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BQ2057 Status: ACTIVE

Low Dropout Linear 1-cell Li-Ion Charge Controller with AutoCompTM, 4.1V


      
         
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 BQ2057BQ2057C BQ2057T BQ2057W 
# Series Cells1  1  2  2  
Charge Current(Max)(A)>2  >2  >2  >2  
Charge Status Outputs1  1  1  1  
Control TopologyLinear  Linear  Linear  Linear  
Primary Charge Termination MethodMinimum Current  Minimum Current  Minimum Current  Minimum Current  
Pin/Package8MSOP, 8SOIC, 8TSSOP  8MSOP, 8SOIC, 8TSSOP  8SOIC, 8TSSOP  8SOIC, 8TSSOP  
Vin(Max)(V)18  18  18  18  
Battery Charge Voltage(V)4.1  4.2  8.2  8.4  
 SamplesSamplesSamplesSamples
 InventoryInventoryInventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • BQ2057C: Low Dropout Linear 1-cell Li-Ion Charge Controller with AutoCompTM, 4.2V
  • BQ2057W: Low Dropout Linear 2-cell Li-Ion Charge Controller with AutoCompTM, 8.4V
  • TPS65053: 5-Channel Power Mgmt IC with two step down converters and 3 low-input voltage LDOs
  • TPS61085: 18.5V, 2A, 650kHz, 1.2MHz Step-Up DC-DC Converter with Forced PWM Mode
  • TL494: PWM Control Circuit

Product Information

Features

  • 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
  • Requires Small Number of External Components
  • 0.3 V Dropout Voltage for Minimizing Heat Dissipation
  • Better Than ±1% Voltage Regulation Accuracy With Preset Voltages
  • AutoComp™ Dynamic Compensation of Battery Pack’s Internal Impedance to Reduce Charge Time
  • Optional Cell-Temperature Monitoring Before and During Charge
  • Integrated Voltage and Current Regulation With Programmable Charge-Current and High-or Low-Side Current Sensing
  • Integrated Cell Conditioning for Reviving Deeply Discharged Cells and Minimizing Heat Dissipation During Initial Stage Of Charge
  • Charge Status Output for Single or Dual Led or Host Processor Interface
  • Automatic Battery-Recharge Feature
  • Charge Termination by Minimum Current
  • Automatic Low-Power Sleep Mode When VCC Is Removed
  • EVMs Available for Quick Evaluation
  • Packaging: 8-Pin SOIC, 8-Pin TSSOP, 8-Pin MSOP

AutoComp is a trademark of Texas Instruments.

Description

The BENCHMARQ bq2057 series advanced Lithium-Ion (Li-Ion) and Lithium-Polymer (Li-Pol) linear charge-management ICs are designed for cost-sensitive 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.

The bq2057 continuously measures battery temperature using an external thermistor. For safety, the bq2057 inhibits charge until the battery temperature is within user-defined thresholds. The bq2057 then charges the battery in three phases: conditioning, constant current, and constant voltage.

View All Description in Datasheet

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
BQ2057DGKACTIVE-20 to 700.80 | 1kuMSOP (DGK) | 8 View 80 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
BQ2057DGKG4ACTIVE-20 to 700.80 | 1kuMSOP (DGK) | 8 View 80 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
BQ2057DGKRACTIVE-20 to 700.70 | 1kuMSOP (DGK) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
BQ2057DGKRG4ACTIVE-20 to 700.70 | 1kuMSOP (DGK) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
BQ2057SNACTIVE-20 to 700.70 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
BQ2057SNG4ACTIVE-20 to 700.70 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
BQ2057TSACTIVE-20 to 700.70 | 1kuTSSOP (PW) | 8 View 150 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
BQ2057TSG4ACTIVE-20 to 700.70 | 1kuTSSOP (PW) | 8 View 150 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 12:16 PM GMT, 20 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 14 WeeksBQ2057DGK
AmericasRochester Electronics >1k
AsiaWPI 63
WorldwideDigiKey 128
TI Lead Time*: 14 WeeksBQ2057DGKG4
WorldwideDigiKey  Available
Mouser Electronics 30
TI Lead Time*: 20 WeeksBQ2057DGKR
AmericasRochester Electronics >1k
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksBQ2057DGKRG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksBQ2057SN
AmericasRochester Electronics >1k
AsiaWPI 50
WorldwideDigiKey 145
Mouser Electronics 369
TI Lead Time*: 20 WeeksBQ2057SNG4
None Reported
View Distributors
TI Lead Time*: 20 WeeksBQ2057TS
AmericasNewark 431
Rochester Electronics >1k
AsiaFarnell Asia 431
WPI 235
WorldwideDigiKey 129
Mouser Electronics 206
TI Lead Time*: 20 WeeksBQ2057TSG4
None Reported
View Distributors
View all Distributors  

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

 Product ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
BQ2057DGK RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ2057DGKG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ2057DGKR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ2057DGKRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ2057SN RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
BQ2057SNG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
BQ2057TS RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
BQ2057TSG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for BQ2057 Help

Datasheet

Reference Designs

Description Part # Company
LDO, Buck/Boost, 2 Sync Buck, Sync Boost Reference Design PR038 Texas Instruments

Tools & Software

NamePart # Company Tool / Software Type
Temp Sense Designer SoftwareTEMPSENSE-SWTexas InstrumentsAnalysis Software
BQ2057 Evaluation Module for Li-Ion, linear (4.1V), one cellDV2057Texas InstrumentsDevelopment Boards/EVMs
Quick Search Selection Tool for Battery ChargersBATTERY_CHARGERS_SELECTION_TOOLTexas InstrumentsFree Evaluation Tools

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
BQ2057C Low Dropout Linear 1-cell Li-Ion Charge Controller with AutoCompTM, 4.2V BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
BQ2057W Low Dropout Linear 2-cell Li-Ion Charge Controller with AutoCompTM, 8.4V BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
TPS65053 5-Channel Power Mgmt IC with two step down converters and 3 low-input voltage LDOs POWER MANAGEMENT MULTI-CHANNEL IC (PMIC) SOLUTIONS-PMIC SOLUTIONS WITH AND WITHOUT BATTERY CHARGER TI customers also evaluated this product.
TPS61085 18.5V, 2A, 650kHz, 1.2MHz Step-Up DC-DC Converter with Forced PWM Mode DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-UP REGULATORS TI customers also evaluated this product.
TL494 PWM Control Circuit AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
TL431 Adjustable Precision Shunt Regulator VOLTAGE REFERENCE-SHUNT VOLTAGE REFERENCE TI customers also evaluated this product.

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