LPW5209AB5F from LOWPOWER, in a SOT-23-5. Pinout and pin descriptions extracted from the datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	VOUT	power_out	Switched output to the load; source of the internal N-channel high-side MOSFET. Voltage tracks VIN minus IOUT*RDS(ON) (typ. 80mΩ). Bypass with an output capacitor to meet USB inrush requirements.
2	GND	power_in	Device ground reference for internal circuitry and control signals.
3	ISET	input	Programmable current-limit set pin. Connect a resistor from ISET to GND to set the output current limit (e.g. RISET=10K→~680mA, 6.8K→~1000mA, 3.4K→~2000mA). Present on the adjustable LPW5209AB5F variant.
4	EN	input	Active-high device enable. VEN(H) ≥ 1.4V turns the switch on; VEN(L) ≤ 0.4V disables it (shutdown current ~0.1µA). Do not float; may be tied to VIN to keep the part permanently enabled. Must not go negative with respect to GND.
5	VIN	power_in	Input supply pin (2.5V to 6V, abs max 7V) and drain of the internal N-channel MOSFET. Bypass locally with a ceramic input capacitor.

Key specifications

Parameter	Value
Manufacturer	LOWPOWER
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

LPW5209AB5F
LPW5209B5F-21
LPW5209B5F-11
LPW5209B5F-06

CAD (KiCad official)

Symbol: LPW5209AB5F
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lpw5209ab5f.step`	85 KB	You want the bare part, or you mark your own boards.
`lpw5209ab5f-etched.step`	2.1 MB	You want the part with `LPW5209AB5F` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 520 faces against 102 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: LOWPOWER datasheet (7 pp, sha256 def01ef343a1a2c4, 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