# TJ7550GF

**HTC Korea TAEJIN Tech** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3L

TJ7550GF from HTC Korea TAEJIN Tech, 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 | GND | power_in | Ground reference pin of the regulator (SOT-89-3L pin 1). |
| 2 | IN | power_in | Input voltage pin; the datasheet rates the operating input supply up to 20 V, with an absolute maximum of 28 V. |
| 3 | OUT | power_out | Regulated output voltage pin, delivering up to 250 mA of load current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HTC Korea TAEJIN Tech |
| 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 |
|---|---|---|---|---|---|---|---|
| Output Voltage | VOUT | -2 |  | 2 | % | IOUT = 1.0 mA | 5 |
| Quiescent Current | IQ |  | 1 | 3 | µA | 1.0 mA ≤ IOUT ≤ 250 mA | 5 |
| Line Regulation | ΔVLINE |  | 0.02 | 0.3 | %/V | VOUT +1.0 V ≤ VIN ≤ 20 V, IOUT = 1.0 mA | 5 |
| Load Regulation | ΔVLOAD |  | 1 | 3 | % | 1.0 mA ≤ IOUT ≤ 250 mA | 5 |
| Dropout Voltage | VDROP |  | 400 | 700 | mV | IOUT = 160 mA, VOUT = 5.0 V | 5 |
| Input Supply Voltage (absolute maximum) | VIN | -0.3 |  | 28 | V |  | 2 |
| Operating Junction Temperature | TJ | -40 |  | 125 | °C |  | 2 |
| Lead Temperature (Soldering, 10 seconds) | TSOL |  |  | 260 | °C |  | 2 |
| Storage Temperature Range | TSTG | -65 |  | 150 | °C |  | 2 |
| Input Supply Voltage (recommended operating) | VIN |  |  | 20 | V |  | 2 |
| Output Current (recommended operating) | IOUT |  |  | 250 | mA |  | 2 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper |  | - TAB TAB Connect to IN. Put a copper plane connected to this pin | 3 |

## CAD (KiCad official)

- Symbol: `TJ7550GF`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files: `tj7550gf-etched.step` / `tj7550gf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tj7550gf.step` / `tj7550gf.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HTC Korea TAEJIN Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603086279169097728) (8 pp, sha256 `69a7cb043877956d`, retrieved 2026-10-18, tier: lcsc)
- **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/tj7550gf-datasheet.pdf)