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lm2937imp-3-3

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by Ray

Texas Instruments LM2937IMP 3 3 NOPB Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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LM2937IMP-3.3

Texas Instruments LM2937IMP 3 3 NOPB · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223

LM2937IMP-3.3 from Texas Instruments LM2937IMP 3 3 NOPB, in a SOT-223. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 INPUT power_in Unregulated voltage input. Operating range 4.75 V to 26 V continuous (60 V transient <=100 ms). A 0.1 µF bypass capacitor is required if the regulator is located more than 3 inches from the power-supply-filter capacitors.
2 GND power_in Device ground reference. Internally connected to the tab (pin 4) on the SOT-223 (DCY) package.
3 OUTPUT power_out Regulated 3.3-V output (5% tolerance over operating conditions), up to 400 mA in the SOT-223 package. Requires an output capacitor >=10 µF with ESR between 0.01 Ω and 3 Ω for stability (LM2937 is stable for any ESR <=5 Ω).
4 GND (TAB) power_in Thermal and ground tab. Internally connected to device pin 2 (GND). Connect the TAB to a large copper area to remove heat from the device; connect to GND or leave floating - do not connect to any potential other than GND.

Key specifications

Parameter Value
Manufacturer Texas Instruments LM2937IMP 3 3 NOPB
Package SOT-223
Category PMIC
Pins 4

Ordering variants

  • LM2937IMP-3.3/NOPB
  • LM2937IMP-3.3LM2937IMPX-3.3/NOPB
  • LM2937IMP-3.3
  • LM2937IMP-3.3LM2937IMPX-3.3
  • LM2937IMP-3.3LM2937ET-3.3/NOPB
  • LM2937IMP-3.3LM2937ET-3.3
  • LM2937IMP-3.3LM2937ES-3.3/NOPB
  • LM2937IMP-3.3LM2937ESX-3.3/NOPB
  • LM2937IMP-3.3LM2937ES-3.3
  • LM2937IMP-3.3LM2937ESX-3.3

CAD (KiCad official)

  • Symbol: LM2937IMP-3.3
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Texas Instruments LM2937IMP 3 3 NOPB datasheet (None pp, sha256 83a348b42419baea, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

Symbol & Footprint

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Datasheet

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