# SD2350D50A

**SHOUDING** · DC-DC Converters · SOT-23

SD2350D50A from SHOUDING, in a SOT-23. 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 | Vss | power_in | Ground pin, which must be well grounded because the internal zero potential otherwise shifts with switching current and makes operation unstable. |
| 2 | Lx | output | Switching pin (or Ext drive for an external transistor) whose LX switch driver produces a turn-off voltage spike, with the datasheet giving a switch on-current of 450 mA at VLX=0.4V for the 3.3V version. |
| 3 | OUT | power_out | Boost output pin, which needs an output capacitor of at least 47 µF with low ESR (tantalum or high-frequency type) placed as close as possible, and the device is rated for 800 mA output current (Iout) maximum. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | SHOUDING |
| Package | SOT-23 |
| Category | Power Management ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| 输出电压 (Output voltage) | Vout | 5.46 | 5.6 | 5.74 | V |  | 4 |
| 无负载输入电流 (No-load input current) | IIN1 | 8 | 15 | 25 | µA | VIN=2.2V 空载 | 4 |
| 静态输入电流 (Static input current) | IIN2 | 1 | 4 | 8 | µA |  | 4 |
| CMOS驱动输出管导通电流 N (CMOS driver N-channel on current) | IEXT N | 22 |  |  | mA | VDS=0.4V | 4 |
| CMOS驱动输出管导通电流 P (CMOS driver P-channel on current) | IEXT P | 20 |  |  | mA | VDS=-0.4V | 4 |
| 振荡频率 (Oscillation frequency) | FOSC | 150 | 200 | 250 | kHz |  | 4 |
| 占空比 (Duty cycle) | Dty | 80 |  |  | % |  | 4 |
| 对地输入电压 (Input voltage to ground) | VIN |  |  | 10 | V |  | 2 |
| 输出电流 (Output current) | Iout |  |  | 800 | mA |  | 2 |
| 功耗 (Power dissipation) | Pd |  |  | 0.25 | W | SOT-23 | 2 |
| 工作温度 (Operating temperature) | TA | -40 |  | 145 | ℃ |  | 2 |
| 导线焊接温度 (Lead soldering temperature) |  |  |  | 260 | ℃ | 10 s | 2 |

## CAD (KiCad official)

- Symbol: `SD2350D50A`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `sd2350d50a-etched.step` / `sd2350d50a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sd2350d50a.step` / `sd2350d50a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [SHOUDING datasheet](docs/sd2350d50a-datasheet.pdf) (9 pp, sha256 `00caedebce8b4833`, retrieved 2026-10-31, 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/sd2350d50a-datasheet.pdf)