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onsemi NCP5662DS12R4G
- Part No.:
- NCP5662DS12R4G
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
NCP5662DS12R4G.pdf
- Description:
- IC REG LINEAR 1.2V 2A D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,530
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Product details
Overview
NCP5662DS12R4G from onsemi is a fixed-output, 1.2 V, 2.0 A ultra-fast transient response low-dropout linear regulator in D2PAK 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. It is designed for post-regulation in high-current server and ASIC power supplies where tight voltage accuracy and rapid load-step recovery are critical.
For engineers reviewing the NCP5662DS12R4G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 1.2 V ±1% output tolerance over temperature, thermal shutdown at 160°C, ground current ≤3.0 mA at full load, and error flag threshold at 91–97% of nominal output - all validated for industrial ambient range (−40°C to +85°C).
Technical Context
The NCP5662DS12R4G implements a bipolar-based LDO architecture with a 0.9 V internal reference and precision error amplifier driving a high-current output stage. Its ultra-fast transient response (settling within 1–3 µs) stems from adaptive biasing and optimized loop compensation, independent of external capacitor ESR.
It integrates dual protection: foldback current limiting (3.0 A internal limit) and thermal shutdown (160°C junction). The Error Flag pin asserts logic-low when output falls below 91–97% of 1.2 V, requiring only a 100 kΩ pull-up - no external sensing circuitry needed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±1% at 25°C; ±1.5% over −40°C to +85°C - ensures stable core voltage for 1.2 V FPGA/ASIC rails. |
| Max Output Current | 2.0 A continuous - supports high-density digital loads without derating at 85°C ambient. |
| Dropout Voltage | 1.0 V typical at 2.0 A - enables operation from 2.2 V input, critical for multi-rail systems with tight Vin–Vout margins. |
| Ground Current | ≤3.0 mA at 2.0 A load - minimizes quiescent power loss and improves efficiency at full load. |
| Noise (RMS) | 26 µVrms (10 Hz–100 kHz) - eliminates need for noise-reduction bypass capacitor, saving board space and BOM cost. |
| PSRR | >65 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Error Flag Threshold | 91–97% of 1.2 V (1.092–1.164 V) - provides precise undervoltage detection before system-level malfunction occurs. |
Pinout & Package
D2PAK (TO-263-5) thermally enhanced surface-mount package with exposed tab connected to GND. Optimized for high-power dissipation: RJA = 45°C/W (with 1 in² copper), RJC = 5.0°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | EN | Active-high enable input; logic-high ≥1.3 V enables regulation; tie to VIN if unused - enables system-level power sequencing control. |
| 2 | VIN | Main input supply (2–9 V); pins 5 and 6 internally tied in DFN8 but externally bonded together in D2PAK - requires robust PCB trace for 2 A current path. |
| 3 & Tab | GND | Power ground and thermal pad connection point - tab must be soldered to large copper pour for thermal performance. |
| 4 | VOUT | Regulated 1.2 V output; low-impedance source capable of 2.0 A - requires low-ESR ceramic output capacitor placed adjacent to pin. |
| 5 | EF | Error Flag open-drain output; pulls low when VOUT < 1.092 V - requires external 100 kΩ pull-up to VIN for monitoring by host microcontroller. |
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 - essential for burst-mode processors. |
| Low-noise operation | 26 µVrms without bypass capacitor eliminates need for secondary filtering components - reduces solution size and cost. |
| Load-independent ground current | 3.0 mA max across 0–2.0 A load - maintains predictable power budget and thermal profile regardless of dynamic current demand. |
| Integrated error flag | Dedicated EF pin with 50 µs blanking time prevents false triggers during benign transients - simplifies system fault detection without firmware overhead. |
| Thermal robustness | 160°C thermal shutdown with hysteresis - protects against sustained overload while allowing safe restart after cooldown. |
Applications
| Server VRM Post-Regulation | ASIC Core Power Supply |
|---|---|
Use Scenario: Final-stage regulation for 1.2 V FPGA or CPU core rail after primary multiphase buck converter. IC Role / Device Role / Timing Role: Low-noise, high-current LDO providing ripple-free 1.2 V with fast transient recovery to maintain timing margin during logic state changes. Use Value: 26 µVrms noise and sub-µs transient response prevent jitter-induced setup/hold violations in high-speed digital interfaces. | Use Scenario: Dedicated 1.2 V supply for ASIC I/O or memory interface blocks requiring clean, sequenced voltage rails. IC Role / Device Role / Timing Role: Enable-controlled LDO delivering precise 1.2 V with error flag for real-time health monitoring during power-up and runtime. Use Value: ±1% output accuracy and EF pin assertion at 1.092 V enable deterministic power-good signaling for FPGA configuration and state-machine initialization. |
| Networking Equipment PoL | Gaming STB Module Regulation |
Use Scenario: Point-of-load regulation for 1.2 V SerDes or PHY circuits in 10G/25G switch line cards. IC Role / Device Role / Timing Role: High-PSRR LDO rejecting noise from shared 3.3 V or 5 V backplane supplies while maintaining strict 1.2 V tolerance. Use Value: >65 dB PSRR at 1 kHz suppresses switching artifacts from adjacent DC-DC converters, ensuring BER compliance in high-speed serial links. | Use Scenario: Main 1.2 V supply for SoC subsystems in set-top boxes or gaming consoles with thermal constraints. IC Role / Device Role / Timing Role: Thermally efficient D2PAK LDO with 45°C/W RJA, enabling 2.0 A delivery in compact, fanless enclosures. Use Value: Exposed thermal tab and 160°C shutdown allow reliable operation in sealed consumer enclosures without forced airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A8300RGRT | Lower dropout (0.6 V typ at 2 A), higher PSRR (75 dB @ 1 kHz), but 1.2 V version not standard - requires external resistor network. | Requires design-in of feedback resistors; lacks integrated EF pin; tighter thermal limits (RJA = 60°C/W). | Choose when lowest possible dropout or highest PSRR is mandatory and EF monitoring is unnecessary. |
| MCP1826T-1202E/DB | Same 1.2 V fixed output, 2 A rating, DFN-8 package, but slower transient response (>10 µs) and higher noise (45 µVrms). | No error flag; no thermal shutdown hysteresis; limited to +125°C max junction - less robust for industrial ambient. | Choose for cost-sensitive, space-constrained designs where ultra-fast response and EF are not required. |
Compared with TPS7A8300RGRT and MCP1826T-1202E/DB, the NCP5662DS12R4G uniquely combines integrated error flag, sub-µs transient response, and D2PAK thermal performance - making it optimal for mission-critical 1.2 V rails where reliability and dynamic behavior are prioritized over minimal footprint or lowest dropout.
