LM2936MPX-5.0 from Texas Instruments, in a SOT-223-4. 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	IN	power_in	Unregulated input voltage. Recommended operating range 5.5 V to 40 V (LM2936); withstands -50 V transients and -24 V reverse polarity. 100 nF decoupling cap required if regulator is >2 inches from supply filter capacitor.
2	GND	power_in	Device ground reference. Tied together internally with pin 4 (tab). Both must be connected to the system ground plane.
3	OUT	power_out	Regulated 5-V output (±2% initial tolerance, ±3% over line/load/temperature). Delivers up to 50 mA. Requires a minimum 10 µF output capacitor with ESR between 0.3 Ω and 8 Ω placed close to the regulator for stability.
4	GND	power_in	Ground / thermal tab. Electrically the same node as pin 2. Provides the primary heatsink path (SOT-223 tab), tie to a ground copper pour to improve thermal performance.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

LM2936MPX-5.0
LM2936MPX-5.0DT
LM2936MPX-5.0DTX
LM2936MPX-5.0M
LM2936MPX-5.0MX
LM2936MPX-5.0BM
LM2936MPX-5.0BMX
LM2936MPX-5.0MM
LM2936MPX-5.0MMX
LM2936MPX-5.0Z
LM2936MPX-5.0ZLP

CAD (KiCad official)

Symbol: LM2936MPX-5.0
Footprint: Package_TO_SOT_SMD:SOT-223
3D model: SOT-223-4 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (42 pp, sha256 ad844917347acb07, retrieved 2026-08-17, tier: lcsc)
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