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Texas Instruments BQ2057TSNTR — Power Management (PMIC / Gate Driver)

BQ2057TSNTR Li-Ion/Polymer Charger IC, 4.1V, 4mA Max

MPNBQ2057TSNTR
Obsolete

Texas Instruments BQ2057 series, Lithium Ion/Polymer battery charger IC, Surface Mount, 1 ~ 2 cells, 4.1V pack voltage, 4mA max charge current, -20°C~70°C operating temperature.

Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

BQ2057TSNTR specifications
ParameterValue
SeriesBQ2057
MountingSurface Mount
Battery pack voltage4.1V
Supply voltage15V
Current - chargingConstant - Programmable
Charge current - max4mA
Operating temperature-20°C~70°C
PackageBulk
Number of cells1 ~ 2
Fault protectionOver Current, Over Temperature
Battery chemistryLithium Ion/Polymer
Programmable featuresCurrent

Product details

Li-Ion/Polymer charger — 4.1 V pack, 4 mA ceiling

The Texas Instruments BQ2057TSNTR is a linear charge-management IC for single- or dual-cell Lithium Ion/Polymer battery packs, targeting a 4.1 V full-charge voltage. The charge current is constant and programmable, with a maximum of 4 mA — a low-current profile suited for small-capacity cells or trickle-charge applications. On-chip fault protection covers over-current and over-temperature conditions, reducing external supervisory circuitry.

The maximum supply voltage is 15 V.

Frequently asked questions

What is the charge current rating for BQ2057TSNTR?

The maximum charge current is 4 mA, constant and programmable. This is a low-current charger intended for small-capacity Li-Ion/Polymer cells.

Is BQ2057TSNTR compatible with 2-cell batteries?

Yes, the part supports 1 to 2 cells in series, with a battery pack voltage of 4.1 V.