Availability
NCP5662DS12R4G is available at Aetrix Electronics and suitable for server VRMs, ASIC core supplies, and networking equipment requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for NCP5662DS12R4G 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 NCP5662 series belongs to onsemi's high-current LDO portfolio, engineered specifically for post-regulation in high-performance computing and communications infrastructure where ultra-low noise, fast transient immunity, and fault visibility are non-negotiable.
FAQ
What is the maximum input voltage rating for the NCP5662DS12R4G?
The NCP5662DS12R4G has an absolute maximum input voltage of 18 V. However, its recommended operating input voltage range is 2 V to 9 V - with minimum Vin defined as (VOUT + VDO), i.e., ≥2.2 V for reliable 2.0 A operation at 1.2 V output. Operation above 9 V is electrically possible but not characterized for performance or lifetime.
Does the NCP5662DS12R4G require an external bypass capacitor to achieve its specified 26 µVrms noise performance?
No, the NCP5662DS12R4G achieves 26 µVrms output noise without any external bypass capacitor - a key differentiator confirmed in the datasheet's Electrical Characteristics table and Typical Characteristics (Figures 16–17). This eliminates BOM cost and layout area typically needed for noise reduction in high-precision LDOs.
How does the Error Flag (EF) pin on the NCP5662DS12R4G behave during startup and fault conditions?
The EF pin on the NCP5662DS12R4G is an open-drain output that remains high-impedance until regulation is established. Once active, it pulls low when VOUT drops below 91–97% of 1.2 V (1.092–1.164 V), with 50 µs blanking to ignore brief transients. During startup, EF stays high until VOUT reaches regulation; during overcurrent or thermal shutdown, EF asserts low to signal failure.
Can the NCP5662DS12R4G be used in automotive applications?
The NCP5662DS12R4G is the commercial-grade NCP variant rated for −40°C to +85°C ambient. For automotive use, onsemi offers the pin-compatible NCV5662DS12R4G (AEC-Q100 qualified, −40°C to +125°C), which shares identical electrical specs but adds automotive-specific process controls and PPAP documentation support.
What thermal considerations apply when using the NCP5662DS12R4G at 2.0 A in a D2PAK package?
At 2.0 A with 1.0 V dropout (e.g., VIN = 2.2 V), power dissipation is ~2.0 W. With RJA = 45°C/W (1 in² copper), junction rise is ~90°C - keeping TJ well below the 150°C max. To ensure reliability, the exposed tab must be soldered to ≥1 in² of 1 oz copper; insufficient copper area increases RJA and risks thermal shutdown.
NCP5662DS12R4G 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):
- 1.2V
- 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
NCP5662DS12R4G FAQ
1.How can I place an order for NCP5662DS12R4G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP5662DS12R4G 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 NCP5662DS12R4G reliable?
The price and inventory of NCP5662DS12R4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP5662DS12R4G is usually 5 days.
3.What payment methods are accepted for NCP5662DS12R4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP5662DS12R4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP5662DS12R4G?
NCP5662DS12R4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP5662DS12R4G 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 NCP5662DS12R4G?
For technical support, including NCP5662DS12R4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP5662DS12R4G requirements.
6.How does Aetrix verify that NCP5662DS12R4G is sourced from the original manufacturer or authorized distributors?
All NCP5662DS12R4G 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 NCP5662DS12R4G meets industry standards.
7.What is the process for return or replacement of NCP5662DS12R4G?
All NCP5662DS12R4G units undergo pre-shipment inspection (PSI). If there is an issue with NCP5662DS12R4G, 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 NCP5662DS12R4G part is unused and in its original packaging.
Return procedure for NCP5662DS12R4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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