component
LR8321A-M25
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.
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LR8321A-M25
LR · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3
LR8321A-M25 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 pin; the datasheet states that all voltage values are referenced to GND unless otherwise noted. |
| 2 | VIN | power_in | Input voltage pin with a 24 V maximum input voltage in the electrical characteristics (32 V absolute maximum), and a bypass capacitor of at least 1 µF ceramic is recommended at this pin. |
| 3 | VOUT | power_out | Fixed regulated output pin, which for the -M25 variant is 2.5 V; output current is 100 mA in the test conditions with 150 mA absolute maximum, and an output capacitor of at least 1 µF ceramic is recommended. |
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 |
|---|---|---|---|---|---|---|---|
| Maximum input supply voltage | VIN | 32 | V | 常温下测试(除非特殊说明) | 4 | ||
| Maximum output current | IOUT | 150 | mA | 常温下测试(除非特殊说明) | 4 | ||
| Power dissipation | PD | 500 | mW | SOT89-3 package | 4 | ||
| Operating temperature | TOPR | -40 | 105 | ℃ | 4 | ||
| Storage temperature | TSTG | -40 | 125 | ℃ | 4 | ||
| ESD human body model | HBM | 3000 | V | H.B.M POS/NEG | 4 | ||
| Maximum junction temperature (absolute rating) | TJ(MAX) | 150 | °C | 8 | |||
| Maximum junction temperature (recommended, normal operation) | TJ | 125 | °C | Recommended for normal operation | 8 | ||
| Input voltage | VIN | 24 | V | ISS=5uA | 4 | ||
| Output voltage accuracy (±2% of VOUT) | VOUT | -2 | 2 | % | VIN=VOUT+2V, IOUT=10mA | 4 | |
| Line regulation | △VOUT | -30 | 30 | mV | VOUT+2V≤VIN≤24V, IOUT=5mA | 4 | |
| Load regulation | △VOUT | -50 | 50 | mV | VIN= VOUT+2V, 1mA≤IOUT≤100mA | 4 | |
| Dropout voltage | VDrop | 320 | 390 | 450 | mV | IOUT=50mA, △VOUT=±2%*VOUT | 4 |
| Dropout voltage | VDrop | 600 | 750 | 900 | mV | IOUT=100mA, △VOUT=±2%*VOUT | 4 |
| Output voltage temperature coefficient | △VOUT/(△Ta*VOUT) | -100 | 50 | 100 | ppm/℃ | VIN= VOUT+2V, IOUT=10mA, -40℃≤Ta≤85℃ | 5 |
| Quiescent current | ISS | 1.5 | 5 | uA | VIN= VOUT+2V | 5 | |
| Input capacitor CIN (recommended) | CIN | 1 | 10 | uF | Layout recommendation, CIN=COUT, ceramic input capacitor | 10 | |
| Output capacitor COUT (recommended) | COUT | 1 | 10 | uF | Layout recommendation, CIN=COUT | 10 | |
| Output current | IOUT | 100 | mA | VIN= VOUT+2V | 4 | ||
| PSRR | PSRR | 75 | dB | VIN= VOUT+2V, IOUT=10mA, f=100Hz | 5 | ||
| PSRR | PSRR | 55 | dB | VIN= VOUT+2V, IOUT=10mA, f=1kHz | 5 | ||
| PSRR | PSRR | 40 | dB | VIN= VOUT+2V, IOUT=10mA, f=10kHz | 5 | ||
| Short-circuit current | ISCP | 20 | mA | VOUT=GND | 5 | ||
| Overcurrent protection limit | IOCP | 120 | mA | 5 | |||
| Junction-to-ambient thermal resistance | θJA | 200 | °C/W | SOT89-3 package | 8 | ||
| Input series resistor (recommended, approx.) | R | 10 | Ω | Recommended in series at LDO input to absorb input spikes (approx.) | 10 |
CAD (KiCad official)
- Symbol:
LR8321A-M25 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files:
lr8321a-m25-etched.step/lr8321a-m25-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lr8321a-m25.step/lr8321a-m25.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LR datasheet (12 pp, sha256
75e1ff006d959d36, retrieved 2026-10-17, 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).
