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onsemi NCP1086D2T-33R4G
- Part No.:
- NCP1086D2T-33R4G
- Manufacturer:
- onsemi
- Package:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Datasheet:
-
NCP1086D2T-33R4G.pdf
- Description:
- IC REG LINEAR 3.3V 1.5A D2PAK-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,949
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Product details
Overview
NCP1086D2T-33R4G from onsemi is a 3.3 V fixed-output, 1.5 A low-dropout linear regulator in D2PAK-3 package, featuring ±1.5% output voltage accuracy over temperature, 1.05 V typical dropout at full load, thermal shutdown, and current limiting. It serves as a post-regulator for microprocessor power supplies where stable low-voltage operation and fast transient response are critical.
For engineers reviewing the NCP1086D2T-33R4G datasheet, pinout, applications, or equivalent options, key selection considerations include dropout voltage at 1.5 A, thermal shutdown threshold (150–210°C), GND/VOUT/VIN pin configuration, and compatibility with tantalum output capacitors for stability in high-current load transients.
Technical Context
The NCP1086D2T-33R4G implements a composite PNP-NPN pass transistor architecture optimized for low dropout and fast loop response. Its internal bandgap reference and error amplifier maintain regulation across input differentials from 2.0 V to 3.7 V, with ripple rejection of 80 dB at 120 Hz under 1.5 A load.
Thermal shutdown is 100% functionally tested with 25°C hysteresis, and current limit is active above 1.6 A at junction temperatures ≥25°C. The device requires no external compensation but mandates a minimum 22 µF tantalum output capacitor for stability and optimal transient performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±1.5% (ensures reliable core logic supply for 3.3 V microprocessors) |
| Max Output Current | 1.5 A continuous (supports mid-power embedded processors and FPGAs) |
| Dropout Voltage | 1.05 V typical @ 1.5 A (enables operation with ≤4.35 V input for 3.3 V output) |
| Line Regulation | 0.02% typical (minimizes output drift during input rail variation) |
| Load Regulation | 0.04% typical (maintains tight voltage under dynamic load steps) |
| Ripple Rejection | 80 dB @ 120 Hz, 1.5 A (suppresses switching noise from upstream DC/DC converters) |
| Thermal Shutdown | 150–210°C activation range with 25°C hysteresis (prevents latch-up during sustained overload) |
Pinout & Package
D2PAK-3 package (Case 418AB), thermally enhanced surface-mount outline with exposed thermal pad; tab connected to VOUT for direct heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal circuitry and feedback path; must be low-impedance connection to minimize load regulation error |
| 2 | VOUT | Regulated 3.3 V output; also electrically tied to metal tab for thermal conduction and PCB heatsinking |
| 3 | VIN | Input supply pin; accepts up to 7.0 V differential relative to VOUT; requires ≥10 µF input capacitance |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Architecture | 1.05 V typical at 1.5 A enables efficient 3.3 V regulation from 5 V rails without excessive power loss |
| Fast Transient Response | Sub-10 µs recovery from 750 mA → 1500 mA load step minimizes undershoot in processor supply domains |
| Integrated Protection | Current limit (1.6–3.1 A) and thermal shutdown (150–210°C) prevent destruction during fault conditions |
| Pb-Free Packaging | D2PAK-3 with Pb-free finish (G suffix) complies with RoHS and JEDEC J-STD-020 reflow profiles |
| Stability Without External Compensation | Guaranteed stable with ≥22 µF tantalum output capacitor; avoids ceramic ESR-related oscillation risks |
Applications
| Microprocessor Core Supply | FPGA I/O Bank Regulator |
|---|---|
Use Scenario: Powers ARM Cortex-M7 or RISC-V SoC core logic requiring clean, tightly regulated 3.3 V at up to 1.5 A peak current. IC Role / Device Role / Timing Role: Primary post-regulator following a buck converter; provides final voltage stabilization and noise filtering. Use Value: 1.05 V dropout allows use with 5 V intermediate bus while maintaining >93% efficiency at full load; 80 dB ripple rejection suppresses switching artifacts from upstream DC/DC. | Use Scenario: Supplies configurable I/O banks on Xilinx Artix-7 or Intel Cyclone V FPGA where voltage tolerance must stay within ±1.5%. IC Role / Device Role / Timing Role: Fixed-output LDO delivering precise 3.3 V to parallel I/O structures with simultaneous switching noise immunity. Use Value: ±1.5% output accuracy and 0.04% load regulation ensure signal integrity across all I/O standards (LVCMOS, SSTL); fast transient response prevents timing violations during bank switching. |
| Industrial PLC Digital I/O Module | Medical Diagnostic Sensor Interface |
Use Scenario: Provides isolated 3.3 V power to digital input/output circuits in programmable logic controllers operating in harsh 0–70°C ambient environments. IC Role / Device Role / Timing Role: Local point-of-load regulator for optocoupler drivers and level-shifting logic in DIN-rail mounted modules. Use Value: Thermal shutdown with 25°C hysteresis ensures safe recovery after overtemperature events; 1.5 A rating supports multiple parallel outputs without derating. | Use Scenario: Powers analog front-end sensors (e.g., precision ADCs, op-amps) in portable ultrasound or ECG devices requiring ultra-low noise and high reliability. IC Role / Device Role / Timing Role: Low-noise, fixed-output LDO supplying bias voltage to signal conditioning circuitry adjacent to sensitive analog paths. Use Value: 80 dB ripple rejection at 120 Hz eliminates interference from AC-DC adapter harmonics; ±1.5% accuracy maintains calibration integrity across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1086CT-3.3#PBF | Pin-compatible but higher 1.3 V typical dropout at 1.5 A; 1.5% output tolerance same; thermal shutdown at 165°C (no hysteresis specified) | Same TO-220/D2PAK footprint; less efficient at low VIN−VOUT differentials | Select when legacy LT1086 design reuse is required and 0.25 V higher dropout is acceptable |
| TSP50033DR | 3.3 V fixed, 1.5 A, but 1.2 V typical dropout; no thermal hysteresis; requires 10 µF ceramic + 1 µF ceramic output cap | Smaller SOT-223 package; not pin-compatible; faster transient but lower PSRR (65 dB @ 120 Hz) | Select for space-constrained designs where thermal hysteresis is non-critical and board area is premium |
Compared with LT1086CT-3.3#PBF and TSP50033DR, the NCP1086D2T-33R4G delivers superior dropout performance (1.05 V vs. 1.3 V/1.2 V), guaranteed thermal hysteresis (25°C), and higher ripple rejection (80 dB), making it optimal for thermally demanding, noise-sensitive 3.3 V microprocessor and FPGA applications where stability and efficiency are prioritized over footprint size.
