component

LM7909L-TA3-T

Public Made by Adom

by adom

UTC(Unisonic Tech) Linear Voltage Regulators (LDO), TO-220. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management icslm7909l-ta3-tfactory-2.0.0extractor-text

Verified LM7909L-TA3-T

by Ray · last 5 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

5 Nov 2026RayPublished by the parts factory: tier mfr, 3 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: LM7909L-TA3-T · TO-220 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 8-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: TO-220-3_Vertical
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-8kh5nz8r/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 3 pins = 3 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 3 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ lm7909l-ta3-t.kicad_sym✓ lm7909l-ta3-t.kicad_mod✓ lm7909l-ta3-t.step
Spot something wrong? Report it as an issue Propose a fix Records are signed by members of adom.
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 2d ago
viewers lm7909l-ta3-t: viewers · Ray 2d ago
lm7909l-ta3-t-etched.glb Publish 0.1.0 · Ray 2d ago
lm7909l-ta3-t-etched.step lm7909l-ta3-t: factory component page (tier=mfr) · Ray 2d ago
lm7909l-ta3-t-hero.glb lm7909l-ta3-t: hero GLB from the etched model (keeps the MPN mark) · Ray 2d ago
lm7909l-ta3-t-hero.overlay.json Publish 0.1.0 · Ray 2d ago
lm7909l-ta3-t.glb Publish 0.1.0 · Ray 2d ago
lm7909l-ta3-t.kicad_mod Publish 0.1.0 · Ray 2d ago
lm7909l-ta3-t.kicad_sym Publish 0.1.0 · Ray 2d ago
lm7909l-ta3-t.lbr Publish 0.1.0 · Ray 2d ago
lm7909l-ta3-t.step Publish 0.1.0 · Ray 2d ago
package.json Publish 0.1.0 · Ray 2d ago
page.json Set visibility: public · Ray 2d ago
README.md Publish 0.1.0 · Ray 2d ago
verification.json Verified: Published by the parts factory: tier mfr, 3 pins · Ray 2d ago

LM7909L-TA3-T

UTC(Unisonic Tech) · Linear Voltage Regulators (LDO) · TO-220

LM7909L-TA3-T from UTC(Unisonic Tech), 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 GND power_in Common ground pin of the -9V regulator; the datasheet gives no separate electrical limit for this pin.
2 INPUT power_in Negative unregulated input supply, with an absolute maximum input voltage of -35V; the LM7909 output is specified with VIN from -11.5V to -23V (test condition VIN=-15V).
3 OUTPUT power_out Regulated -9V output (typical -9.0V at TJ=25C) that is current-limited to 1A, with a typical peak current of 2.2A.

Key specifications

Parameter Value
Manufacturer UTC(Unisonic Tech)
Package TO-220
Category Power Management ICs
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 VOUT -8.64 -9 -9.36 V TJ=25C 5
Output Voltage VOUT -8.55 -9.45 V VIN=-11.5V~-23V, IOUT=5mA~1A, PD≦15W 5
Line Regulation VOUT 10 180 mV VIN=-11.5V~-26V TJ=25C 5
Line Regulation VOUT 5 90 mV VIN=-12V~-18V TJ=25C 5
Load Regulation VOUT 12 180 mV IOUT=5mA~1A TJ=25C 5
Load Regulation VOUT 4 90 mV IOUT=250mA~750mA TJ=25C 5
Quiescent Current IQ 3 6 mA TJ=25C 5
Quiescent Current Change IQ 0.05 0.5 mA IOUT=5mA~1A 5
Quiescent Current Change IQ 0.1 1 mA VIN=-11.5V~-26V 5
Ripple Rejection RR 54 60 dB VIN=-12.5V~-22.5V, f=120Hz 5
Input Voltage VIN -35 V 3
Output Current IOUT 1 A 3
Operating Temperature TOPR -40 85 C 3
Storage Temperature TSTG -65 150 C 3
Junction to Ambient Thermal Resistance θJA 65 C /W 3
Junction to Case Thermal Resistance θJC 5 C /W 3
Dropout Voltage VD 2 V IOUT=1A TJ=25C 5
Output Noise Voltage eN 175 μV f=10Hz~100kHz TA=25C 5
Output Voltage Drift VOUT/T -0.6 mV/C IOUT=5mA 5
Peak Current IPEAK 2.2 A TJ=25C 5

CAD (KiCad official)

  • Symbol: LM7909L-TA3-T
  • Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
  • 3D model: TO-220 (KiCad packages3D, STEP)
  • 3D model files: lm7909l-ta3-t-etched.step / lm7909l-ta3-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm7909l-ta3-t.step / lm7909l-ta3-t.glb are the bare package body.

Provenance

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

  • Datasheet: UTC(Unisonic Tech) datasheet (8 pp, sha256 48805386c54c2ca0, retrieved 2026-11-05, tier: manufacturer)
  • 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