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Texas Instruments BQ2057PDGKR — Power Management (PMIC / Gate Driver)

BQ2057PDGKR Li-Ion/Polymer Charger IC, 4.1V, Obsolete

MPNBQ2057PDGKR
Obsolete

Texas Instruments BQ2057PDGKR, single-cell Lithium Ion/Polymer linear charger IC, 4.1V battery pack voltage, programmable constant-current charging, -20°C to 70°C operating range, 8-VSSOP package, Tape & Reel.

$1.6000Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

BQ2057PDGKR specifications
ParameterValue
MountingSurface Mount
Battery pack voltage4.1V
Supply voltage15V
Current - chargingConstant - Programmable
Operating temperature-20°C~70°C(TA)
PackageTape & Reel (TR)
Case8-TSSOP, 8-MSOP (0.118\", 3.00mm Width)
Number of cells1
Battery chemistryLithium Ion/Polymer
Programmable featuresCurrent

Product details

Single-cell Li-Ion linear charger in 8-VSSOP

The BQ2057PDGKR is a linear charger IC from Texas Instruments designed for single-cell Lithium Ion or Lithium Polymer battery packs. It delivers a constant programmable charge current to a battery pack whose voltage ceiling is set at 4.1V.

This is a constant-current charger with the charge current programmed by a single external resistor — no digital interface, no I2C. The current level is set by the resistor value between the ISET pin and ground, giving the designer direct control over charge rate vs. thermal budget in the 8-VSSOP package. The maximum supply voltage is 15V, so the input rail can come from a 5V USB or a 12V wall adapter without a preregulator.

For a new design, look at TI's current-generation single-cell linear charger family in a comparable package.

Frequently asked questions

What is the charge current for BQ2057PDGKR?

The charge current is constant and programmable via an external resistor. The datasheet provides the resistor value versus current curve; the designer selects the resistor to set the desired charge rate within the thermal limits of the 8-VSSOP package.

Does BQ2057PDGKR work with 4.2V lithium cells?

No. The BQ2057PDGKR terminates charge at 4.1V. Using it with a 4.2V cell will undercharge the battery, leaving approximately 10-15% capacity unused. For 4.2V cells, a charger with a 4.2V termination threshold is required.