component
LM7812S2
Public Made by Adomby adom
HGSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-263-2. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM7812S2
HGSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-263-2
LM7812S2 from HGSEMI, in a TO-263-2. 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 to the regulator; for the LM7812 the datasheet gives an input range of 14.5 V to 35 V and an absolute maximum input voltage of 35 V. |
| 2 | GND | power_in | Ground reference pin for the regulator, shared between input and output return. |
| 3 | OUT | power_out | Regulated 12 V output (Vo 11.5 V to 12.5 V at Io = 0.5 A) with a maximum output current IOM of 1.2 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | TO-263-2 |
| 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 | 11.5 | 12 | 12.5 | V | VI=19V，Io=0.5A，PD≤15W | 5 |
| Line regulation | REGv | 3 | 120 | mV | VI=16~22V | 5 | |
| Load regulation | REGL | 12 | 240 | mV | Io=5mA~1.2A | 5 | |
| Input voltage | VI | 14.5 | 35 | V | 5 | ||
| Input voltage (absolute maximum) | VIN | 35 | V | 3 | |||
| Power dissipation | PD | 15 | W | 3 | |||
| Operating ambient temperature | Tamb | 0 | 125 | ℃ | 3 | ||
| Storage temperature | Tstg | -55 | 150 | ℃ | 3 | ||
| Lead temperature (soldering 10s) | TLEAD | 245 | ℃ | 3 | |||
| Ripple rejection | Srip | 55 | dB | VI=15~25V，Io=100mA，f=120Hz | 5 | ||
| Maximum output current | IOM | 1.2 | A | 5 | |||
| Output voltage temperature coefficient | ∆V/T | -0.8 | mV/℃ | Io=5mA，Tj=0~125℃ | 5 | ||
| Output noise voltage | VNO | 75 | µV | f=10Hz~100kHz | 5 | ||
| Junction-to-ambient thermal resistance (TO-263 column) | RθJA | 44.8 | °C/W | 3 | |||
| Junction-to-case (top) thermal resistance (TO-263 column) | RθJC(top) | 45.6 | °C/W | 3 | |||
| Junction-to-board thermal resistance (TO-263 column) | RθJB | 24.4 | °C/W | 3 | |||
| Junction-to-case (bottom) thermal resistance (TO-263 column) | RθJC(bot) | 1.5 | °C/W | 3 | |||
| Junction-to-top characterization parameter (TO-263 column) | ΨJT | 11.2 | °C/W | 3 | |||
| Junction-to-board characterization parameter (TO-263 column) | ΨJB | 23.4 | °C/W | 3 |
CAD (KiCad official)
- Symbol:
LM7812S2 - Footprint:
Package_TO_SOT_SMD:TO-263-2 - 3D model: TO-263-2 (KiCad packages3D, STEP)
- 3D model files:
lm7812s2-etched.step/lm7812s2-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm7812s2.step/lm7812s2.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (11 pp, sha256
7c51292380972d4a, retrieved 2026-10-17, 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, primaryclaude-haiku-5-5(text), consensusclaude-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).