# HT7144-1

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

HT7144-1 from FOSAN, in a SOT-89-3L. 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 | Ground reference, provides the negative return path for the regulator. |
| 2 | Vi | power_in | Input voltage supply with operating range of 5.4 V to 24 V and absolute maximum rating of 30 V. |
| 3 | Vo | power_out | Regulated output voltage of 4.4 V nominal (4.312-4.488 V range) at IO=10 mA and VI=6.4 V, capable of supplying up to 100 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | FOSAN |
| 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 | VO | 4.312 | 4.4 | 4.488 | V | IO=10mA, VI=6.4 V | 4 |
| Output Current | IO | 70 | 100 |  | mA | VI=6.4 V | 4 |
| Dropout Voltage | VD |  | 25 | 55 | mV |  | 4 |
| Quiescent Current | Iq |  | 1.5 | 3 | µA | IO=0, VI=6.4 V | 4 |
| Line Regulation | ΔVO/ΔVi*VO |  |  | 0.2 | %/V | IO=1mA, 5.4<VI<24 | 4 |
| Load Regulation | ΔVO |  | 25 | 60 | mV | 1mA<IO<50mA, VI=6.4 V | 4 |
| Input Voltage | Vi |  |  | 30 | V |  | 1 |
| Operating Current | IO |  |  | 100 | mA |  | 1 |
| Power Dissipation (SOT-89) | PD |  |  | 300 | mW | SOT-89 package | 1 |
| Thermal Resistance Junction-Ambient (SOT-89) | RΘJA |  |  | 418 | ℃/W | SOT-89 package | 1 |
| Solder Temperature | Td |  |  | 260 | ℃ | 10 s | 1 |
| Operating Ambient Temperature | TA | -25 |  | 85 | ℃ |  | 1 |
| Junction and Storage Temperature | TJ,Tstg | -50 |  | 125 | ℃ |  | 1 |
| Temperature Coefficient | ΔVO/ΔTa*VO |  | 0 |  | ppm/℃ | IO=10mA, VI=6.4 V, 0℃<Ta<85 | 4 |

## CAD (KiCad official)

- Symbol: `HT7144-1`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3L (KiCad packages3D, STEP)
- 3D model files: `ht7144-1-etched.step` / `ht7144-1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ht7144-1.step` / `ht7144-1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [FOSAN datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604428359895949312) (7 pp, sha256 `3a07afa3fd34fc11`, retrieved 2026-09-21, 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 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/ht7144-1-datasheet.pdf)