TD1509P5 R from Techcode, in a SOP-8. 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 locally with a low-ESR input capacitor to keep switching current loops tight.
2	OUTPUT	output	Switching output (emitter of the internal high-side power transistor). Connects to the external catch diode's cathode and the inductor. Saturation voltage typically 1.2V at Iout=3A; internal current limit ~4.2A peak.
3	FB	input	Output voltage feedback input to the internal error amplifier. Internal reference 1.235V (adjustable version). For fixed 5V version the divider is internal (R1=2.49k, R2=7.57k) so FB is typically tied to VOUT. Feedback bias current typically 10 nA.
4	ON/OFF	input	TTL-compatible shutdown control. Regulator is ON when this pin is Low (VIL ≤ 0.6V typ) or left floating; regulator is OFF when High (VIH ≥ 2.0V). Absolute max range -0.3V to Vin+0.3V. Standby current typically 80 µA when disabled.
5	GND	power_in	Ground. Pins 5-8 are all tied to ground internally and should all be connected to the ground plane; the paired pins also aid heat sinking of the die.
6	GND	power_in	Ground. Pins 5-8 are all tied to ground internally and should all be connected to the ground plane; the paired pins also aid heat sinking of the die.
7	GND	power_in	Ground. Pins 5-8 are all tied to ground internally and should all be connected to the ground plane; the paired pins also aid heat sinking of the die.
8	GND	power_in	Ground. Pins 5-8 are all tied to ground internally and should all be connected to the ground plane; the paired pins also aid heat sinking of the die.

Key specifications

Parameter	Value
Manufacturer	Techcode
Package	SOP-8
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

TD1509P5 R
TD1509P5 RP3
TD1509P5 RPR
TD1509P5 RD5
TD1509P5 RD3
TD1509P5 RDR

CAD (KiCad official)

Symbol: TD1509P5 R
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`td1509p5-r.step`	122 KB	You want the bare part, or you mark your own boards.
`td1509p5-r-etched.step`	2.0 MB	You want the part with `TD1509P5 R` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 496 faces against 147 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 datasheet (17 pp, sha256 8d1cdb542e62ec93, 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