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onsemi NCP1086D2TADJR4G
- Part No.:
- NCP1086D2TADJR4G
- Manufacturer:
- onsemi
- Package:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Datasheet:
-
NCP1086D2TADJR4G.pdf
- Description:
- IC REG LIN POS ADJ 1.5A D2PAK-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,523
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Product details
Overview
NCP1086D2TADJR4G from onsemi is a 1.5 A adjustable-output linear regulator in D2PAK-3 package, delivering output voltage from 1.25 V to 5.5 V with ±1% output accuracy over temperature, 1.05 V typical dropout at full load, and fast transient response - designed for post-regulation and microprocessor supply applications requiring stable low-voltage operation.
For engineers reviewing the NCP1086D2TADJR4G datasheet, pinout, applications, or equivalent options, key selection considerations include dropout voltage under 1.4 V at 1.5 A, thermal shutdown at 150–210°C, current limit of 1.6–3.1 A, ±1% reference voltage tolerance, and compatibility with tantalum output capacitors for stability.
Technical Context
The NCP1086D2TADJR4G implements a composite PNP-NPN pass transistor architecture enabling low dropout and high current capability. Its internal bandgap reference (1.254 V typical) and error amplifier maintain regulation by sensing voltage between VOUT and ADJ pins, while current-limit and thermal shutdown circuits provide fault protection.
It operates with input-to-output differential up to 7.0 V absolute maximum, requires external resistor divider for output setting, and relies on ≥22 µF tantalum output capacitance for loop stability and transient response - not compatible with low-ESR ceramic-only networks without additional compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.5 A continuous - supports microprocessor core rails and FPGA I/O banks requiring stable high-current DC supply. |
| Dropout Voltage | 1.05 V typical @ 1.5 A - enables operation with minimal VIN–VOUT margin, critical for low-voltage systems like 3.3 V or 2.5 V inputs. |
| Reference Voltage | 1.254 V ±1% - sets precision of adjustable output via R1/R2 divider; determines absolute output accuracy across temperature. |
| Line Regulation | 0.02% typical - ensures output stability against input voltage variation (e.g., upstream DC/DC ripple or line sag). |
| Load Regulation | 0.04% typical - maintains tight output voltage during dynamic load steps common in digital ICs. |
| Ripple Rejection | 80 dB @ 120 Hz - suppresses low-frequency switching noise from upstream converters, improving power integrity. |
| Thermal Shutdown | 150–210°C activation range - protects device during overload or poor heatsinking; includes 25°C hysteresis for reliable recovery. |
Pinout & Package
D2PAK-3 package (Case 418AB), thermally enhanced surface-mount outline with exposed thermal pad; tab connected to VOUT for direct heatsink mounting. Requires thermal compound and mechanical isolation if heatsink is grounded.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Adj) | Adjust reference node | Low-side connection to internal 1.25 V bandgap reference; sets output via external R1/R2 divider; 50 µA typical bias current affects precision. |
| 2 (VOUT) | Regulated output | Power output terminal and thermal tab connection; must be Kelvin-connected near load for best regulation under PCB trace resistance. |
| 3 (VIN) | Input supply | Unregulated input; must stay within 7.0 V max differential vs. VOUT to avoid damage; requires ≥10 µF input capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Fast transient response | Sub-10 µs recovery from 750 mA load step - minimizes voltage droop during CPU burst activity. |
| Low dropout voltage | 1.05 V typical @ 1.5 A - reduces power loss and heat generation compared to legacy regulators like LT1086. |
| ±1% output accuracy | Over full operating temperature range (−40°C to +70°C) - eliminates need for post-production trimming in industrial designs. |
| Integrated protection | Current limit (1.6–3.1 A) and thermal shutdown (150–210°C) - prevents catastrophic failure during short-circuit or overheating events. |
| Pb-free packaging | D2PAK-3 with G suffix - compliant with RoHS and JEDEC J-STD-020 reflow profiles (230°C peak). |
Applications
| Microprocessor Core Supply | FPGA I/O Bank Regulation |
|---|---|
Use Scenario: Powering ARM Cortex-A series SoCs with dynamic current draw from 10 mA to 1.5 A during active states. IC Role / Device Role / Timing Role: Post-regulator providing clean, low-noise 1.2 V or 1.8 V supply derived from intermediate 3.3 V or 5 V rail. Use Value: 1.05 V dropout enables efficient conversion from 3.3 V input to 1.8 V output (1.5 V headroom), reducing power dissipation by >30% vs. higher-dropout alternatives. | Use Scenario: Regulating 2.5 V or 3.3 V I/O voltage for Xilinx Artix-7 FPGAs with simultaneous switching noise sensitivity. IC Role / Device Role / Timing Role: Local point-of-load regulator placed adjacent to FPGA BGA package for minimal trace inductance. Use Value: 80 dB ripple rejection attenuates 120 Hz ripple from upstream AC/DC supplies, preventing timing jitter in high-speed I/O interfaces. |
| Industrial PLC Power Module | Test Equipment Reference Supply |
