TD1507T5 from Techcode Semicon, in a TO-252-5. 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	Vin	power_in	Input supply voltage. Operating range 3.6V to 45V (absolute max 45V). Bypass with a low-ESR input capacitor close to the pin.
2	Output	output	Switching output from the internal NPN power transistor (emitter). Connects to the external catch diode and inductor of the buck converter. Delivers up to 3A load current.
3	GND	power_in	Device ground reference for all internal circuitry and the switching return path.
4	FB	input	Output voltage feedback input to the internal error amplifier. For the fixed 5V version this pin ties directly to the regulated output; internal reference is 1.235V. Typical feedback bias current 10nA.
5	ON/OFF	input	TTL-compatible shutdown control. Regulator is ON when the pin is low (<0.6V typ) or left floating; regulator is OFF (standby, IQ ~80uA) when driven high (>2.0V). Absolute max -0.3V to Vin+0.3V.

Key specifications

Parameter	Value
Manufacturer	Techcode Semicon
Package	TO-252-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

TD1507T5
TD1507T5TR

CAD (KiCad official)

Symbol: TD1507T5
Footprint: Package_TO_SOT_SMD:TO-252-5_TabPin6
3D model: TO-252-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`td1507t5.step`	196 KB	You want the bare part, or you mark your own boards.
`td1507t5-etched.step`	1.6 MB	You want the part with `TD1507T5` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 434 faces against 139 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: Techcode Semicon datasheet (16 pp, sha256 606abcd595801ad9, 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