# LY3205E

**Lingyang Micro** · Brushed DC Motor Drivers · SOT-23-6

LY3205E 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 | BAT | power_in | Battery terminal connected to the external lithium battery, which powers the device and is charged through this pin; the battery is protected against over-discharge at 2.9 V (VOD) and the absolute maximum rating for this pin is -0.3 V to 6 V. |
| 2 | GND | power_in | Ground reference for the device. |
| 3 | VIN | power_in | USB 5 V charger input; the datasheet gives an operating range of 4.5 V to 6 V (5 V typical) and an absolute maximum of -0.3 V to 6 V. |
| 4 | EN | input | Active-high enable that may be driven by a switch or an MCU and must not be left floating; the datasheet lists VENH = 0.9 V and VENL = 0.5 V. |
| 5 | VM | output | Motor negative terminal driving the motor; the peak current is 2.6 A, the continuous current is 1.6 A absolute maximum, and the overcurrent protection threshold is typically 2 A. |
| 6 | LED | output | Indicator pin for charging, discharging and low-battery status; the datasheet gives a low-battery flash frequency of 0.5 Hz when VBAT is below 3.2 V and no drive current limit. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Lingyang Micro |
| Package | SOT-23-6 |
| Category | Motor Driver ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| Input supply voltage (VIN) | VIN | 4.5 | 5 | 6 | V |  | 4 |
| VIN pin voltage (absolute maximum) | VIN | -0.3 |  | 6 | V |  | 3 |
| Other pins voltage |  | -0.3 |  | 6 | V |  | 3 |
| VM pin peak current |  |  |  | 2.6 | A |  | 3 |
| VM pin continuous current |  |  |  | 1.6 | A |  | 3 |
| Storage temperature |  | -50 |  | 150 | ℃ |  | 3 |
| Operating junction temperature |  | -25 |  | 125 | ℃ |  | 3 |
| Maximum power dissipation |  |  |  | 0.6 | W |  | 3 |
| ESD (HBM) |  |  |  | 2 | KV |  | 3 |

## CAD (KiCad official)

- Symbol: `LY3205E`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `ly3205e-etched.step` / `ly3205e-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ly3205e.step` / `ly3205e.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Lingyang Micro datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8608757139641159680) (6 pp, sha256 `5e6534736e6824f6`, 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/ly3205e-datasheet.pdf)