component
LR78L05-M
Public Made by Adomby adom
LR Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3L. 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
markdownLR78L05-M
LR · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3L
LR78L05-M from LR, in a SOT-89-3L. 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 | VOUT | power_out | Regulated fixed 5V output (4.9V to 5.1V at VIN=10V, IOUT=10mA) delivering 100mA typical, with an output capacitor of at least 0.1uF required. |
| 2 | GND | power_in | Ground reference for the regulator; all voltages are measured relative to GND. |
| 3 | VIN | power_in | Input supply pin with 30V operating input limit (35V absolute maximum), minimum operating voltage 7V, and an input capacitor of at least 0.33uF recommended. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LR |
| Package | SOT-89-3L |
| 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 |
|---|---|---|---|---|---|---|---|
| 最大输入电源电压 | VIN | 35 | V | 3 | |||
| 最大输出电流 | IOUT | 200 | mA | 3 | |||
| 耗散功率 | PD | 500 | mW | SOT89-3 | 3 | ||
| 工作温度 | TOPR | -40 | 125 | ℃ | 3 | ||
| 存储温度 | TSTG | -65 | 150 | ℃ | 3 | ||
| ESD 人体模式 (H.B.M) | -3000 | 3000 | V | H.B.M POS/NEG | 3 | ||
| 输入电压 | VIN | 30 | V | ISS=2.5mA | 3 | ||
| 输出电压 | VOUT | 4.9 | 5 | 5.1 | V | VIN=10V，IOUT=10mA | 3 |
| 线性调整度 | △VOUT | 18 | 75 | mV | 7V≤VIN≤20V，IOUT=10mA | 3 | |
| 负载调整度 | △VOUT | 20 | 60 | mV | VIN=10V，1mA≤IOUT≤100mA | 3 | |
| 最小压差 (IOUT=50mA) | VDrop | 1.4 | 1.6 | 1.8 | V | IOUT=50mA，△VOUT=±2%*VOUT | 3 |
| 最小压差 (IOUT=100mA) | VDrop | 1.5 | 1.85 | 2.2 | V | IOUT=100mA，△VOUT=±2%*VOUT | 3 |
| 纹波抑制比 | PSRR | 47 | 62 | dB | f=120Hz，8V≤VIN≤16V | 4 | |
| 静态电流 | ISS | 2.5 | 5 | mA | VIN= 10V | 4 | |
| 结温 (极限参数) | TJ | 150 | ℃ | 8 | |||
| 正常工作最大结温 (建议) | TJ | 125 | ℃ | 建议正常工作时 | 8 | ||
| SOT89-3 结到环境热阻 | θJA | 200 | °C/W | SOT89-3 | 8 | ||
| 输入电容 (建议最小值) | CIN | 0.33 | μF | 输入端陶瓷电容 | 8 | ||
| 输出电容 (建议最小值) | COUT | 0.1 | μF | 陶瓷电容 | 8 | ||
| 建议最小负载电容 (注3) | 0.01 | uF | 注3：抑制高频噪声 | 4 |
CAD (KiCad official)
- Symbol:
LR78L05-M - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files:
lr78l05-m-etched.step/lr78l05-m-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lr78l05-m.step/lr78l05-m.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LR datasheet (10 pp, sha256
e6cb82c1689e2541, retrieved 2026-11-05, 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-sonnet-5-5(text+vision), consensusclaude-opus-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).