component

LM2937IMPX-12

Public Made by Adom

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Texas Instruments Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)lm2937impx-12factory-2.0.0extractor-text

Verified LM2937IMPX-12

by Ray · last 6 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

6 Nov 2026RayPublished by the parts factory: tier mfr, 4 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: LM2937IMPX-12 · SOT-223-4 · 4 pins
  • ✓copper: 4 copper pads, none touching another net
  • ✓datasheet: all 4 pin names found in the 35-page datasheet
  • ✓distributor: lcsc C2865816, digikey LM2937IMPX-12-ND, mouser 926-LM2937IMPX-12
  • ✓family: SOT-223
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-rs53unhr/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: 4 pins = 4 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 4 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ lm2937impx-12.kicad_sym✓ lm2937impx-12.kicad_mod✓ lm2937impx-12.step
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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 5h ago
viewers lm2937impx-12: viewers · Ray 5h ago
lm2937impx-12-etched.glb Publish 0.1.0 · Ray 5h ago
lm2937impx-12-etched.step lm2937impx-12: factory component page (tier=mfr) · Ray 5h ago
lm2937impx-12-hero.glb lm2937impx-12: hero GLB from the etched model (keeps the MPN mark) · Ray 5h ago
lm2937impx-12-hero.overlay.json Publish 0.1.0 · Ray 5h ago
lm2937impx-12.glb Publish 0.1.0 · Ray 5h ago
lm2937impx-12.kicad_mod Publish 0.1.0 · Ray 5h ago
lm2937impx-12.kicad_sym Publish 0.1.0 · Ray 5h ago
lm2937impx-12.lbr Publish 0.1.0 · Ray 5h ago
lm2937impx-12.step Publish 0.1.0 · Ray 5h ago
package.json Publish 0.1.0 · Ray 5h ago
page.json Set visibility: public · Ray 5h ago
README.md Publish 0.1.0 · Ray 5h ago
verification.json Verified: Published by the parts factory: tier mfr, 4 pins · Ray 5h ago

LM2937IMPX-12

Texas Instruments · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4

LM2937IMPX-12 from Texas Instruments, in a SOT-223-4. 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 INPUT input Unregulated voltage input; the recommended input range is VOUT + 1 V to 26 V, with 60 V transient protection.
2 GND power_in Ground reference pin for the regulator.
3 OUTPUT output Regulated voltage output that requires an output capacitor to maintain stability, with ESR stable below 3 Ω.
4 TAB power_in Thermal and ground connection internally tied to device pin 2 (GND); connect to GND or leave floating and do not connect to any other potential.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-223-4
Category Power Management (PMIC)
Pins 4

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 11.64 12 12.36 V TA = TJ = 25°C, 5 mA ≤ IOUT ≤ IOUT(MAX) 7
Output voltage VOUT 11.4 12 12.6 V 5 mA ≤ IOUT ≤ IOUT(MAX) 7
Dropout voltage VDROPOUT 0.5 1 V IOUT = IOUT(MAX) 7
Dropout voltage VDROPOUT 110 250 mV IOUT = 50 mA 7
Line regulation 36 120 mV (VOUT + 2V) ≤ VIN ≤ 26V, IOUT = 5 mA 7
Load regulation 12 120 mV 5 mA ≤ IOUT ≤ IOUT(MAX) 7
Quiescent current IQ 2 10 mA (VOUT + 2V) ≤ VIN ≤ 26V, IOUT = 5 mA 7
Quiescent current IQ 10 20 mA VIN = (VOUT + 5V), IOUT = IOUT(MAX) 7
Short-circuit current ISC 0.6 1 A 7
Peak line transient voltage 60 75 V tf < 100 ms, RL = 100 Ω 7
Maximum operational input voltage VIN 26 V 7
Reverse DC input voltage VIN -15 -30 V VOUT ≥ -0.6 V, RL = 100 Ω 7
Reverse transient input voltage VIN -50 -75 V tr < 1 ms, RL = 100 Ω 7
Junction temperature (LM2937IMP, DCY) TJ -40 85 °C Recommended operating free-air temperature range, DCY (SOT-223) package 4
Input voltage VIN 26 V VOUT + 1 V ≤ VIN ≤ 26 V 4
Output capacitor COUT 10 µF Minimum capacitance over full expected operating temperature range 13
Input voltage continuous VIN 26 V Continuous 4
Input voltage transient VIN 60 V t ≤ 100 ms 4
Maximum junction temperature TJ 150 °C 4
Junction-to-ambient thermal resistance RθJA 58.3 °C/W DCY (SOT-223), 4 pins 4
Junction-to-case (bottom) thermal resistance RθJC(bot) 22.5 °C/W DCY (SOT-223), 4 pins 4
Junction-to-case (top) thermal resistance RθJC(top) 39.2 °C/W DCY (SOT-223), 4 pins 4

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts copper is practical to the package. The ground connections for CIN and COUT should be back to the LM2937 ground pin using as wide, and as short, of a copper trace as is practical. 18

CAD (KiCad official)

  • Symbol: LM2937IMPX-12
  • Footprint: Package_TO_SOT_SMD:SOT-223
  • 3D model: SOT-223-4 (KiCad packages3D, STEP)
  • 3D model files: lm2937impx-12-etched.step / lm2937impx-12-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm2937impx-12.step / lm2937impx-12.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (35 pp, sha256 de6b9175f075271f, retrieved 2026-11-06, 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