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slm4055

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by Ray

SOLA IC Battery Management, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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SLM4055

SOLA IC · Battery Management · SOT-23-5

SLM4055 from SOLA IC, in a SOT-23-5. 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 an internal N-channel MOSFET while the battery is charging; goes high-impedance (pulled high externally) when the charge cycle completes. VCHRG rated to +10V absolute max; output-low voltage ~0.35V at 5mA sink.
2 GND power_in Device ground reference. Also serves as the primary thermal path - the ground lead conducts heat from the die to the PCB copper.
3 BAT power_out Charge-current output to the Li-Ion cell. Regulates the final float voltage to 4.2V (±1%) via an internal precision resistor divider that is disconnected in shutdown mode. Supports programmed charge currents up to ~800mA (450mA typical with RPROG=2k, 90mA with RPROG=10k); absolute max VBAT = +8V, BAT short-circuit current 850mA.
4 VCC power_in Positive input supply, 4.25V-6V typical operating range (absolute max +8V, VCC−VBAT lockout 100mV rising). Provides power to the charger and should be bypassed with a 0.1µF-1µF capacitor to ground; ceramic caps can generate transients on live plug-in.
5 PROG bidirectional Charge-current program, monitor, and shutdown pin. Connect a 1% resistor RPROG to GND to set IBAT ≈ 900·VPROG/RPROG (servos to ~1V in constant-current mode). Disconnecting RPROG lets an internal ~3µA pull-up raise the pin to the 1.94V shutdown threshold, entering shutdown (ICC drops to ~25µA). Absolute max IPROG = 800µA; VPROG max = VCC+0.3V.

Key specifications

Parameter Value
Manufacturer SOLA IC
Package SOT-23-5
Category PMIC
Pins 5

CAD (KiCad official)

  • Symbol: SLM4055
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: SOLA IC datasheet (None pp, sha256 45d777edb4d249fc, 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

Symbol & Footprint

Schematic Symbol

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PCB Footprint

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Datasheet

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