LT3081ER#TRPBF Analog Devices Integrated Circuit (Other) In Stock
Analog Devices LT3081ER#TRPBF is a rugged 1.5A adjustable LDO linear regulator with single-resistor output programming and 1.23V dropout in a 7-pin MSOP-like package. It supports parallel operation for high-current applications and withstands reverse current, reverse input voltage, and reverse output voltage for robust industrial and communications power rails.
- Manufacturer
- Analog Devices
- Package
- Other
- Pin Count
- 7
- Lifecycle
- ACTIVE
- Datasheet
- LT3081ER#TRPBF Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Single-resistor programmable output voltage eliminates the traditional resistor divider, simplifying design and reducing BOM component count
- 1.5A output current with parallel-operation capability allows multiple devices to share current load, scaling output current without redesign
- Rugged protection against reverse input voltage, reverse output voltage, and reverse current enables reliable operation in complex power sequencing scenarios
Applications
The LT3081ER#TRPBF is designed for telecommunications equipment, industrial power supplies, and high-reliability embedded systems requiring a robust, adjustable 1.5A linear regulator. Its parallel-operation capability makes it suitable for high-current point-of-load rails in server blades, FPGA power supplies, and distributed power architectures where multiple regulators share load. The rugged input and output protection features also make it ideal for automotive and aerospace auxiliary power circuits operating across -40°C to +125°C temperature ranges.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1462 |
| YTEOL | 10 |
| Adjustability | ADJUSTABLE |
| Dropout Voltage1-Nom | 1.23V |
| JESD-30 Code | R-PSSO-G7 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 1.5A |
| Output Voltage1-Max | 34.5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SMSIP7H,.55,50TB |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Regulator Type | ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | Matte Tin (Sn) - with Nickel (Ni) barrier |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the single-resistor programming of LT3081ER#TRPBF simplify power supply design?
The LT3081ER#TRPBF uses a current-source reference rather than a voltage reference, allowing output voltage to be set with a single resistor from the SET pin to GND (V_OUT = 50µA × R_SET). This eliminates the two-resistor divider required by traditional LDOs, halving the resistor count and removing the sensitivity to resistor ratio matching.
When should multiple LT3081ER#TRPBF devices be paralleled instead of using a single higher-current regulator?
Paralleling 2 or more LT3081 devices distributes thermal dissipation across multiple packages, reducing junction temperature by up to 50% compared to a single 3A device. This is beneficial when the input-to-output voltage difference exceeds 3V at 3A load, as paralleled devices reduce per-package power dissipation below the 7-pin MSOP thermal limit of 125°C junction temperature.
What reverse protection features does LT3081ER#TRPBF provide for complex power sequencing?
The LT3081ER#TRPBF tolerates reverse input voltage (output higher than input), reverse output voltage, and reverse current flow, making it inherently safe during power sequencing when loads back-drive the regulator output above the input rail—a common condition in multi-rail FPGA power-up sequences and battery-backed systems.
Which industrial temperature range does LT3081ER#TRPBF support for harsh environment designs?
The device is rated for operation from -40°C to +125°C junction temperature, covering full industrial and automotive auxiliary temperature ranges. The 1.23V dropout voltage at 1.5A output current means the input supply needs only a 1.23V headroom above the desired output, keeping regulator power dissipation low even at elevated ambient temperatures.
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