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lm2941mdt

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by Ray

HGSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-4. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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README

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LM2941MDT

HGSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-4

LM2941MDT from HGSEMI, in a TO-252-4. 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 ADJUST output Adjust pin. Feedback node for the external resistor divider (R1/R2) that programs the output voltage per VOUT = VREF x (R1+R2)/R1, where VREF is typically 1.275V. Sets output from 5V to 20V.
2 ON/OFF input TTL/CMOS enable control input. VIN < 0.8V (Von threshold) turns the regulator ON; VIN > 2.0V (Voff threshold) turns it OFF. Input current is typically 50uA (300uA max) at VON/OFF=2.0V. No internal pull; must be externally driven - tie to GND if unused.
3 IN power_in Unregulated input supply. Recommended operating range up to 26V, absolute maximum 45V. A 470nF (or larger) input bypass capacitor is recommended close to the pin.
4 OUT power_out Regulated LDO output, 1A capable with typical 0.6V dropout at 1A (1.0V max). Requires a minimum 22uF tantalum output capacitor with ESR between 0.01Ω and 5Ω for loop stability. Internal short-circuit current limit is typically 1.6A.
5 GND power_in Ground / device reference. On the TO-252-4 package GND is the exposed metal tab on the back of the package (Metal Tab GND); it must be soldered to the board GND plane, which also serves as the primary thermal path (θJA depends on copper area).

Key specifications

Parameter Value
Manufacturer HGSEMI
Package TO-252-4
Category PMIC
Pins 5

Ordering variants

  • LM2941MDT/TR
  • LM2941MDT
  • LM2941MDTT
  • LM2941MDTS/TR
  • LM2941MDTS
  • LM2941MDTDQ4/TR
  • LM2941MDTDQ4

CAD (KiCad official)

  • Symbol: LM2941MDT
  • Footprint: Package_TO_SOT_SMD:TO-252-4
  • 3D model: TO-252-4 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: HGSEMI datasheet (None pp, sha256 b89eb6971c3509b7, retrieved 2026-08-17, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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

Schematic Symbol

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PCB Footprint

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Datasheet

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