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Texas Instruments BQ2057TTSTR — Power Management (PMIC / Gate Driver)

BQ2057TTSTR Li-Ion/Polymer Charger IC, 8.2V 2-Cell, 8-TSSOP

MPNBQ2057TTSTR
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Texas Instruments BQ2057TTSTR Li-Ion/Polymer charge management IC, 2-cell series, 8.2V battery pack voltage, programmable constant-current, 8-TSSOP surface-mount package, -20°C to 70°C operating temperature.

$3.4200Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BQ2057TTSTR specifications
ParameterValue
MountingSurface Mount
Battery pack voltage8.2V
Supply voltage15V
Current - chargingConstant - Programmable
Operating temperature-20°C~70°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Case8-TSSOP (0.173\", 4.40mm Width)
Number of cells2
Battery chemistryLithium Ion/Polymer
Programmable featuresCurrent

Product details

2-cell Li-ion charger with programmable current

The Texas Instruments BQ2057TTSTR is a charge management IC designed specifically for 2-series Lithium Ion or Lithium Polymer battery packs. It delivers a regulated 8.2 V battery pack voltage and supports constant-current charging that is programmable via an external resistor — no I²C or SMBus needed, just a resistor to set the charge rate.

It is not rated for extended outdoor exposure or under-hood automotive use without additional thermal derating analysis.

Frequently asked questions

Is BQ2057TTSTR compatible with single cell batteries?

No — this part is designed for 2-series cells (8.2 V pack voltage). It is not compatible with single-cell (4.2 V) or 3-series (12.6 V) configurations without external level shifting.

What is the charge current range for BQ2057TTSTR?

The charge current is constant-current and programmable via an external resistor. The datasheet defines the resistor value vs. current relationship; the maximum current is limited by the package thermal dissipation and the 15 V supply ceiling.