# LR8321A-M25
**LR** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3
LR8321A-M25 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 pin; the datasheet states that all voltage values are referenced to GND unless otherwise noted. |
| 2 | VIN | power_in | Input voltage pin with a 24 V maximum input voltage in the electrical characteristics (32 V absolute maximum), and a bypass capacitor of at least 1 µF ceramic is recommended at this pin. |
| 3 | VOUT | power_out | Fixed regulated output pin, which for the -M25 variant is 2.5 V; output current is 100 mA in the test conditions with 150 mA absolute maximum, and an output capacitor of at least 1 µF ceramic is recommended. |
## 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 |
|---|---|---|---|---|---|---|---|
| Maximum input supply voltage | VIN | | | 32 | V | 常温下测试(除非特殊说明) | 4 |
| Maximum output current | IOUT | | | 150 | mA | 常温下测试(除非特殊说明) | 4 |
| Power dissipation | PD | | | 500 | mW | SOT89-3 package | 4 |
| Operating temperature | TOPR | -40 | | 105 | ℃ | | 4 |
| Storage temperature | TSTG | -40 | | 125 | ℃ | | 4 |
| ESD human body model | HBM | | | 3000 | V | H.B.M POS/NEG | 4 |
| Maximum junction temperature (absolute rating) | TJ(MAX) | | | 150 | °C | | 8 |
| Maximum junction temperature (recommended, normal operation) | TJ | | | 125 | °C | Recommended for normal operation | 8 |
| Input voltage | VIN | | | 24 | V | ISS=5uA | 4 |
| Output voltage accuracy (±2% of VOUT) | VOUT | -2 | | 2 | % | VIN=VOUT+2V, IOUT=10mA | 4 |
| Line regulation | △VOUT | -30 | | 30 | mV | VOUT+2V≤VIN≤24V, IOUT=5mA | 4 |
| Load regulation | △VOUT | -50 | | 50 | mV | VIN= VOUT+2V, 1mA≤IOUT≤100mA | 4 |
| Dropout voltage | VDrop | 320 | 390 | 450 | mV | IOUT=50mA, △VOUT=±2%*VOUT | 4 |
| Dropout voltage | VDrop | 600 | 750 | 900 | mV | IOUT=100mA, △VOUT=±2%*VOUT | 4 |
| Output voltage temperature coefficient | △VOUT/(△Ta*VOUT) | -100 | 50 | 100 | ppm/℃ | VIN= VOUT+2V, IOUT=10mA, -40℃≤Ta≤85℃ | 5 |
| Quiescent current | ISS | | 1.5 | 5 | uA | VIN= VOUT+2V | 5 |
| Input capacitor CIN (recommended) | CIN | 1 | | 10 | uF | Layout recommendation, CIN=COUT, ceramic input capacitor | 10 |
| Output capacitor COUT (recommended) | COUT | 1 | | 10 | uF | Layout recommendation, CIN=COUT | 10 |
| Output current | IOUT | | 100 | | mA | VIN= VOUT+2V | 4 |
| PSRR | PSRR | | 75 | | dB | VIN= VOUT+2V, IOUT=10mA, f=100Hz | 5 |
| PSRR | PSRR | | 55 | | dB | VIN= VOUT+2V, IOUT=10mA, f=1kHz | 5 |
| PSRR | PSRR | | 40 | | dB | VIN= VOUT+2V, IOUT=10mA, f=10kHz | 5 |
| Short-circuit current | ISCP | | 20 | | mA | VOUT=GND | 5 |
| Overcurrent protection limit | IOCP | | 120 | | mA | | 5 |
| Junction-to-ambient thermal resistance | θJA | | 200 | | °C/W | SOT89-3 package | 8 |
| Input series resistor (recommended, approx.) | R | | 10 | | Ω | Recommended in series at LDO input to absorb input spikes (approx.) | 10 |
## CAD (KiCad official)
- Symbol: `LR8321A-M25`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files: `lr8321a-m25-etched.step` / `lr8321a-m25-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lr8321a-m25.step` / `lr8321a-m25.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [LR datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756847209474473984) (12 pp, sha256 `75e1ff006d959d36`, retrieved 2026-10-17, 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`, primary `claude-haiku-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/lr8321a-m25-datasheet.pdf)