component

LM7912T

Public Made by Adom

by adom

HGSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-220-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LM7912T

HGSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-220-3

LM7912T from HGSEMI, in a TO-220-3. 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 LM7912 negative regulator; shown as the bottom lead in the TO-220-3 drawing.
2 Input power_in Unregulated negative input voltage; for the LM7912 the output-spec range is -14.5V to -21V and the absolute maximum input is -35V at TJ=25°C. The metal tab is also marked INPUT.
3 Output power_out Regulated -12V output (-11.52V to -12.48V), with output current in excess of 1.0A and internal short-circuit and thermal protection.

Key specifications

Parameter Value
Manufacturer HGSEMI
Package TO-220-3
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 -11.52 -12.48 V -14.5V VIN -21V; 5.0mA IO 1.0 A 4
Line Regulation ∆UV 114 mV IO = 100mA, -14.5V VIN -30V 4
Line Regulation ∆UV 58.5 mV IO = 100mA, -16V VIN -22V 4
Line Regulation ∆UV 228 mV IO = 500mA, -14.5V VIN -30V 4
Load Regulation ∆UI 228 mV 5.0mA IO 1.5 A 4
Load Regulation ∆UI 114 mV 250mA IO 750mA 4
Quiescent Current IB 7.8 mA 4
Quiescent Current Change ∆IB 1.25 mA -14.5V VIN -30V; 5.0mA IO 1.5 A 4
Quiescent Current Change ∆IB 0.48 mA -14.5V VIN -30V; 5.0mA IO 1.5 A 4
Maximum input voltage -35 V TJ=25°C 2
Maximum operating junction temperature 125 ℃ 2
Lead Temperature (TL) (Soldering, 10 seconds) TL 245 ℃ Soldering, 10 seconds 2

CAD (KiCad official)

  • Symbol: LM7912T
  • Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
  • 3D model: TO-220-3 (KiCad packages3D, STEP)
  • 3D model files: lm7912t-etched.step / lm7912t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm7912t.step / lm7912t.glb are the bare package body.

Provenance

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

  • Datasheet: HGSEMI datasheet (9 pp, sha256 b766f3939281978f, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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