# HT7133

**KEXIN** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3

HT7133 from KEXIN, in a SOT-89-3. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | GND | power_in | Device ground return. Should be tied to system single-point ground per the application circuit. |
| 2 | VIN | power_in | Unregulated positive supply input, -0.3 V to 28 V absolute max, 4.5 V to 24 V normal operating range for the 3.3 V variant. Bypass with a 10 uF capacitor to GND as shown in the basic application circuit. |
| 3 | VOUT | power_out | Regulated 3.3 V ±5% output (HT7133), 30 mA typical / 20 mA min output current. Requires a 10 uF output capacitor to GND for stability. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KEXIN |
| Package | SOT-89-3 |
| Category | PMIC |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `HT7133`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files: `ht7133-etched.step` / `ht7133-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ht7133.step` / `ht7133.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KEXIN datasheet](docs/ht7133-datasheet.pdf) (5 pp, sha256 `ce94186aa5a83426`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/ht7133-datasheet.pdf)