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XT2055Y42AMR-G

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by Ray

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

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Datasheet

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Contents

README

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XT2055Y42AMR-G

NATLINEAR · Battery Management · SOT-23-6L

XT2055Y42AMR-G from NATLINEAR, in a SOT-23-6L. 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 charging. On charge completion, a weak ~20µA pull-down indicates 'AC present'. High-impedance when the part is in UVLO.
2 GND power_in Device ground reference.
3 BAT power_out Charge current output to the Li-Ion battery. Regulates final float voltage to 4.2V via an internal precision resistor divider (disconnected in shutdown). Rated up to 500mA charge current; abs max Vbat = 7V.
4 VIN power_in Positive input supply (VCC), 4.25V to 6.5V operating (abs max VSS+10V). Bypass with at least 1µF (typ 4.7µF). When VIN falls within ~30mV of VBAT, the part enters shutdown and IBAT drops below 2µA.
5 DONE output Open-drain full-charge indication output. Pulled low by an internal N-channel MOSFET when charging is complete. High-impedance during charging or when input UVLO/OVP conditions are detected.
6 PROG bidirectional Charge current program, current monitor, and shutdown pin. Program IBAT with a 1% resistor RPROG to GND: IBAT = (VPROG/RPROG) x 1000. Servos to 1V in constant-current mode. Disconnecting RPROG lets a 3µA source pull the pin up; crossing the 1.21V threshold puts the part into shutdown (ICC ≈ 25µA). Pin is clamped near 2.4V.

Key specifications

Parameter Value
Manufacturer NATLINEAR
Package SOT-23-6L
Category PMIC
Pins 6

Ordering variants

Same part, different packaging or reel option.

  • XT2055Y42AMR-G
  • XT2055Y42AMR-GM (SOT-23-6L packaging code)

CAD (KiCad official)

  • Symbol: XT2055Y42AMR-G
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6L (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: NATLINEAR datasheet (10 pp, sha256 0675b9722ca8aabb, 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