BQ2057WSNTR

Product Summary

The BENCHMARQ bq2057 series advanced Lithium-Ion (Li-Ion) and Lithium-Polymer (Li-Pol) linear charge-management ICs are designed for costsensitive and compact portable electronics. They
combine high-accuracy current and voltage regulation,battery conditioning, temperature monitoring, charge termination, charge-status indication, and AutoComp
charge-rate compensation in a single 8-pin IC. MSOP,TSSOP, and SOIC package options are offered to fit a wide range of end applications.

Parametrics

Absolute maximum ratings over operating free-air temperature (unless otherwise noted):

1. Supply voltage (VCC with respect to GND):-0.3 to +18 V
2. Input voltage, SNS, BAT, TS, COMP (all with respect to GND):-0.3 V to  Vcc+0.3 V
3. Sink current (STAT pin) not to exceed PD:20 mA
4. Source current (STAT pin) not to exceed PD:10 mA
5. Output current (CC pin) not to exceed PD: 40 mA
6. Total power dissipation, PD (at 25℃):300mW 
7. Operating free-air temperature range, TA :-20℃ to 70℃
8. Storage temperature range, Tstg:-40℃ to 125℃
9. Lead temperature (soldering, 10 s) :300℃

Features

1. Ideal for Single (4.1 V or 4.2 V) and Dual-Cell (8.2 V or 8.4 V) Li-Ion or Li-Pol Packs
2. Requires Small Number of ExternalComponents
3. 0.3 V Dropout Voltage for Minimizing Heat Dissipation
4. Better Than ±1% Voltage Regulation Accuracy With Preset Voltages
5. AutoComp Dynamic Compensation of Battery Pack’s Internal Impedance to Reduce Charge Time
6. Optional Cell-Temperature Monitoring Before and During Charge
7. Integrated Voltage and Current Regulation With Programmable Charge-Current and Highor Low-Side Current Sensing
8. Integrated Cell Conditioning for Reviving Deeply Discharged Cells and Minimizing Heat Dissipation During Initial Stage Of Charge
9. Charge Status Output for Single or Dual Led or Host Processor Interface
10. Automatic Battery-Recharge Feature
11. Charge Termination by Minimum Current
12. Automatic Low-Power Sleep Mode When VCC Is Removed
13. EVMs Available for Quick Evaluation
14. Packaging: 8-Pin SOIC, 8-Pin TSSOP, 8-Pin MSOP

Diagrams