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LT3081ER#PBF
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Analog Devices Linear Voltage Regulators (LDO), TO-263-7. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownLT3081ER#PBF
Analog Devices · Linear Voltage Regulators (LDO) · TO-263-7
LT3081ER#PBF from Analog Devices, in a TO-263-7. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | ILIM | passive | A resistor between this pin and OUT programs the output current limit, typically 360mA/kΩ with a 450Ω offset, and the device keeps an internal current limit if the pin is left open. |
| 2 | SET | input | This is the error amplifier's noninverting input, with a fixed 50µA current source flowing out of it, and a single external resistor sets VOUT over the range 0V to 34.5V. |
| 3 | IMON | output | This pin sources a current typically equal to ILOAD/5000 (200µA per amp) and its output is valid from VOUT + 0.4V to VOUT - 40V; connect it to OUT if unused. |
| 4 | OUT | power_out | This is the power output of the device, which requires a 5mA minimum load current for proper regulation; the tab is internally tied to this pin and must be tied directly to OUT at the PCB. |
| 5 | TEMP | output | This pin delivers a current of 1µA/°C for temperatures above 5°C (typically 25µA at 25°C), valid for voltages from VOUT + 0.4V to VOUT - 40V; connect it to OUT if unused. |
| 6 | IN | power_in | This pin supplies power to the regulator, and its voltage must be between the dropout voltage and 36V above the OUT pin, depending on output load current. |
| 7 | NC | unconnected | No connect pin with no connection to internal circuitry; it may be tied to IN, OUT, GND or left floating. |
| 8 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | TO-263-7 |
| Category | Power Management ICs |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| SET Pin Current | ISET | 49.5 | 50 | 50.5 | µA | VIN = 2V, ILOAD = 5mA | 3 |
| SET Pin Current over load and line | ISET | 48.75 | 50 | 51.25 | µA | 2V ≤ VIN ≤ 36V, 5mA ≤ ILOAD ≤ 1.5A, full operating temperature range | 3 |
| Offset Voltage | VOS | -1.5 | 0 | 1.5 | mV | VIN = 2V, ILOAD = 5mA | 3 |
| Offset Voltage over temperature | VOS | -3.5 | 0 | 3.5 | mV | VIN = 2V, ILOAD = 5mA, full operating temperature range | 3 |
| VOS Load Regulation (R, T7 Packages) | VOS | -1.5 | -4 | mV | ΔILOAD = 5mA to 1.5A, full operating temperature range | 3 | |
| Minimum Load Current | 1.1 | 5 | mA | 2V ≤ VIN ≤ 36V, full operating temperature range | 3 | ||
| Dropout Voltage | 1.23 | 1.5 | V | ILOAD = 1.5A, full operating temperature range | 3 | ||
| Internal Current Limit | 1.5 | 2 | A | VIN = 5V, VSET = 0V, VOUT = -0.1V, full operating temperature range | 3 | ||
| ILIM Programming Ratio | 300 | 360 | 500 | mA/kΩ | full operating temperature range | 3 | |
| IMON Full-Scale Output Current | 290 | 300 | 330 | µA | ILOAD = 1.5A | 3 | |
| TEMP Output Current Absolute Error | -10 | 10 | µA | 0°C < TJ ≤ 125°C | 4 | ||
| Ripple Rejection | 75 | 90 | dB | VRIPPLE = 0.5VP-P, ILOAD = 0.1A, CSET = 0.1µF, COUT = 10µF, VIN = VOUT(NOMINAL) + 3V, f = 120Hz | 4 | ||
| IN Pin to OUT Pin Differential Voltage | VIN-VOUT | -40 | 40 | V | 2 | ||
| SET Pin Current | ISET | -25 | 25 | mA | Note 6 | 2 | |
| SET Pin Voltage relative to OUT | VSET-VOUT | -10 | 10 | V | Note 6 | 2 | |
| TEMP Pin Voltage relative to OUT | VTEMP | -40 | 1 | V | 2 | ||
| ILIM Pin Voltage relative to OUT | VILIM | -0.2 | 0.2 | V | 2 | ||
| IMON Pin Voltage relative to OUT | VIMON | -40 | 1 | V | 2 | ||
| Lead Temperature (Soldering) | 300 | °C | 10 sec, FE, R, T7 packages only | 2 | |||
| Operating Junction Temperature Range (E-Grade) | TJ | -40 | 125 | °C | E-grade | 2 | |
| Storage Temperature Range | TSTG | -65 | 150 | °C | 2 | ||
| Maximum Junction Temperature (R package) | TJMAX | 125 | °C | R package (DD-Pak) | 2 | ||
| Thermal Resistance Junction-to-Ambient (R package) | θJA | 15 | °C/W | R package (DD-Pak) | 2 | ||
| Thermal Resistance Junction-to-Case (R package) | θJC | 3 | °C/W | R package (DD-Pak) | 2 | ||
| Output Voltage Range | VOUT | 0 | 34.5 | V | programmed by single SET resistor | 10 | |
| Input Voltage Range | VIN | 1.2 | 36 | V | 1 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | 1-4/Pins 1-5, 8, 9, 16/Pin 4/Pin 4) at the PCB. The amount of copper area and planes connected to OUT determine | 10 |
CAD (KiCad official)
- Symbol:
LT3081ER#PBF - Footprint:
Package_TO_SOT_SMD:TO-263-7_TabPin8 - 3D model: TO-263-7 (KiCad packages3D, STEP)
- 3D model files:
lt3081er-pbf-etched.step/lt3081er-pbf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lt3081er-pbf.step/lt3081er-pbf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (32 pp, sha256
db8bd595a2b6fd11, retrieved 2026-11-02, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).