CN3085 from ShangHai Consonance Elec, 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	TEMP	input	Battery temperature monitoring input. Connect to the output of an NTC divider tied to the battery. Charging is suspended (battery fault) when V(TEMP) is <45% or >80% of VIN. Tie TEMP to GND to disable temperature monitoring. Input current is <=0.5uA.
2	ISET	input	Constant-charge-current programming pin. Connect a resistor RISET from ISET to GND; ICH = 1218V / RISET. V(ISET) is regulated to 0.12V in trickle, 1.205V in CC, and 0.72V in maintenance modes.
3	GND	power_in	Device ground / power return.
4	VIN	power_in	Positive input supply, 3.8V to 6V typical (absolute max 6.5V). Powers the internal circuitry and the pass transistor to BAT. When VIN-VBAT < 10mV, CN3085 enters sleep mode with BAT current <3uA. UVLO threshold ~3.2V (rising).
5	BAT	power_out	Battery connection / charge output. Sources charge current (up to 1A) to the battery positive terminal via the internal PMOS pass transistor. In sleep mode BAT sink current is <3uA. Requires 4.7uF-10uF cap from BAT to GND for stability.
6	RC	passive	Maintenance-charge timer program pin. External R (R5, 20k-5M) and C (C1, >1nF) set the maintenance charge time: T(s) = 2654R5C1 + 4980C11e3. When the timer expires, charging ends.
7	CHRG	output	Open-drain charge status indicator (active-low). Pulled low during trickle, constant-current and maintenance charging; high-Z otherwise (including battery-fault or no-battery states). Sink capability 10mA at V(CHRG)=0.3V; leakage <=1uA at 5.5V. Typically drives an LED to VIN through a series resistor.
8	FB	input	Battery-voltage feedback input. Battery voltage is fed back via R3/R4 divider such that VBAT = VFB * (1 + R3/R4). FB thresholds: VMAX=1.205V (CC ceiling), VCCT=1.083V (CC termination, ~90% of max), VPRE=0.843V (trickle threshold, ~70% of max), VRECH=1.052V (auto-recharge, ~87.3% of max).
EP	EP	power_in	Exposed thermal pad on the underside of the SOP-8-PP package. Solder to the PCB ground copper plane for heat dissipation; required for full charge-current capability.

Key specifications

Parameter	Value
Manufacturer	ShangHai Consonance Elec
Package	SOP-8-EP
Category	PMIC
Pins	9

Ordering variants

Same part, different packaging or reel option.

CN3085

CAD (KiCad official)

Symbol: CN3085
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
`cn3085.step`	193 KB	You want the bare part, or you mark your own boards.
`cn3085-etched.step`	1.5 MB	You want the part with `CN3085` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 357 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: ShangHai Consonance Elec datasheet (13 pp, sha256 424ad4101ca2b6d3, 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