FM7021DB from Shenzhen Fuman, 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	OD	output	Discharge control MOSFET gate connection terminal. Drives external N-MOSFET (M1) gate; outputs high (VDD-0.02V typ) in normal state and low (0.2V typ) when overdischarge, discharge overcurrent, or load short is detected.
2	OC	output	Charge control MOSFET gate connection terminal. Drives external N-MOSFET (M2) gate; outputs high in normal state and low when overcharge or charge overcurrent is detected. High-voltage tolerant relative to VDD (absolute max VDD-25V to VDD+0.3V).
3	CS	input	Overcurrent detection input and charger detection terminal. Senses voltage drop across the external discharge/charge MOSFETs to detect discharge overcurrent (+200mV), charge overcurrent (-170mV), and load short (1.0V). High-voltage tolerant (absolute max VDD-25V to VDD+0.3V).
4	VC	input	Midpoint sense terminal: connects to negative terminal of cell 1 and positive terminal of cell 2. Used with VDD and VSS to independently monitor each cell's voltage. Typically bypassed with 0.1uF to VSS via 330Ω series resistor.
5	VDD	power_in	Positive power supply input; connects to positive terminal of cell 1 (top of 2-cell stack). Operating range 1.5V to 10V (VDD-VSS); absolute max 10V. Typical bypass 0.1uF via 330Ω to top cell.
6	VSS	power_in	Ground / negative power supply input; connects to negative terminal of cell 2 (bottom of 2-cell stack). Reference for all detection thresholds.

Key specifications

Parameter	Value
Manufacturer	Shenzhen Fuman
Package	SOT-23-6
Category	PMIC
Pins	6

Ordering variants

Same part, different packaging or reel option.

FM7021DB

CAD (KiCad official)

Symbol: FM7021DB
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`fm7021db.step`	97 KB	You want the bare part, or you mark your own boards.
`fm7021db-etched.step`	1.5 MB	You want the part with `FM7021DB` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 373 faces against 117 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: Shenzhen Fuman datasheet (5 pp, sha256 374a77d0afa2cac4, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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