packaging with exposed thermal pad.

Technical Context

The NCP5662DS25R4G implements a bipolar-based LDO architecture with a 0.9 V internal reference and precision error amplifier, enabling stable 2.5 V output regulation across −40°C to +85°C ambient. Its ultra-fast transient response stems from high-gain control loop design and low-output-impedance output stage, optimized for dynamic loads up to 2.0 A.

It integrates dual protection: current limiting (3.0 A internal clamp) and thermal shutdown at 160°C, with an Error Flag (EF) pin that asserts logic-low when output falls below 91–97% of nominal 2.5 V - requiring external 100 kΩ pull-up. The Enable (EN) pin supports logic-level on/off control with 0.3 V/1.3 V thresholds.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.5 V ±2% over −40°C to +150°C junction temperature, ensuring tight rail accuracy for sensitive digital cores.
Max Output Current	2.0 A continuous, supporting high-power FPGA/ASIC core supplies without derating at TA ≤85°C with proper heatsinking.
Dropout Voltage	1.0 V typical / 1.3 V max at 2.0 A, allowing operation with Vin as low as 3.5 V while maintaining regulation.
Ground Current	≤3.0 mA at 2.0 A load, independent of output current - critical for efficiency in battery-backed or always-on systems.
Noise (RMS)	26 µV_rms (10 Hz–100 kHz), enabling clean power delivery to RF/analog sections without external bypass capacitor.
PSRR	>65 dB at 1 kHz, suppressing switching noise from upstream DC-DC converters in multi-rail power architectures.
Error Flag Threshold	91–97% of V_OUT (i.e., 2.275–2.425 V), providing precise undervoltage detection for system-level fault monitoring.

Pinout & Package

D2PAK-5 (Case 936A−02) thermally enhanced package with exposed tab connected to GND; requires minimum 1 sq-in copper pour (1 oz) for R_JA = 45 °C/W performance.

Pin/Terminal	Circuit Role	Design Meaning
1	EF (Error Flag)	Open-drain output asserting logic-low when V_OUT drops below 91–97% of 2.5 V; requires external 100 kΩ pull-up to Vin.
2	Vin	Main input supply (2–9 V); pins 5 and 6 are internally tied to this node in DFN8 but not present in D2PAK - only pin 2 serves Vin here.
3 & Tab	GND	Power ground and thermal path; exposed tab must be soldered to PCB ground plane for thermal integrity.
4	Vout	Regulated 2.5 V output; connects directly to load; layout requires short, wide trace to minimize inductance.
5	EN (Enable)	Logic-controlled on/off input; device enabled when EN ≥1.3 V, disabled when EN ≤0.3 V; float-high default if unused.

Key Features

Feature	Design Value
Ultra-fast transient response	1–3 µs settling time enables stable operation under sudden 2.0 A → 10 mA load steps in CPU/GPU power domains.
Low-noise operation	26 µV_rms noise without bypass capacitor reduces BOM count and PCB area in space-constrained server modules.
Load-independent ground current	3.0 mA max at full 2.0 A load improves light-load efficiency vs. conventional LDOs with current-proportional quiescent draw.
Integrated error flag	Dedicated EF pin provides system-level fault signaling without external supervision IC, simplifying power-good monitoring.
Thermal robustness	R_JC = 5.0 °C/W and R_JL = 7.0 °C/W enable >3 W dissipation capability with minimal heatsink in D2PAK package.

