component

LM2731XMF

Public Made by Adom

by adom

Texas Instruments DC-DC Converters, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)lm2731xmffactory-2.0.0extractor-text

Verified LM2731XMF

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, 5 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: LM2731XMF · SOT-23-5 · 5 pins
  • ✓copper: 5 copper pads, none touching another net
  • ✓datasheet: all 5 pin names found in the 30-page datasheet
  • ✓distributor: lcsc C60946, digikey LM2731XMFTR-ND, mouser 926-LM2731XMF
  • ✓family: SOT-23-5
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-67vhwd31/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: 5 pins = 5 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 5 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ lm2731xmf.kicad_sym✓ lm2731xmf.kicad_mod✓ lm2731xmf.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 1d ago
viewers lm2731xmf: viewers · Ray 1d ago
lm2731xmf-etched.glb Publish 0.1.0 · Ray 1d ago
lm2731xmf-etched.step lm2731xmf: factory component page (tier=mfr) · Ray 1d ago
lm2731xmf-hero.glb lm2731xmf: hero GLB from the etched model (keeps the MPN mark) · Ray 1d ago
lm2731xmf-hero.overlay.json Publish 0.1.0 · Ray 1d ago
lm2731xmf.glb Publish 0.1.0 · Ray 1d ago
lm2731xmf.kicad_mod Publish 0.1.0 · Ray 1d ago
lm2731xmf.kicad_sym Publish 0.1.0 · Ray 1d ago
lm2731xmf.lbr Publish 0.1.0 · Ray 1d ago
lm2731xmf.step Publish 0.1.0 · Ray 1d ago
package.json Publish 0.1.0 · Ray 1d ago
page.json Set visibility: public · Ray 1d ago
README.md Publish 0.1.0 · Ray 1d ago
verification.json Verified: Published by the parts factory: tier mfr, 5 pins · Ray 1d ago

