FP6277XR-G1 from Advanced Analog Technology, in a SOP-8-EP. 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	LX	power_out	Power switch output. Internally tied to the drain of the integrated high-side/low-side MOSFETs; connect to the boost inductor. Absolute max VLX = 7 V. Pins 1 and 2 are tied together internally and must both be connected.
2	LX	power_out	Power switch output (second LX pin, internally tied to pin 1). Connect together with pin 1 to the boost inductor node. Absolute max VLX = 7 V.
3	VIN	power_in	IC power supply input. Operating range 2.4 V-4.5 V (absolute max 6 V). Bypass to GND with a low-ESR ceramic capacitor.
4	EN	input	Enable control, active high. VEN ≥ 0.96 V enables the converter; VEN ≤ 0.6 V places the part in shutdown (ICC ≈ 0.1 µA). Do not leave floating.
5	GND	power_in	IC signal/analog ground. Must be tied to the exposed pad (PGND) and to the system ground plane.
6	FB	input	Error-amplifier inverting input (feedback). Regulated to the internal 0.6 V reference (VREF = 0.588 V-0.612 V). Connect to a resistor divider from VOUT to set the output voltage: VOUT = 0.6 V × (1 + R_top/R_bot).
7	OC	input	Adjustable current-limit setting. Connect a resistor from OC to GND to program the cycle-by-cycle switch current limit (typ. IOCP = 7 A; see Ocset Resistance vs Current Limit curve). Resistor must return to ground.
8	VO	power_in	Output voltage sense pin. Connect to the boost converter output rail; used internally by the MUX/bulk-well switch and load-disconnect circuitry. Absolute max 6 V.
EP	PGND	power_in	Exposed thermal pad / power ground. Must be soldered to the PCB ground plane and connected to GND (pin 5) for proper operation and heat dissipation.

Key specifications

Parameter	Value
Manufacturer	Advanced Analog Technology
Package	SOP-8-EP
Category	PMIC
Pins	9

Ordering variants

Same part, different packaging or reel option.

FP6277XR-G1

CAD (KiCad official)

Symbol: FP6277XR-G1
Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm
3D model: SOP-8-EP (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`fp6277xr-g1.step`	193 KB	You want the bare part, or you mark your own boards.
`fp6277xr-g1-etched.step`	1.6 MB	You want the part with `FP6277XR-G1` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 415 faces against 63 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: Advanced Analog Technology datasheet (12 pp, sha256 583d018398bfcefb, 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