Applications

Server Core Power	ASIC Post-Regulation
Use Scenario: Providing clean, tightly regulated 2.5 V supply to high-speed memory interfaces (e.g., DDR4 I/O rails) in 1U rack servers. IC Role / Device Role / Timing Role: Final-stage LDO delivering low-noise, fast-transient power with error flag for memory controller fault reporting. Use Value: 26 µV_rms noise and 1–3 µs response prevent bit errors during burst data transfers; EF pin triggers platform firmware alert on rail collapse.	Use Scenario: Regulating output of a primary DC-DC converter to supply configurable logic blocks in Xilinx Kintex FPGAs. IC Role / Device Role / Timing Role: Precision post-regulator ensuring 2.5 V ±2% stability across temperature and load for FPGA configuration and I/O banks. Use Value: 1.3 V max dropout allows use with 3.3 V intermediate bus; PSRR >65 dB suppresses switching ripple from upstream buck converter.
Networking Line Card	Gaming Console SoC Rail
Use Scenario: Powering SerDes PHYs and packet buffer controllers on 10G Ethernet line cards operating in extended temperature environments. IC Role / Device Role / Timing Role: High-current LDO supplying 2.5 V to high-speed transceivers with thermal shutdown and enable sequencing support. Use Value: R_JA = 45 °C/W and −40°C to +85°C rating ensure reliability in fanless telecom enclosures; EN pin enables hot-swap control.	Use Scenario: Delivering 2.5 V to GPU voltage domains in next-gen gaming consoles where rapid load changes occur during shader-intensive rendering. IC Role / Device Role / Timing Role: Ultra-fast transient LDO maintaining rail integrity during GPU clock/voltage scaling events. Use Value: 1–3 µs settling time prevents GPU throttling or frame stutter; 2.0 A capacity supports peak shader cluster currents.

Server Core Power

ASIC Post-Regulation

Use Scenario: Providing clean, tightly regulated 2.5 V supply to high-speed memory interfaces (e.g., DDR4 I/O rails) in 1U rack servers.

IC Role / Device Role / Timing Role: Final-stage LDO delivering low-noise, fast-transient power with error flag for memory controller fault reporting.

Use Value: 26 µV_rms noise and 1–3 µs response prevent bit errors during burst data transfers; EF pin triggers platform firmware alert on rail collapse.

Use Scenario: Regulating output of a primary DC-DC converter to supply configurable logic blocks in Xilinx Kintex FPGAs.

IC Role / Device Role / Timing Role: Precision post-regulator ensuring 2.5 V ±2% stability across temperature and load for FPGA configuration and I/O banks.

Use Value: 1.3 V max dropout allows use with 3.3 V intermediate bus; PSRR >65 dB suppresses switching ripple from upstream buck converter.

Networking Line Card

Gaming Console SoC Rail

Use Scenario: Powering SerDes PHYs and packet buffer controllers on 10G Ethernet line cards operating in extended temperature environments.

IC Role / Device Role / Timing Role: High-current LDO supplying 2.5 V to high-speed transceivers with thermal shutdown and enable sequencing support.

Use Value: R_JA = 45 °C/W and −40°C to +85°C rating ensure reliability in fanless telecom enclosures; EN pin enables hot-swap control.

Use Scenario: Delivering 2.5 V to GPU voltage domains in next-gen gaming consoles where rapid load changes occur during shader-intensive rendering.

IC Role / Device Role / Timing Role: Ultra-fast transient LDO maintaining rail integrity during GPU clock/voltage scaling events.

Use Value: 1–3 µs settling time prevents GPU throttling or frame stutter; 2.0 A capacity supports peak shader cluster currents.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS7A8300RGRT	2.5 V fixed, 3 A output, 0.6 V dropout, but higher ground current (1.2 mA typ at no load, rising with load) and no error flag.	Lacks EF pin; better suited for ultra-low-dropout needs where fault signaling is handled externally.	Choose TPS7A8300RGRT only if <0.8 V dropout is mandatory and EF functionality is redundant in system architecture.
MCP1826T-2502E/OT	2.5 V fixed, 2 A, DFN-8 package, 1.2 V dropout, no EF pin, 65 dB PSRR, but 10 µV_rms noise (lower than NCP5662DS25R4G).	Smaller footprint, lower noise, but lacks integrated fault reporting and has higher thermal resistance (R_JA ≈ 120 °C/W).	Select MCP1826T-2502E/OT for compact consumer designs where board space is constrained and EF is unnecessary.

Compared with TPS7A8300RGRT and MCP1826T-2502E/OT, the NCP5662DS25R4G uniquely combines error flag signaling, ultra-fast transient response, and D2PAK thermal performance - making it optimal for industrial and telecom systems requiring both reliability and real-time fault awareness.