LM2731XMF

Texas Instruments · DC-DC Converters · SOT-23-5

LM2731XMF from Texas Instruments, in a SOT-23-5. 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 SW output Drain of the internal DMOS FET switch, rated -0.4 V to 22 V absolute maximum and 3 V to 20 V recommended.
2 GND power_in Analog and power ground for the converter.
3 FB input Feedback point that connects to the external resistive divider, with an absolute maximum pin voltage of -0.4 V to 6 V.
4 SHDN input Logic-level shutdown control input that must not float or exceed VIN + 0.3 V, and should be connected to VIN if the feature is not used.
5 VIN power_in Analog and power input supply, recommended 2.7 V to 14 V.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-23-5
Category Power Management (PMIC)
Pins 5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Operating Junction Temperature -40 125 °C 3
Lead Temperature (Soldering, 5 sec.) 300 °C Soldering, 5 sec. 3
FB Pin Voltage -0.4 6 V 3
SW Pin Voltage -0.4 22 V 3
Input Supply Voltage -0.4 14.5 V 3
SHDN Pin Voltage -0.4 V max VIN + 0.3 V 3
Storage Temperature Tstg -65 150 °C 3
VIN Input Supply Voltage VIN 2.7 14 V 4
SW Pin Voltage Vsw 3 20 V 4
Shutdown Supply Voltage Vshdn 0 V max VIN; pin must not float or exceed VIN + 0.3 V 4
Junction Temperature Range TJ -40 125 ºC 4
VIN Input Voltage VIN 2.7 14 V −40°C ≤ TJ ≤ 125°C 5
Minimum Output Voltage Under Load VOUT (MIN) 7 V RL = 43 Ω, VIN = 2.7 V, X option, TJ = 25°C 5
Minimum Output Voltage Under Load VOUT (MIN) 5.4 V RL = 43 Ω, VIN = 2.7 V, X option, −40°C ≤ TJ ≤ 125°C 5
Minimum Output Voltage Under Load VOUT (MIN) 10 V RL = 43 Ω, VIN = 3.3 V, X option, TJ = 25°C 5
Minimum Output Voltage Under Load VOUT (MIN) 8 V RL = 43 Ω, VIN = 3.3 V, X option, −40°C ≤ TJ ≤ 125°C 5
Minimum Output Voltage Under Load VOUT (MIN) 16 V RL = 43 Ω, VIN = 5 V, X option 5
Minimum Output Voltage Under Load VOUT (MIN) 5 V RL = 15 Ω, VIN = 2.7 V, X option, TJ = 25°C 5
Minimum Output Voltage Under Load VOUT (MIN) 3.75 V RL = 15 Ω, VIN = 2.7 V, X option, −40°C ≤ TJ ≤ 125°C 5
Minimum Output Voltage Under Load VOUT (MIN) 6.5 V RL = 15 Ω, VIN = 3.3 V, X option, TJ = 25°C 5
Minimum Output Voltage Under Load VOUT (MIN) 5 V RL = 15 Ω, VIN = 3.3 V, X option, −40°C ≤ TJ ≤ 125°C 5
Switch Current Limit ISW 1.8 2 A TJ = 25°C 5
Switch Current Limit ISW 1.4 A −40°C ≤ TJ ≤ 125°C 5
Switch ON-Resistance RDS(ON) 260 400 mΩ TJ = 25°C, ISW = 100 mA, Vin = 5 V 5
Switch ON-Resistance RDS(ON) 500 mΩ ISW = 100 mA, Vin = 5 V, −40°C ≤ TJ ≤ 125°C 5
Switch ON-Resistance RDS(ON) 300 450 mΩ TJ = 25°C, ISW = 100 mA, Vin = 3.3 V 5
Switch ON-Resistance RDS(ON) 550 mΩ ISW = 100 mA, Vin = 3.3 V, −40°C ≤ TJ ≤ 125°C 5
Shutdown Threshold, Device ON SHDNTH 1.5 V Device ON, −40°C ≤ TJ ≤ 125°C 5
Shutdown Threshold, Device OFF SHDNTH 0.5 V Device OFF, −40°C ≤ TJ ≤ 125°C 5
Shutdown Pin Bias Current ISHDN 0 µA VSHDN = 0, TJ = 25°C 5
Shutdown Pin Bias Current ISHDN 2 µA VSHDN = 5 V, −40°C ≤ TJ ≤ 125°C 5
Feedback Pin Reference Voltage VFB 1.23 V VIN = 3 V, TJ = 25°C 5
Feedback Pin Reference Voltage VFB 1.205 1.255 V VIN = 3 V, −40°C ≤ TJ ≤ 125°C 5
Feedback Pin Bias Current IFB 60 nA VFB = 1.23 V, TJ = 25°C 5
Feedback Pin Bias Current IFB 500 nA VFB = 1.23 V, −40°C ≤ TJ ≤ 125°C 5
Quiescent Current, X option, switching IQ 2 mA VSHDN = 5 V, Switching, TJ = 25°C 6
Quiescent Current, X option, switching IQ 3 mA VSHDN = 5 V, Switching, −40°C ≤ TJ ≤ 125°C 6
Quiescent Current, not switching IQ 400 µA VSHDN = 5 V, Not Switching, TJ = 25°C 6
Quiescent Current, not switching IQ 500 µA VSHDN = 5 V, Not Switching, −40°C ≤ TJ ≤ 125°C 6
Quiescent Current, shutdown IQ 0.024 1 µA VSHDN = 0 6
FB Voltage Line Regulation ΔVFB/ΔVIN 0.02 %/V 2.7 V ≤ VIN ≤ 14 V 6
Switching Frequency, X option FSW 1.6 MHz TJ = 25°C 6
Switching Frequency, X option FSW 1 1.85 MHz −40°C ≤ TJ ≤ 125°C 6
Maximum Duty Cycle, X option DMAX 86 % TJ = 25°C 6
Maximum Duty Cycle, X option DMAX 78 % −40°C ≤ TJ ≤ 125°C 6
Switch Leakage IL 1 µA Not Switching, VSW = 5 V 6
Junction-to-ambient thermal resistance RθJA 209.9 °C/W DBV (SOT-23), 5 pins 4
Junction-to-case (top) thermal resistance RθJC(top) 122 °C/W DBV (SOT-23), 5 pins 4
Junction-to-board thermal resistance RθJB 38.4 °C/W DBV (SOT-23), 5 pins 4
Junction-to-top characterization parameter ψJT 12.8 °C/W DBV (SOT-23), 5 pins 4
Junction-to-board characterization parameter ψJB 37.5 °C/W DBV (SOT-23), 5 pins 4

CAD (KiCad official)

  • Symbol: LM2731XMF
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: lm2731xmf-etched.step / lm2731xmf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm2731xmf.step / lm2731xmf.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (30 pp, sha256 ff9a7a31b10ac731, 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