component
LR8103B-T33
Public Made by Adomby adom
LR Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Generated by kicad-footprint-generator · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 21d ago |
| viewers | 21d ago |
| lr8103b-t33-etched.glb | 21d ago |
| lr8103b-t33-etched.step | 21d ago |
| lr8103b-t33-hero.glb | 21d ago |
| lr8103b-t33-hero.overlay.json | 21d ago |
| lr8103b-t33.glb | 21d ago |
| lr8103b-t33.kicad_mod | 21d ago |
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| lr8103b-t33.lbr | 21d ago |
| lr8103b-t33.step | 21d ago |
| package.json | 21d ago |
| page.json | 21d ago |
| README.md | 21d ago |
LR8103B-T33
LR · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5L
LR8103B-T33 from LR, in a SOT-23-5L. 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 | VIN | power_in | Input supply pin, rated up to 6.5V in operation (9V absolute maximum), needs a ceramic bypass capacitor of at least 1µF close to the pin. |
| 2 | GND | power_in | Ground reference for all voltages; a large copper ground pour is recommended for noise immunity and heat dissipation. |
| 3 | CE | input | Chip enable input that switches the regulator ON/OFF, with enable voltage 0.7V to 1.2V and shutdown current of ±1µA max when CE=0V. |
| 4 | NC | unconnected | No internal connection. |
| 5 | VOUT | power_out | Fixed 3.3V regulated output (±1%) for the -T33 version, up to 300mA with short-circuit current clamped to 30mA, needs an output capacitor of at least 1µF. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LR |
| Package | SOT-23-5L |
| Category | Power Management (PMIC) |
| Pins | 5 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input voltage (electrical, ISS=1uA) | VIN | 6.5 | V | ISS=1uA | 4 | ||
| Maximum input supply voltage | VIN | 9 | V | 4 | |||
| Maximum output current | IOUT | 450 | mA | 4 | |||
| Power dissipation SOT23-5L | PD | 250 | mW | SOT23-5L | 4 | ||
| Storage temperature | TSTG | -40 | 125 | ℃ | 4 | ||
| Operating temperature | TOPR | -10 | 85 | ℃ | 4 | ||
| ESD human body model | -2000 | 2000 | V | H.B.M POS/NEG | 4 | ||
| Output voltage accuracy | VOUT | -1 | 1 | % | 1 | ||
| Enable voltage | VCE | 0.7 | 1.2 | V | VIN=2.2V，IOUT=1mA | 4 | |
| Line regulation | △VOUT | -30 | 30 | mV | VOUT+1V≤VIN≤6.5V，VIN=VCE ,IOUT=10mA | 4 | |
| Load regulation | △VOUT | -40 | 40 | mV | VIN= VCE= VOUT+1V，1mA≤IOUT≤100mA | 4 | |
| Shutdown current | ISHD | -1 | 1 | uA | VIN=VOUT+1V，VCE=0V | 5 | |
| Quiescent current | ISS | 0.8 | 1 | uA | VIN= VCE= VOUT+1V | 5 | |
| Temperature coefficient of output voltage | △VOUT/(△Ta*VOUT) | -100 | 50 | 100 | ppm/℃ | VIN= VCE=VOUT+1V，IOUT=10mA, -40℃≤Ta≤85℃ | 5 |
| Maximum junction temperature (absolute) | TJ | 150 | °C | 6 | |||
| Recommended maximum junction temperature | TJ | 125 | °C | 6 | |||
| Junction-to-ambient thermal resistance SOT23-5L | θJA | 500 | °C/W | SOT23-5L | 6 |
CAD (KiCad official)
- Symbol:
LR8103B-T33 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5L (KiCad packages3D, STEP)
- 3D model files:
lr8103b-t33-etched.step/lr8103b-t33-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lr8103b-t33.step/lr8103b-t33.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LR datasheet (10 pp, sha256
1164d007f79e861e, retrieved 2026-10-18, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).