Use Scenario: Providing stable 5.0 V auxiliary supply in programmable logic controllers operating from 12–24 V DC bus. IC Role / Device Role / Timing Role: Secondary linear regulator after wide-input DC/DC converter, ensuring EMI-clean output for analog sensor interfaces. Use Value: ±1% output accuracy over −40°C to +70°C eliminates calibration drift in field-deployed units without temperature compensation circuitry. | Use Scenario: Generating ultra-stable 2.500 V reference for 16-bit DACs in automated test equipment. IC Role / Device Role / Timing Role: Precision adjustable regulator configured with 0.1% metal-film resistors to set exact reference voltage. Use Value: 0.04% load regulation ensures <10 µV output shift across full 10 mA–1.5 A load range, meeting metrology-grade stability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1086CT-3.3#PBF | Fixed 3.3 V output; 1.5 A rating; 1.3 V typical dropout; TO-220 package only | Lacks adjustable version; no D2PAK option; higher dropout limits efficiency in low-headroom designs | Select when fixed 3.3 V output suffices and through-hole assembly is preferred. |
| TLV1117-33CDCYR | 3.3 V fixed; 800 mA max; SOT-223 only; 1.2 V dropout; lower quiescent current (5 mA) | Lower current capacity; unsuitable for >1 A loads; smaller footprint but no thermal pad | Choose for space-constrained, lower-power applications where 1.5 A capability is unnecessary. |
Compared with LT1086CT-3.3#PBF and TLV1117-33CDCYR, the NCP1086D2TADJR4G offers higher current (1.5 A), lower dropout (1.05 V), D2PAK thermal performance, and adjustable output flexibility - making it optimal for high-efficiency, high-reliability post-regulation where thermal management and precision are critical.
Availability
NCP1086D2TADJR4G is available at Aetrix Electronics and suitable for microprocessor core supplies, FPGA I/O regulation, industrial PLC power modules, and test equipment reference supplies requiring stable component supply with Pb-free compliance and D2PAK thermal performance.
Supply support for NCP1086D2TADJR4G 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, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The NCP1086D2TADJR4G belongs to onsemi's high-current linear regulator product line, engineered for post-regulation and microprocessor supply applications demanding low dropout, fast transient response, and robust thermal protection in compact surface-mount packages.
FAQ
What is the maximum input-to-output voltage differential allowed for the NCP1086D2TADJR4G?
The NCP1086D2TADJR4G has an absolute maximum VIN–VOUT differential of 7.0 V. Exceeding this risks permanent damage, even if junction temperature remains within limits. This constraint applies regardless of output voltage setting or load condition, and must be enforced in all operating modes including startup and fault conditions.
Does the NCP1086D2TADJR4G require an external capacitor on the ADJ pin for stability?
No, the NCP1086D2TADJR4G does not require an external capacitor on the ADJ pin. Stability is ensured solely by the output capacitor (≥22 µF tantalum recommended); adding capacitance to the ADJ pin is unnecessary and may degrade transient response or cause oscillation per the datasheet's Stability Considerations section.
Can the NCP1086D2TADJR4G be used with ceramic output capacitors?
The NCP1086D2TADJR4G is not optimized for ceramic output capacitors alone due to their near-zero ESR, which can cause instability. The datasheet specifies ≥22 µF tantalum or aluminum electrolytic capacitors. If ceramic capacitors are used, they must be paralleled with ≥10 mΩ ESR (e.g., via series resistor or hybrid network) to meet stability requirements.
What is the minimum load current required for regulation in the NCP1086D2TADJR4G?
The NCP1086D2TADJR4G requires a minimum load current of 0.6–2.0 mA to maintain regulation, depending on input-output differential. This current is typically supplied by the R1/R2 feedback divider; R1 must be selected so that divider current exceeds this minimum, especially at highest VIN–VOUT conditions.
Is the thermal pad of the NCP1086D2TADJR4G electrically connected to any internal node?
Yes, the thermal pad of the NCP1086D2TADJR4G is internally connected to the VOUT pin. Any heatsink or PCB copper area attached to the pad must be electrically isolated if VOUT is not at ground potential, and thermal compound must be non-conductive to prevent short circuits.
NCP1086D2TADJR4G 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:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 1.4V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- -
- 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
NCP1086D2TADJR4G FAQ
1.How can I place an order for NCP1086D2TADJR4G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1086D2TADJR4G 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 NCP1086D2TADJR4G reliable?
The price and inventory of NCP1086D2TADJR4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1086D2TADJR4G is usually 5 days.
3.What payment methods are accepted for NCP1086D2TADJR4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1086D2TADJR4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1086D2TADJR4G?
NCP1086D2TADJR4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1086D2TADJR4G 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 NCP1086D2TADJR4G?
For technical support, including NCP1086D2TADJR4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1086D2TADJR4G requirements.
6.How does Aetrix verify that NCP1086D2TADJR4G is sourced from the original manufacturer or authorized distributors?
All NCP1086D2TADJR4G 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 NCP1086D2TADJR4G meets industry standards.
7.What is the process for return or replacement of NCP1086D2TADJR4G?
All NCP1086D2TADJR4G units undergo pre-shipment inspection (PSI). If there is an issue with NCP1086D2TADJR4G, 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 NCP1086D2TADJR4G part is unused and in its original packaging.
Return procedure for NCP1086D2TADJR4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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