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Analog Devices Inc. LT3086IR#TRPBF
- Part No.:
- LT3086IR#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
LT3086IR#TRPBF.pdf
- Description:
- IC REG LIN POS ADJ 2.1A 7DDPAK
- Quantity:
- Payment:
- Shipping:
Inventory:616
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Product details
Overview
LT3086IR#TRPBF from Analog Devices (formerly Linear Technology) is a 40V, 2.1A adjustable low dropout linear regulator with integrated cable drop compensation, output current monitoring (IMON = IOUT/1000), and programmable thermal/current limits. It operates from 1.4V to 40V input, delivers ±2% output voltage accuracy over line/load/temperature, and supports 0.4V–32V output set by a single resistor. Used in high-reliability USB power supplies and post-regulation of switching converters.
For engineers reviewing the LT3086IR#TRPBF datasheet, LT3086IR#TRPBF pinout, LT3086IR#TRPBF application, or LT3086IR#TRPBF equivalent, key selection criteria include guaranteed 330mV dropout at 2.1A, 40µVRMS output noise (10Hz–100kHz), ceramic capacitor stability (≥10µF), reverse-battery/-current/-output protection, and 7-lead DD-Pak thermal performance (θJC = 3°C/W).
Technical Context
The LT3086IR#TRPBF implements a precision bandgap-based reference architecture with Kelvin-sensed SET pin control, enabling accurate output voltage programming independent of load wiring resistance. Its master/slave paralleling capability eliminates external ballast resistors for current sharing.
Cable drop compensation (CDC) uses IMON feedback to inject compensating voltage into the SET node, canceling IR losses across load cables. The TEMP pin provides 10mV/°C analog die temperature output, while ILIM and RPWRGD pins support externally programmable current limit and power-good threshold with hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2.1A maximum continuous; enables high-current point-of-load regulation without derating at full load. |
| Dropout Voltage | 330mV typical at 2.1A; allows operation with minimal VIN–VOUT margin, critical for low-voltage systems. |
| Output Noise | 40µVRMS (10Hz–100kHz); ensures clean power for noise-sensitive analog/RF circuits. |
| Output Accuracy | ±2% over line, load, and temperature; eliminates need for post-production trimming in precision applications. |
| Input Voltage Range | 1.4V to 40V; supports wide-input industrial, automotive, and legacy supply rails. |
| Cable Compensation | Programmable CDC function cancels up to 0.5V IR drop; maintains regulated voltage at remote load terminals. |
| Quiescent Current (Shutdown) | <1µA; enables ultra-low-power standby in battery-backed systems. |
Pinout & Package
LT3086IR#TRPBF is housed in a thermally enhanced 7-lead Plastic DD-Pak package with exposed tab (GND). The package offers θJC = 3°C/W and θJA = 15–19°C/W, optimized for high-power dissipation on PCBs with internal ground planes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TEMP | Die temperature monitor output | Provides 10mV/°C analog voltage; used to set external thermal shutdown threshold via resistor divider. |
| SHDN | Active-low enable input | Pulls regulator into <1µA shutdown when ≤0.85V; logic-compatible with microcontroller GPIO. |
| IN | Main input voltage supply | Accepts 1.4V–40V; includes reverse-battery protection and ±45V absolute max rating. |
| GND | Power and signal reference | Exposed tab must be soldered to PCB ground plane for thermal and electrical integrity. |
| OUT | Regulated output terminal | Kelvin-sensed at package; supports remote sensing for improved load regulation. |
| SET | Reference voltage input | Connects to resistor divider for 0.4V–32V output programming; 400mV reference with ±4mV tolerance. |
| IMON/ILIM | Current monitor & limit input | Combines IMON (IOUT/1000) feedback and ILIM threshold (800mV) for dual-function monitoring and limiting. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable cable drop compensation | Compensates for IR loss in long cables using IMON feedback, maintaining ±2% load regulation without sense lines. |
| Parallel operation without ballast resistors | Master/slave configuration enables scalable current capacity (e.g., 4.2A with two devices) while balancing thermal stress. |
| Integrated diagnostics | Simultaneous IMON (current), TEMP (die temp), and PWRGD (output status) outputs simplify system-level health monitoring. |
| Reverse-protection architecture | Blocks reverse-battery, reverse-current, and reverse-output faults-critical for automotive and hot-swap applications. |
| Stable with ceramic capacitors | Requires only 10µF minimum ceramic output capacitance; eliminates need for costly tantalum or electrolytic capacitors. |
Applications
| USB Power Delivery | Industrial Point-of-Load |
|---|---|
Use Scenario: 5V/2.1A USB-C power supply with 0.24Ω cable resistance between regulator and connector. IC Role / Device Role / Timing Role: Primary LDO regulator with active cable drop compensation to maintain 5.0V ±50mV at plug. Use Value: Eliminates need for remote sense traces or oversized cables; achieves 99.2% voltage regulation accuracy at load. | Use Scenario: 3.3V/2.1A supply for FPGA I/O banks in factory automation controller with 12V intermediate rail. IC Role / Device Role / Timing Role: Post-regulator after buck converter, providing low-noise, high-accuracy voltage with thermal foldback. Use Value: 40µVRMS noise prevents timing jitter in high-speed interfaces; ±2% accuracy avoids I/O voltage margin violations. |
| Automotive Infotainment | Medical Imaging Subsystem |
Use Scenario: 1.8V/2.1A supply for display driver IC in vehicle head unit, subjected to cold-crank (4.5V) and load-dump (40V) transients. IC Role / Device Role / Timing Role: Input-tolerant LDO with reverse-battery protection and shutdown control for safe power sequencing. Use Value: Survives 40V transients without damage; <1µA shutdown current extends battery life during ignition-off state. | Use Scenario: 2.5V/2.1A analog supply for ADC front-end in portable ultrasound device, requiring ultra-low noise and stable regulation. IC Role / Device Role / Timing Role: Low-noise, precision LDO with Kelvin sensing to reject PCB trace impedance effects. Use Value: 40µVRMS noise ensures ≥16-bit ENOB; ±2% accuracy guarantees consistent gain calibration across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3375EFE#TRPBF | Multi-channel (up to 4) 1A buck regulator with integrated LDO; no CDC or IMON functionality. | Suitable for multi-rail systems needing compact integration, not single-rail high-current LDO replacement. | Select when board space is constrained and multiple lower-current rails are required instead of one 2.1A rail. |
| TPS7A8300RGRT | 2A LDO with 25µVRMS noise and 1.1V–3.3V fixed output range; lacks CDC, TEMP, and IMON features. | Better for ultra-low-noise fixed-output applications where programmability and diagnostics are secondary. | Choose when noise is paramount (<25µVRMS) and output voltage is fixed; avoid if cable compensation or thermal monitoring is needed. |
Compared with LTC3375EFE#TRPBF and TPS7A8300RGRT, the LT3086IR#TRPBF uniquely combines 2.1A current, programmable cable compensation, and three-channel analog monitoring (IMON/TEMP/PWRGD) in a single DD-Pak package-making it irreplaceable for high-current, remotely sensed, and fault-diagnosable power rails.
