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TP4057

Public Unreviewed

by Ray

UMW Battery Management, SOT-23-6. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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TP4057

UMW · Battery Management · SOT-23-6

TP4057 from UMW, in a SOT-23-6. Pinout and pin descriptions extracted from the datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 CHRG output Open-drain charge status output. Pulled low while a charge cycle is in progress (V_OL ~0.35 V at 5 mA sink, 0.6 V max), high-impedance otherwise. Absolute max terminal voltage -0.3 V to 8 V.
2 GND power_in Device ground reference / return. Connect to system ground; also serves as the thermal reference for internal thermal regulation.
3 BAT power_out Battery terminal. Connects to the positive terminal of the single-cell Li-ion battery; regulates to V_FLOAT = 4.24 V (±1%) at up to 500 mA charge current. Absolute max -0.3 V to 6.5 V; max sink current 600 mA.
4 VCC power_in Input supply pin. Operating range 4.0 V to 6.5 V (absolute max -0.3 V to 6.5 V). Undervoltage lockout at ~3.8 V rising with ~200 mV hysteresis. Bypass with 4.7-10 µF to GND.
5 STDBY output Open-drain charge-complete / standby indicator. Pulled low when the charge cycle has terminated and the battery is fully charged (V_OL ~0.35 V at 5 mA sink, 0.6 V max), high-impedance otherwise. Absolute max terminal voltage -0.3 V to 8 V.
6 PROG input Charge current program pin. Connect a resistor R_PROG from PROG to GND to set the constant-current charge current (R_PROG=10 kΩ → 100 mA typ; R_PROG=2 kΩ → 500 mA typ). Also serves as manual shutdown when pulled above V_MSD ≈ 1.21 V open-circuit. Pin voltage in CC mode ≈ 1.0 V; internal pull-up ≈ 2 µA.

Key specifications

Parameter Value
Manufacturer UMW
Package SOT-23-6
Category PMIC
Pins 6

CAD (KiCad official)

  • Symbol: TP4057
  • 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
tp4057.step 97 KB You want the bare part, or you mark your own boards.
tp4057-etched.step 1.2 MB You want the part with TP4057 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 310 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: UMW datasheet (12 pp, sha256 3c03919324e6444e, 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