Availability
NCP1086D2T-33R4G is available at Aetrix Electronics and suitable for microprocessor core supplies, FPGA I/O regulation, industrial PLC digital I/O modules, and medical sensor interfaces requiring stable component supply across extended production lifecycles.
Supply support for NCP1086D2T-33R4G 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, cloud, and medical markets.
The NCP1086 series was designed specifically for high-current, low-dropout post-regulation in microprocessor and FPGA power systems, emphasizing thermal robustness, transient performance, and compatibility with standard tantalum output capacitors.
FAQ
What is the maximum input voltage differential for NCP1086D2T-33R4G?
The NCP1086D2T-33R4G has an absolute maximum VIN−VOUT differential of 7.0 V. Exceeding this risks permanent damage, even if the absolute VIN remains within safe limits. This specification governs safe operation during startup, line transients, and short-circuit conditions - not steady-state regulation. The device is rated for continuous operation with VIN−VOUT between 2.0 V and 3.7 V per its fixed-output electrical characteristics table.
Does NCP1086D2T-33R4G require an external capacitor for stability?
Yes, the NCP1086D2T-33R4G requires a minimum 22 µF tantalum output capacitor for guaranteed stability and optimal transient response. Ceramic capacitors alone are not recommended due to near-zero ESR, which can cause oscillation. The datasheet specifies that aluminum electrolytic or tantalum types provide appropriate ESR for loop compensation; using 22 µF tantalum meets all stability, startup, and load-step requirements for the NCP1086D2T-33R4G across its full operating range.
What is the thermal resistance junction-to-case (RJC) for NCP1086D2T-33R4G?
The thermal resistance junction-to-case (RJC) for NCP1086D2T-33R4G is 3.5°C/W, as specified in the Package Thermal Data table for the D2PAK-3 package. This value is critical for heatsink sizing calculations and reflects the intrinsic thermal path from the silicon die to the exposed metal tab (VOUT). When designing thermal management, RJC must be combined with case-to-heatsink (RCS) and heatsink-to-ambient (RSA) resistances to determine total RJA and ensure TJ remains ≤150°C under worst-case power dissipation.
Is NCP1086D2T-33R4G pin-compatible with other regulators in the NCP1086 family?
Yes, the NCP1086D2T-33R4G shares identical pinout (GND/VOUT/VIN) and package (D2PAK-3) with all other D2PAK variants in the NCP1086 family, including adjustable versions like NCP1086D2T-ADJR4G. However, it is not pin-compatible with SOT-223 or TO-220 variants due to differing pin assignments and physical outlines. Pin compatibility is strictly limited to same-package-type members of the NCP1086 series.
What protection features does NCP1086D2T-33R4G include?
The NCP1086D2T-33R4G integrates two primary protection features: current limiting (1.6–3.1 A activation range) and thermal shutdown (150–210°C trip range with 25°C hysteresis). Both are 100% functionally tested in production. Current limit responds to overloads before thermal stress accumulates, while thermal shutdown provides fail-safe cutoff during sustained overheating. Neither feature requires external components - they are fully self-contained within the NCP1086D2T-33R4G die.
NCP1086D2T-33R4G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.4V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 80dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-3
NCP1086D2T-33R4G FAQ
1.How can I place an order for NCP1086D2T-33R4G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1086D2T-33R4G 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 NCP1086D2T-33R4G reliable?
The price and inventory of NCP1086D2T-33R4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1086D2T-33R4G is usually 5 days.
3.What payment methods are accepted for NCP1086D2T-33R4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1086D2T-33R4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1086D2T-33R4G?
NCP1086D2T-33R4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1086D2T-33R4G 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 NCP1086D2T-33R4G?
For technical support, including NCP1086D2T-33R4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1086D2T-33R4G requirements.
6.How does Aetrix verify that NCP1086D2T-33R4G is sourced from the original manufacturer or authorized distributors?
All NCP1086D2T-33R4G 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 NCP1086D2T-33R4G meets industry standards.
7.What is the process for return or replacement of NCP1086D2T-33R4G?
All NCP1086D2T-33R4G units undergo pre-shipment inspection (PSI). If there is an issue with NCP1086D2T-33R4G, 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 NCP1086D2T-33R4G part is unused and in its original packaging.
Return procedure for NCP1086D2T-33R4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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