component

LM7909CT

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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LM7909CT

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

LM7909CT 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 negative regulator, shown as GND on the TO-220-3 pin drawing.
2 INPUT power_in Unregulated negative input voltage, maximum -35 V at TJ=25°C, with -10.5 V to -25 V specified for the LM7909C output voltage limits.
3 OUTPUT power_out Regulated negative output of -8.60 V to -9.40 V at 5.0 mA to 1.0 A load, with internal short-circuit current limiting and output current in excess of 1.5 A.

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 -8.6 -9.4 V -10.5V ≤ VIN ≤ -25V, 5.0mA ≤ IO ≤ 1.0A 4
Line Regulation ∆UV 86 mV IO = 100mA, -11.8V ≤ VIN ≤ -25V 4
Line Regulation ∆UV 43 mV IO = 100mA, -12V ≤ VIN ≤ -20V 4
Line Regulation ∆UV 172 mV IO = 500mA, -11.8V ≤ VIN ≤ -25V 4
Load Regulation ∆UI 171 mV 5.0mA ≤ IO ≤ 1.5 A 4
Load Regulation ∆UI 86 mV 250mA ≤ IO ≤ 750mA 4
Quiescent Current IB 7.8 mA 4
Quiescent Current Change ∆IB 1.02 mA -10.5V ≤ VIN ≤ -25V 4
Quiescent Current Change ∆IB 0.48 mA 5.0mA ≤ IO ≤ 1.5 A 4
Maximum Input Voltage at TJ=25°C VIN -35 V TJ=25°C 2
Maximum Operating Junction Temperature TJ 125 ℃ 2
Lead Temperature (Soldering, 10 seconds) TL 245 ℃ Soldering, 10 seconds 2
Operating Temperature Range 0 125 ℃ 2

CAD (KiCad official)

  • Symbol: LM7909CT
  • Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
  • 3D model: TO-220-3 (KiCad packages3D, STEP)
  • 3D model files: lm7909ct-etched.step / lm7909ct-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm7909ct.step / lm7909ct.glb are the bare package body.

Provenance

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

  • Datasheet: HGSEMI datasheet (10 pp, sha256 c70f3a4452f8948a, retrieved 2026-11-05, 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