component
LR8103B-T15
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.
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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README
markdownLR8103B-T15
LR · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5L
LR8103B-T15 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; operating input up to 6.5V (absolute maximum 9V), needs a ceramic bypass capacitor of at least 1µF close to the pin. |
| 2 | GND | power_in | Ground reference for input, output and enable; use a large ground copper area for noise immunity and heat dissipation. |
| 3 | CE | input | Chip enable input that switches the regulator ON/OFF, with enable voltage specified 0.7V to 1.2V; shutdown current is within ±1µA when CE=0V. |
| 4 | NC | unconnected | No internal connection. |
| 5 | VOUT | power_out | Regulated 1.5V output (±1%) for the -T15 version, up to 300mA with short-circuit current limited 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 |
|---|---|---|---|---|---|---|---|
| Enable voltage (high threshold) | VCE | 0.7 | 1.2 | V | VIN=2.2V, IOUT=1mA | 4 | |
| Line regulation | ΔVOUT | -30 | 30 | mV | VOUT+1V≤VIN≤6.5V, VIN=VCE, IOUT=10mA | 4 | |
| Load regulation | ΔVOUT | -40 | 40 | mV | VIN=VCE=VOUT+1V, 1mA≤IOUT≤100mA | 4 | |
| Shutdown current | ISHD | -1 | 1 | uA | VIN=VOUT+1V, VCE=0V | 4 | |
| Quiescent current | ISS | 0.8 | 1 | uA | VIN=VCE=VOUT+1V | 4 | |
| Temperature coefficient of VOUT | ΔVOUT/(ΔTa*VOUT) | -100 | 50 | 100 | ppm/℃ | VIN=VCE=VOUT+1V, IOUT=10mA, -40℃≤Ta≤85℃ | 5 |
| Input voltage (electrical table) | VIN | 6.5 | V | ISS=1uA | 4 | ||
| Maximum input supply voltage (absolute) | VIN | 9 | V | 4 | |||
| Maximum output current (absolute) | IOUT | 450 | mA | 4 | |||
| Power dissipation SOT23-5L | PD | 250 | mW | 4 | |||
| ESD human body model | HBM | -2000 | 2000 | V | POS/NEG | 4 | |
| Operating temperature | TOPR | -10 | 85 | ℃ | 4 | ||
| Storage temperature | TSTG | -40 | 125 | ℃ | 4 | ||
| Input capacitor (recommended) | CIN | 1 | uF | ceramic, input pin, battery-powered high-impedance source | 6 | ||
| Output capacitor (recommended) | COUT | 1 | uF | ceramic | 6 | ||
| Thermal resistance junction-to-ambient SOT23-5L | θJA | 500 | °C/W | 6 | |||
| Maximum junction temperature (absolute) | TJ(MAX) | 150 | °C | 6 | |||
| Recommended maximum junction temperature | TJ | 125 | °C | 6 | |||
| Minimum dropout voltage at 50 mA | VDROP | 150 | mV | VIN=VCE, IOUT=50mA, ΔVOUT=±2%*VOUT | 5 | ||
| Minimum dropout voltage at 100 mA | VDROP | 320 | mV | VIN=VCE, IOUT=100mA, ΔVOUT=±2%*VOUT | 5 | ||
| Ripple rejection at 100 Hz | PSRR | 75 | dB | VIN=VCE=VOUT+1V, IOUT=10mA, f=100Hz | 5 | ||
| Ripple rejection at 1 kHz | PSRR | 55 | dB | VIN=VCE=VOUT+1V, IOUT=10mA, f=1kHz | 5 | ||
| Ripple rejection at 10 kHz | PSRR | 40 | dB | VIN=VCE=VOUT+1V, IOUT=10mA, f=10kHz | 5 | ||
| Short-circuit current | ISCP | 30 | mA | VOUT=GND | 5 | ||
| Output current | IOUT | 300 | mA | VIN=VCE=VOUT+1V | 4 |
CAD (KiCad official)
- Symbol:
LR8103B-T15 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5L (KiCad packages3D, STEP)
- 3D model files:
lr8103b-t15-etched.step/lr8103b-t15-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lr8103b-t15.step/lr8103b-t15.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LR datasheet (10 pp, sha256
10593f286bcf1c34, 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).