BQ2057PDGK

Overview

The BQ2057PDGK is a single-cell lithium-ion or lithium-polymer battery charger integrated circuit manufactured by Texas Instruments. It utilizes an 8-VSSOP surface-mount package and supports a maximum supply voltage of 15V. The device provides a regulated charging voltage of 4.1V for the connected battery cell. Charging current is implemented as a programmable constant current feature, allowing customization based on specific application requirements. The component operates within a temperature range of -20°C to +70°C.

Feature Summary

• Supports charging for single-cell lithium-ion and lithium-polymer batteries
• Features programmable constant current charging capability
• Integrates low dropout linear charge management architecture

Applications

• Portable electronic devices requiring single-cell power management
• Battery-powered consumer electronics
• Industrial control systems with limited space constraints

Procurement Notes

This component has been officially discontinued and is no longer in production by Texas Instruments. Verification of availability should focus on surplus distributors or authorized secondary market sources rather than direct manufacturer allocation. Buyers must confirm the authenticity of stock from non-original channels due to the end-of-life status. Cross-referencing datasheet revisions and marking details is essential to ensure compatibility with existing designs before procurement.

Selection Notes

Designers should evaluate alternative components immediately given the discontinuation status. Selection criteria must prioritize compatible pinouts, electrical specifications, and thermal performance to ensure seamless integration into existing layouts. Reviewing official replacement recommendations from the manufacturer is critical to maintain system reliability and avoid supply chain disruptions associated with obsolete parts.

Part Context

The BQ2057PDGK belongs to the BQ2057 family of battery chargers from Texas Instruments. This series focuses on providing efficient linear charging solutions for portable applications. The PDGK suffix specifically denotes the 8-VSSOP package variant, distinguishing it from other form factors within the same functional family designed for similar single-cell management tasks.

Replacement Considerations

Publicly confirmed substitute part numbers include MCP73843-420I/MS from Microchip Technology. Designers should verify pinout compatibility and electrical parameter alignment when transitioning to this alternative to ensure proper functionality in the target application.