component
LY5802
Public Made by Adomby adom
Lingyang Micro Power Distribution Switches, SOT-23-6. 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
markdownLY5802
Lingyang Micro · Power Distribution Switches · SOT-23-6
LY5802 from Lingyang Micro, in a SOT-23-6. 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 | AGND | power_in | Analog ground, to be connected to the USB input ground only (not to the protected-side DR ground). |
| 2 | FB | input | Overvoltage-protection setpoint reference; the OVP threshold is set by an external divider (VOVP = 0.54 V × (R1+R2)/R2, with VFB 0.49 V min, 0.54 V typ, 0.59 V max) or by a Zener plus resistor, and the OVP setpoint should be kept below 12 V. |
| 3 | PGND | power_in | Power ground, to be connected to the USB input ground only (not to the protected-side DR ground). |
| 4 | DR | passive | Output negative terminal connected to the ground of the downstream protected circuit, must not be tied to the USB input ground; drain leakage is 1 µA max at DR = 30 V in overvoltage-protection mode. |
| 5 | VIN | power_in | Power input connected to the USB input positive supply and the protected circuit positive supply; absolute maximum input voltage is 30 V (-0.3 V to 30 V). |
| 6 | VIN | power_in | Power input connected to the USB input positive supply and the protected circuit positive supply; absolute maximum input voltage is 30 V (-0.3 V to 30 V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Lingyang Micro |
| Package | SOT-23-6 |
| Category | Power Management (PMIC) |
| Pins | 6 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| 最高输入电压 (maximum input voltage) | -0.3 | 30 | V | 3 | |||
| 储存温度 (storage temperature) | -50 | 150 | ℃ | 3 | |||
| 工作结温 (operating junction temperature) | -25 | 125 | ℃ | 3 | |||
| 最大功耗 (maximum power dissipation) | 0.4 | W | 3 | ||||
| FB 反馈电压 (FB feedback voltage) | VFB | 0.49 | 0.54 | 0.59 | V | 3 | |
| 开关内阻 (switch on-resistance) | Rdson | 35 | 50 | mΩ | VIN=5V，Id=1A | 3 | |
| 最大导通电流 (maximum on-state current) | IMAX | 2.5 | A | VIN=5V | 3 | ||
| DR 漏电流 (DR leakage current) | IDSS | 1 | uA | DR=30V，过压保护模式 | 3 | ||
| 稳压管电流 (zener diode current rating for FB zener mode) | 5 | mA | FB接稳压管与电阻方式，建议使用6.1V稳压管，稳压管电流规格大于5mA即可 | 4 |
CAD (KiCad official)
- Symbol:
LY5802 - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
ly5802-etched.step/ly5802-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ly5802.step/ly5802.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Lingyang Micro datasheet (5 pp, sha256
a800f9474c9b972c, 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).