Availability

NCP5662DS25R4G is available at Aetrix Electronics and suitable for server power delivery, ASIC post-regulation, and networking equipment requiring stable component supply with automotive-grade traceability and long-term lifecycle support.

Supply support for NCP5662DS25R4G 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.

The NCP5662 series belongs to onsemi's high-current LDO portfolio, engineered specifically for demanding power integrity requirements in servers, base stations, and high-performance computing where ultra-fast transient response and integrated fault monitoring are essential.

FAQ

What is the maximum input voltage rating for the NCP5662DS25R4G?

The NCP5662DS25R4G has an absolute maximum input voltage rating of 18 V. However, its recommended operating input range is 2 V to 9 V - with minimum Vin determined by dropout voltage: Vin ≥ V_OUT + V_DO (≥3.5 V at 2.0 A). Exceeding 9 V may increase power dissipation beyond safe limits without adequate heatsinking.

Does the NCP5662DS25R4G require an external bypass capacitor to achieve its specified 26 µV_rms noise performance?

No, the NCP5662DS25R4G achieves 26 µV_rms output noise (10 Hz–100 kHz) without any external bypass capacitor - a key design advantage confirmed in the datasheet's Electrical Characteristics table and Typical Characteristics Figure 16. This eliminates BOM cost and PCB area typically needed for noise reduction.

How does the Error Flag (EF) pin on the NCP5662DS25R4G behave during startup and fault conditions?

The EF pin on the NCP5662DS25R4G is an open-drain output that remains high-impedance until regulation is achieved. Once V_OUT reaches ≥97% of 2.5 V, EF goes high (via external pull-up). If V_OUT drops below 91% of 2.5 V - due to overload, short, or input collapse - EF pulls low within 50 µs blanking time, signaling fault to host controller.

Can the NCP5662DS25R4G be used in automotive applications?

The NCP5662DS25R4G is not AEC-Q100 qualified; for automotive use, the pin-compatible NCV5662DS25R4G (with NCV prefix) is specified - it shares identical electrical specs but adds PPAP capability, unique site controls, and extended −40°C to +125°C operating range. NCP5662DS25R4G is rated for −40°C to +85°C and intended for industrial/commercial systems.

What thermal design guidance applies to the NCP5662DS25R4G in D2PAK package?

For the NCP5662DS25R4G in D2PAK, thermal design requires soldering the exposed tab to a minimum 1 sq-in copper area (1 oz thickness) to achieve R_JA = 45 °C/W. Without this, R_JA degrades significantly. Power dissipation must stay below P_D = (150°C − T_A) / 45 °C/W; at 85°C ambient, max continuous P_D ≈ 1.44 W - sufficient for ~1.1 A at 1.3 V dropout.

NCP5662DS25R4G 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):: 2.5V

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

NCP5662DS25R4G FAQ

1.How can I place an order for NCP5662DS25R4G through Aetrix?

Please submit a Request for Quotation (RFQ) for NCP5662DS25R4G 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 NCP5662DS25R4G reliable?

The price and inventory of NCP5662DS25R4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP5662DS25R4G is usually 5 days.

3.What payment methods are accepted for NCP5662DS25R4G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP5662DS25R4G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NCP5662DS25R4G?

NCP5662DS25R4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCP5662DS25R4G 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 NCP5662DS25R4G?

For technical support, including NCP5662DS25R4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP5662DS25R4G requirements.

6.How does Aetrix verify that NCP5662DS25R4G is sourced from the original manufacturer or authorized distributors?

All NCP5662DS25R4G 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 NCP5662DS25R4G meets industry standards.

7.What is the process for return or replacement of NCP5662DS25R4G?

All NCP5662DS25R4G units undergo pre-shipment inspection (PSI). If there is an issue with NCP5662DS25R4G, 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 NCP5662DS25R4G part is unused and in its original packaging.

Return procedure for NCP5662DS25R4G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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