2057W

Product Overview

2057W is commonly associated with Texas Instruments bq2057W / BQ2057WSN series advanced linear charge-management ICs for single-cell and two-cell Lithium-Ion or Lithium-Polymer battery packs. The device integrates high-accuracy voltage and current regulation, battery conditioning, charge termination, temperature monitoring, charge-status indication and AutoComp™ charge-rate compensation in a compact 8-pin package. With preset 4.1V / 4.2V or 8.2V / 8.4V battery regulation options depending on version, low dropout operation and low-power sleep mode, it is suitable for portable electronics, battery chargers, handheld devices, embedded power boards and legacy battery charging circuit repair.

Key Features

• Manufacturer: Texas Instruments / Benchmarq legacy

• Marking / Short Part Number: 2057W

• Full / Related Part Number: bq2057W, BQ2057WSN, BQ2057WSNTR and related bq2057 variants

• Device Type: Advanced linear charge-management IC

• Product Category: Power Management IC / battery charger IC

• Battery Chemistry: Lithium-Ion and Lithium-Polymer

• Cell Support: Single-cell and two-cell battery pack support depending on exact bq2057 version

• Regulation Voltage: 4.1V / 4.2V or 8.2V / 8.4V preset options depending on device version

• Charge Method: Linear constant-current / constant-voltage charging

• Voltage Regulation Accuracy: Better than ±1% class depending on datasheet condition

• Dropout Voltage: 0.3V class dropout for reduced heat dissipation

• Battery Conditioning: Conditioning charge support for deeply discharged battery packs

• Temperature Monitoring: External thermistor temperature monitoring through TS input

• Charge Termination: Minimum-current charge termination

• Status Output: Charge-status output for LED or host processor interface

• Compensation Feature: AutoComp™ dynamic charge-rate compensation for battery pack internal impedance

• Package Options: 8-pin SOIC and 8-pin TSSOP package variants depending on full ordering code

• Mounting Type: Surface mount

• Key Features: Li-Ion / Li-Polymer charging, single-cell or two-cell support, accurate voltage regulation, battery conditioning, temperature monitoring, charge termination, status indication and compact 8-pin package options

• Typical Use: Portable electronics, handheld devices, battery charger circuits, embedded power boards, rechargeable battery packs and repair applications

• Ordering / Packaging Note: 2057W is usually a shortened marking-style reference for bq2057W variants; buyers should verify the full TI ordering code, package suffix, cell-count version, regulation voltage, top marking, packing format and datasheet revision before production or repair use.

Applications

2057W can be used in electronic systems that require compact linear charge management for Lithium-Ion or Lithium-Polymer battery packs. Typical applications include portable consumer electronics, handheld instruments, rechargeable battery chargers, data terminals, wireless devices, embedded battery-powered systems, backup battery circuits, maintenance projects and legacy charging circuit repair. It is also suitable for BOM review where a Texas Instruments bq2057W family battery charger IC is required.

Quality & Sourcing

Antrex Electronics can support 2057W sourcing with stock availability checks, RFQ quotation, package confirmation, date code review and shipment arrangement. For project-based purchasing, buyers can provide quantity, target price, required date code, packaging requirements and application information for faster quotation support.

For quality control, Antrex Electronics can help arrange product photos, label review, visual inspection and third-party testing support when required. OEMs, EMS providers, repair centers and electronic component buyers are welcome to send BOM lists or hard-to-find part requests for sourcing assistance.