Availability
LT3086IR#TRPBF is available at Aetrix Electronics and suitable for USB power delivery, industrial point-of-load regulation, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LT3086IR#TRPBF 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
Analog Devices acquired Linear Technology in 2017 and continues its legacy of high-performance analog/power ICs with rigorous testing and automotive-grade reliability.
The LT3086 product line was designed for high-current, high-accuracy linear regulation in harsh environments-emphasizing fault resilience, remote sensing, and system-level diagnostics for industrial, medical, and transportation applications.
FAQ
What is the maximum output current and dropout voltage specification for LT3086IR#TRPBF?
The LT3086IR#TRPBF delivers up to 2.1A continuous output current with a typical dropout voltage of 330mV at that load. This value is guaranteed over temperature and line conditions per the datasheet's "Guaranteed Dropout Voltage" curve. The 7-lead DD-Pak package enables this performance through low thermal resistance (θJC = 3°C/W), allowing sustained operation without thermal shutdown under proper PCB layout.
How does cable drop compensation work on LT3086IR#TRPBF, and what external components are required?
Cable drop compensation on the LT3086IR#TRPBF uses the IMON output (IOUT/1000) fed into the CDC pin to inject compensating voltage into the SET node, canceling IR loss in load cables. Required external components are RMON (to set IMON scaling) and RCDC (calculated as RCDC = RMON × RSET × 3000 × RWIRE). For a 0.24Ω cable and RSET = 90.9kΩ, RCDC = 46.4kΩ ensures 5V is maintained at the load despite 240mV drop at 1A.
Can LT3086IR#TRPBF be paralleled with other units, and what design considerations apply?
Yes, LT3086IR#TRPBF supports master/slave paralleling without external ballast resistors. The TRACK pin accepts a master's SET voltage to force slave output tracking. Key considerations include matching RMON values across units, routing TRACK with low inductance, and ensuring thermal symmetry-sharing error is limited to ±10% at 2.1A. The DD-Pak's low θJC helps balance die temperatures during parallel operation.
What protection features does LT3086IR#TRPBF include, and how are they implemented?
LT3086IR#TRPBF integrates reverse-battery protection (blocks –40V on IN), reverse-current protection (limits OUT-to-IN current to 1µA), and reverse-output protection (blocks VOUT > VIN when SHDN = low). Thermal shutdown activates above 125°C (adjustable via TEMP pin), and foldback current limiting responds to overloads or excessive VIN–VOUT differentials-both programmable via external resistors on ILIM and TEMP pins.
Is LT3086IR#TRPBF stable with ceramic output capacitors, and what is the minimum value required?
Yes, LT3086IR#TRPBF is fully stable with ceramic output capacitors, requiring only 10µF minimum (X5R/X7R) for all operating conditions. This eliminates ESR dependency and enables compact, reliable designs without electrolytic or tantalum capacitors. Stability is verified across temperature and load, including transient response with 10µF COUT and 10nF CSET for optimal noise suppression.
LT3086IR#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 0.4V
- Voltage - Output (Max):
- 32V
- Voltage Dropout (Max):
- 0.54V @ 2.1A
- Current - Output:
- 2.1A
- Current - Quiescent (Iq):
- 2.4 mA
- Current - Supply (Max):
- 88 mA
- PSRR:
- 80dB (120Hz)
- Control Features:
- Current Limit, Enable, Power Good, Tracking
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DDPAK-7
LT3086IR#TRPBF FAQ
1.How can I place an order for LT3086IR#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3086IR#TRPBF 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 LT3086IR#TRPBF reliable?
The price and inventory of LT3086IR#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3086IR#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3086IR#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3086IR#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3086IR#TRPBF?
LT3086IR#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3086IR#TRPBF 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 LT3086IR#TRPBF?
For technical support, including LT3086IR#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3086IR#TRPBF requirements.
6.How does Aetrix verify that LT3086IR#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3086IR#TRPBF 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 LT3086IR#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3086IR#TRPBF?
All LT3086IR#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3086IR#TRPBF, 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 LT3086IR#TRPBF part is unused and in its original packaging.
Return procedure for LT3086IR#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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