LMC7660M from HGSEMI, 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	NC	unconnected	No connection. Leave floating.
2	CAP+	passive	Positive terminal of the external charge-pump 'flying' capacitor (typ. 10 uF). Connects internally to the charge-pump switches that transfer charge from V+ to VOUT.
3	GND	power_in	Ground return. 0 V reference for the input supply and the internal circuitry.
4	CAP-	passive	Negative terminal of the external charge-pump 'flying' capacitor (typ. 10 uF). Switched between GND and VOUT by the internal MOS switches during the pump cycle.
5	VOUT	power_out	Regulated inverted output voltage (nominally -V+). Connect the external reservoir capacitor (typ. 10 uF) from VOUT to GND. Output source resistance is typically 55 ohm at IOUT = 20 mA.
6	LV	input	Low-voltage operation control. Tie to GND to bypass the internal series regulator when V+ is between 1.5V and 3.5V. Leave floating (open) for V+ = 3.5V to 10V to prevent latchup. Max current into LV is 20 uA for V+ > 3.5V.
7	OSC	bidirectional	Oscillator terminal. Internal RC oscillator runs at ~10 kHz nominal at V+ = 5V. An external capacitor to GND lowers the frequency; alternatively this pin can be driven by an external clock. Oscillator impedance is ~100 kohm at V+ = 5V (~1 Mohm at V+ = 2V).
8	V+	power_in	Positive supply input. Operating range 1.5V to 10V; absolute maximum +10.5V. Supply current is typically 170 uA (500 uA max) with no load.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

LMC7660M/TR
LMC7660N
LMC7660MM/TR

CAD (KiCad official)

Symbol: LMC7660M
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
`lmc7660m.step`	122 KB	You want the bare part, or you mark your own boards.
`lmc7660m-etched.step`	1.7 MB	You want the part with `LMC7660M` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 423 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: HGSEMI datasheet (9 pp, sha256 fd1d1dedd842535a, 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