component
LR8321A-M44
Public Made by Adomby adom
LR Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. 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
markdownLR8321A-M44
LR · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3
LR8321A-M44 from LR, in a SOT-89-3. 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 | GND | power_in | Ground reference pin; the datasheet states that all voltage values are referenced to GND unless otherwise noted. |
| 2 | VIN | power_in | Input voltage pin, rated at 24 V in the electrical characteristics (32 V maximum input supply in the absolute maximum ratings), and requires a bypass capacitor of at least 1 µF, preferably ceramic, at the input. |
| 3 | VOUT | power_out | Regulated output voltage pin, which for the M44 variant is 4.4 V and can source up to 100 mA, and requires an output capacitor of at least 1 µF for ceramic types. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LR |
| Package | SOT-89-3 |
| Category | Power Management (PMIC) |
| Pins | 3 |
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 (max) | VIN | 24 | V | ISS=5uA | 4 | ||
| Output voltage accuracy | VOUT | -2 | 2 | % | VIN=VOUT+2V, IOUT=10mA; printed as VOUT0.98 to VOUT1.02 | 4 | |
| Output voltage (nominal for LR8321A-M44) | VOUT | 4.4 | V | VIN=VOUT+2V, IOUT=10mA | 1 | ||
| Line regulation | ΔVOUT | -30 | 30 | mV | VOUT+2V≤VIN≤24V, IOUT=5mA | 4 | |
| Load regulation | ΔVOUT | -50 | 50 | mV | VIN=VOUT+2V, 1mA≤IOUT≤100mA | 4 | |
| Dropout voltage at 50 mA | VDrop | 320 | 390 | 450 | mV | IOUT=50mA, ΔVOUT=±2%*VOUT | 4 |
| Dropout voltage at 100 mA | VDrop | 600 | 750 | 900 | mV | IOUT=100mA, ΔVOUT=±2%*VOUT | 4 |
| Quiescent current | ISS | 1.5 | 5 | uA | VIN=VOUT+2V | 5 | |
| Output voltage temperature coefficient | ΔVOUT/(ΔTa*VOUT) | -100 | 50 | 100 | ppm/℃ | VIN=VOUT+2V, IOUT=10mA, -40℃≤Ta≤85℃ | 5 |
| Maximum input supply voltage | VIN | 32 | V | Relative to GND | 4 | ||
| Maximum output current | IOUT | 150 | mA | 4 | |||
| Power dissipation | PD | 500 | mW | SOT89-3 package | 4 | ||
| Operating temperature | TOPR | -40 | 105 | ℃ | 4 | ||
| Storage temperature | TSTG | -40 | 125 | ℃ | 4 | ||
| ESD HBM | -3000 | 3000 | V | H.B.M POS/NEG | 4 | ||
| Maximum junction temperature | TJ | 150 | °C | Absolute maximum operating limit | 8 | ||
| Recommended maximum junction temperature | TJ | 125 | °C | Recommended for normal operation | 8 | ||
| Junction-to-ambient thermal resistance (SOT89-3) | θJA | 200 | °C/W | SOT89-3 package | 8 |
CAD (KiCad official)
- Symbol:
LR8321A-M44 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files:
lr8321a-m44-etched.step/lr8321a-m44-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lr8321a-m44.step/lr8321a-m44.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LR datasheet (12 pp, sha256
75e1ff006d959d36, 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).