TC4059 from Shenzhen Fuman, in a ESOP-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	TEMP	input	Battery temperature sense input. Connect to the divider between VCC, an NTC thermistor and GND. Charging is suspended when V(TEMP) < 30% VCC (hot) or > 60% VCC (cold). Tie to GND to disable the NTC feature; other charging functions remain normal.
2	PROG	passive	External charge-current programming pin. A resistor from PROG to GND sets fast-charge current per I_BAT = V_PROG / R_PROG × 1700 (V_PROG = 1V in CC mode, 0.1V in trickle mode). Also used to monitor instantaneous charge current. 1% precision resistor recommended.
3	GND	power_in	Device ground / power return.
4	VCC	power_in	Input supply. Normal operating range 4.5-6V (typical 5V); OVP trips at ~7V (6.7-7.3V) and absolute max is 36V (slow ramp), enabling survival of hot-plug transients. UVLO ~3.5V rising with 100mV hysteresis.
5	BAT	power_out	Battery connection / charge current output. Regulates to 4.2V float and sources the programmed charge current up to 1A. High-voltage tolerant to 30V; sleep-mode leakage ≤ 30nA. Bypass with 1-10µF to GND close to the pin.
6	STDBY	output	Open-drain charge-complete indicator. Internally pulled low (up to 5mA) when charging has terminated (charge current has fallen below I_TERM); high-impedance otherwise. Absolute max 7V.
7	CHRG	output	Open-drain charging status indicator. Pulled low (up to 5mA) while a charge cycle is in progress; high-impedance otherwise. Typically drives an LED to indicate charging activity. Absolute max 7V.
8	EN	input	Chip enable input, TTL/CMOS compatible. Logic high (V > 1V typ) enables normal operation; logic low (V < 0.9V typ) puts the device into shutdown (~22µA). Absolute max 7V; leakage ±1µA.

Key specifications

Parameter	Value
Manufacturer	Shenzhen Fuman
Package	ESOP-8
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

TC4059E
TC4059D3
TC4059D2
TC4059S

CAD (KiCad official)

Symbol: TC4059
Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm
3D model: ESOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tc4059.step`	193 KB	You want the bare part, or you mark your own boards.
`tc4059-etched.step`	1.2 MB	You want the part with `TC4059` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 309 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: Shenzhen Fuman datasheet (10 pp, sha256 ee4d4d1e5d946092, 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