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LP4057B6F

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by Ray

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

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Datasheet

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Contents

README

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LP4057B6F

LOWPOWER · Battery Management · SOT-23-6

LP4057B6F from LOWPOWER, 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 CHRG output Open-drain charge status output. Pulled low by internal N-channel MOSFET while charging; high impedance when charge cycle is complete or in UVLO. Sink capability ~5mA; VOL ≤ 0.5V at 5mA.
2 GND power_in Device ground reference. Connect to system ground; also serves as the reference for RISET and input/output bypass capacitors.
3 BAT power_out Charge current output to the battery. Regulates the final float voltage to 4.2V ±1%. Supports up to 600mA charge current; also monitored internally for recharge threshold (~4.0V) and trickle-charge threshold (~3.0V). Bypass with 10µF capacitor.
4 IN power_in Positive input supply voltage (adapter or USB). Recommended 4.5V-6.5V (abs max 10V). UVLO rising threshold 3.8V. Bypass with 10µF capacitor (add ~1Ω series resistor with X5R ceramic to damp start-up transients).
5 FULL output Open-drain charge status output (complementary to CHRG). Pulled high (high impedance) by internal N-channel MOSFET while charging; pulled low when charge cycle is complete. Sink capability ~5mA; VOL ≤ 0.5V at 5mA.
6 ISET input Charge current program and monitor pin. Connect a 1% resistor RISET to GND to set charge current: IBAT = 1000 / RISET (e.g. 2kΩ → 500mA, 10kΩ → 100mA). In constant-current mode, this pin servos to 1V; VISET/RISET × 1000 gives instantaneous IBAT. Termination detected when VISET falls below ~100mV (C/10, ~15% of IBAT).

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • LP4057B6F

CAD (KiCad official)

  • Symbol: LP4057B6F
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: LOWPOWER datasheet (8 pp, sha256 e576ff14d60679ed, 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