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LM337T

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

componentpower management (pmic)lm337tfactory-2.0.0extractor-text

Verified LM337T

by Ray · last 5 Nov 2026 · 1 record · files match
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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: LM337T · TO-220 · 3 pins
  • ✓copper: 3 copper pads, none touching another net
  • ✓datasheet: all 3 pin names found in the 25-page datasheet
  • ✓distributor: lcsc C2869423, digikey LM337TFS-ND, mouser 512-LM337T
  • ✓family: TO-220-3_Vertical
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-0v1e2559/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✓ lm337t.kicad_sym✓ lm337t.kicad_mod✓ lm337t.step
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Contents

README

markdown

LM337T

Texas Instruments · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-220

LM337T from Texas Instruments, 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 ADJUSTMENT passive Adjustment pin for the output voltage; connect two external resistors to adjust the output voltage.
2 INPUT power_in Input voltage; the input voltage and current are designated VI and II, with the input-to-output differential limited to -40 V maximum.
3 OUTPUT power_out Output voltage; the output voltage and current are designated VO and IO, with output current up to 1.5 A.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TO-220
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
Reference voltage (OUTPUT to ADJUSTMENT) VREF -1.213 -1.25 -1.287 V VI, VO = -3 V to -40 V, TJ = 25°C 5
Reference voltage (OUTPUT to ADJUSTMENT) VREF -1.2 -1.25 -1.3 V VI, VO = -3 V to -40 V, IO = 10 mA to 1.5 A, P ≤ rated dissipation, TJ = MIN to MAX 5
Ripple rejection 66 77 dB VO = -10 V, f = 120 Hz, CADJ = 10 μF 5
Input regulation 0.01 0.04 %/V TJ = 25°C, VI, VO = -3 V to -40 V 5
Input regulation 0.02 0.07 %/V TJ = MIN to MAX, VI, VO = -3 V to -40 V 5
Output regulation 50 70 mV /VO/ ≤ 5 V, IO = 10 mA to 1.5 A 5
Output regulation 1 1.5 % /VO/ ≥ 5 V, IO = 10 mA to 1.5 A 5
Output-voltage long-term drift 0.3 1 % After 1000 h at TJ = MAX and VI, VO = -40 V 5
Minimum output current to maintain regulation 1.5 6 mA /VI, VO/ ≤ 10 V 6
Peak output current 1.5 2.2 A /VI, VO/ ≤ 15 V 5
Peak output current 0.15 0.4 A /VI, VO/ ≤ 40 V, TJ = 25°C 5
ADJUSTMENT current 65 100 μA 5
Change in ADJUSTMENT current 2 5 μA VI, VO = -2.5 V to -40 V, IO = 10 mA to MAX, TJ = 25°C 5
Thermal regulation 0.003 0.04 %/W Initial TJ = 25°C, 10-ms pulse 5
Output-voltage change with temperature 0.6 % TJ = MIN to MAX 5
Output noise voltage 0.003 % f = 10 Hz to 10 kHz, TJ = 25°C 5
Ripple rejection 60 dB VO = -10 V, f = 120 Hz 5
Input-to-output differential voltage VI, VO -2.5 -37 V 4
Output current IO 10 1500 mA /VI, VO/ ≤ 40 V, P ≤ 15 W 4
Output current IO 6 1500 mA /VI, VO/ ≤ 10 V, P ≤ 15 W 4
Operating virtual junction temperature TJ 0 125 °C LM337 4
Input-to-output differential voltage VI, VO -40 V 4
Operating virtual junction temperature TJ 150 °C 4
Lead temperature 260 °C 1.6 mm (1/16 in) from case for 10 s 4
Storage temperature range Tstg -65 150 °C 4
Junction-to-ambient thermal resistance RθJA 24.8 °C/W KC and KCS (TO-220) packages 4
Junction-to-case (top) thermal resistance RθJC(top) 3 °C/W KC and KCS (TO-220) packages 4

CAD (KiCad official)

  • Symbol: LM337T
  • Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
  • 3D model: TO-220 (KiCad packages3D, STEP)
  • 3D model files: lm337t-etched.step / lm337t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm337t.step / lm337t.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (25 pp, sha256 9314cd867e85589c, 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