# LM7824T

**HGSEMI** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-220

LM7824T from HGSEMI, in a TO-220. 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 | Vcc | power_in | Unregulated input supply pin, which must be held between 27 V and 35 V for the LM7824, with an absolute maximum input voltage of 35 V. |
| 2 | GND | power_in | Ground (common) reference pin for the regulator. |
| 3 | OUT | power_out | Regulated 24 V output (23 V to 25 V at Io = 0.5 A) that supplies up to 1.2 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | TO-220 |
| 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 | 23 | 24 | 25 | V | VI=27V，Io=0.5A，PD≤15W | 6 |
| Input voltage | VI | 27 |  | 35 | V |  | 6 |
| Ambient operating temperature | Tamb | 0 |  | 125 | ℃ |  | 3 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 3 |
| Input voltage (absolute maximum) | VIN |  |  | 35 | V |  | 3 |
| Power dissipation | PD |  |  | 15 | W |  | 3 |
| Lead temperature (soldering 10s) | TLEAD |  |  | 245 | ℃ |  | 3 |
| Line regulation | REGv |  | 3 | 120 | mV | VI=27~35V | 6 |
| Load regulation | REGL |  | 12 | 240 | mV | Io=5mA~1.2A | 6 |
| Ripple rejection | Srip |  | 50 |  | dB | VI=27~35V，Io=100mA，f=120Hz | 6 |
| Maximum output current | IOM |  | 1.2 |  | A |  | 6 |
| Output voltage temperature coefficient | ∆V/T |  | -0.8 |  | mV/℃ | Io=5mA，Tj=0~125℃ | 6 |
| Output noise voltage | VNO |  | 160 |  | µV | f=10Hz~100kHz | 6 |
| Junction-to-ambient thermal resistance (TO-220) | RθJA |  | 23.9 |  | °C/W |  | 3 |
| Junction-to-case (top) thermal resistance (TO-220) | RθJC(top) |  | 16.7 |  | °C/W |  | 3 |
| Junction-to-board thermal resistance (TO-220) | RθJB |  | 5.3 |  | °C/W |  | 3 |
| Junction-to-case (bottom) thermal resistance (TO-220) | RθJC(bot) |  | 1.7 |  | °C/W |  | 3 |
| Junction-to-top characterization parameter (TO-220) | ΨJT |  | 3.2 |  | °C/W |  | 3 |
| Junction-to-board characterization parameter (TO-220) | ΨJB |  | 5.3 |  | °C/W |  | 3 |

## CAD (KiCad official)

- Symbol: `LM7824T`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220 (KiCad packages3D, STEP)
- 3D model files: `lm7824t-etched.step` / `lm7824t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm7824t.step` / `lm7824t.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HGSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8763467781893570560) (11 pp, sha256 `7c51292380972d4a`, retrieved 2026-10-19, 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/lm7824t-datasheet.pdf)