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Texas Instruments BQ2057CDGKRG4 — Power Management (PMIC / Gate Driver)
Texas Instruments

BQ2057CDGKRG4 Li-Ion/Polymer Charger IC, 4.2V, 1-Cell

MPNBQ2057CDGKRG4
End of Life

Texas Instruments BQ2057CDGKRG4, single-cell Li-Ion/Polymer linear charger IC, constant-current programmable, 4.2V battery pack voltage, 15V max supply, -20°C to 70°C, 8-VSSOP package.

BQ2057CDGKRG4 datasheet
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

BQ2057CDGKRG4 Technical Specifications
ParameterValue
Mounting typeSurface Mount
Battery pack voltage4.2V
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/Polymer linear charger — 4.2 V regulated output

The Texas Instruments BQ2057CDGKRG4 is a linear charge-management IC designed for single-cell Lithium Ion or Lithium Polymer battery packs. It regulates the charge voltage to 4.2 V and uses a constant-current, constant-voltage (CC/CV) profile — the charge current is set by an external resistor, making it programmable rather than fixed. The device accepts a supply up to 15 V, which covers most 5 V USB adapters and 9–12 V wall-wart inputs.

Package and mounting — 8-VSSOP on tape and reel

It ships in Tape & Reel (TR) format, ready for automated pick-and-place assembly.

Frequently asked questions

What is the charge current for BQ2057CDGKRG4?

The charge current is constant and programmable — set by an external resistor connected to the PROG pin. The datasheet provides the resistor value vs. current table; the current is not fixed internally, so you select it per the battery capacity.

Does BQ2057CDGKRG4 support Lithium Polymer batteries?

Yes, the BQ2057CDGKRG4 is specified for both Lithium Ion and Lithium Polymer chemistries. The 4.2 V regulated output matches the standard full-charge voltage for a single Li-Po cell.