Skip to main content
Texas Instruments BQ25121YFPT — Power Management (PMIC / Gate Driver)
Texas Instruments

BQ25121YFPT Li-Ion Charger IC, 300 mA, I²C, DSBGA-25

MPNBQ25121YFPT
NRND

Texas Instruments BQ25121YFPT, single-cell Li-Ion linear battery charger, 300 mA max charge current, I²C programmable, over-voltage protection, 25-bump DSBGA package, -40°C to 125°C operating range.

$6.6100Ref. price · indicative, final on quote
BQ25121YFPT 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

BQ25121YFPT Technical Specifications
ParameterValue
Mounting typeSurface Mount
Battery pack voltage4.2V
Voltage5.5V
Current - chargingConstant - Programmable
Charge current - max300mA
InterfaceI²C
Operating temperature-40°C~125°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
Case25-XFBGA, DSBGA
Number of cells1
Fault protectionOver Voltage
Battery chemistryLithium Ion
Programmable featuresCurrent

Product details

Single-cell Li-Ion charger with I²C trim — 300 mA ceiling

The Texas Instruments BQ25121YFPT is a linear battery charger for single-cell Lithium-Ion packs, delivering a programmable charge current up to 300 mA. The charge current is set over I²C, so the charging profile can be tuned in firmware without a resistor swap. Over-voltage protection is built in.

NRND — not for new designs

That means TI will continue to supply it for existing production, but new BOMs should target a current-production alternate.

Frequently asked questions

What is the direct replacement for BQ25121YFPT?

No official successor is listed on the record. For a current-production alternative within the same charger family, review the BQ2512x series — confirm pin-compatibility and feature set against the BQ25120.

BQ25121YFPT vs BQ25120 key differences

Both are single-cell Li-Ion linear chargers in the same DSBGA package. The BQ25120 adds a buck converter and power-path management; the BQ25121YFPT is a charger-only part with I²C-programmable current. Pin-compatibility should be verified against the respective datasheets.