LP103SB6F from LOWPOWER, in a SOT-23-6. 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	D+	bidirectional	USB D+ data line input/output. Used for BC1.2 handshake and for driving the DCP/QC/SFCP/FCP protocol voltages (0.325V/0.6V/1V/2V/3V/3.3V) via internal switches and detectors.
2	GND	power_in	Device ground reference for all internal circuitry, analog and power return.
3	FBO	output	Feedback loop drive output. Connects to the reference/feedback input of the external power-supply error amplifier to set the VBUS output voltage. FBO sources current in ~2µA steps to program 5V/9V/12V/20V (QC2.0) or continuous mode with ±0.2V steps (QC3.0). Typical divider uses a fixed 100kΩ high-side resistor: VBUS = (100k/RLS + 1) x VFB.
4	QC_EN	input	High-Voltage Quick Charge enable. Drive low to disable HVQC (Qualcomm QC2.0/3.0) for high-current low-voltage applications. Drive high (or leave floating) to enable HVQC operation. Internally pulled high by a 2µA current source. VIH = VPS-1V, VIL = 1V max.
5	PS	power_in	Power Source pin for the internally generated supply. Fed from VBUS through a series resistor (~2.2kΩ recommended) so the internal shunt regulator sees <8mA; also requires a decoupling capacitor to GND. VPS operating range 3.1V to 6.3V (typ 4.3V), shunt clamp ~6.2V, UVLO threshold ~2.7V.
6	D-	bidirectional	USB D- data line input/output. Used for BC1.2 short-detect handshake and for driving/monitoring the DCP/QC/SFCP protocol voltages. Internal ~19.53kΩ pull-down (RDM(DWN)) is switched in during QC handshake.

Key specifications

Parameter	Value
Manufacturer	LOWPOWER
Package	SOT-23-6
Category	Interface
Pins	6

Ordering variants

Same part, different packaging or reel option.

LP103SB6F
LP103SB6FSOF

CAD (KiCad official)

Symbol: LP103SB6F
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

Provenance

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

Datasheet: LOWPOWER datasheet (9 pp, sha256 59508ad8558dfa87, 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