BQ2057PDGKR

Overview

The BQ2057PDGKR is a low dropout linear charge management integrated circuit designed for single-cell lithium-ion and lithium-polymer batteries. It operates within a supply voltage range of 4.5 V to 15 V and delivers an output current of 2 A with a regulated charging voltage of 4.2 V. The component is housed in an 8-pin VSSOP package, suitable for surface mount installation. It functions reliably across an operating temperature range from -20 °C to +70 °C.

Feature Summary

• Implements low dropout linear charging architecture for efficient power management
• Supports single-cell lithium-ion and lithium-polymer battery chemistries
• Features programmable constant-current charging capability

Applications

• Portable electronic devices requiring single-cell battery charging
• Consumer electronics utilizing lithium-ion or lithium-polymer power sources
• Compact embedded systems with limited board space

Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm pinout and electrical characteristics. Confirm package dimensions match design requirements. Check for obsolescence status as this variant may be discontinued. Ensure compatibility with existing thermal management solutions.

Selection Notes

Select this component for applications requiring a compact solution for single-cell Li-Ion or Li-Po batteries. Verify that the 2 A output current meets system demands. Ensure the 4.5 V to 15 V input range aligns with available power sources. Consider the VSSOP-8 package constraints for PCB layout.

Part Context

This part belongs to the BQ2057 family of advanced linear charge management ICs from Texas Instruments. The series supports both single and two-cell configurations. Variants differ by cell count support, output voltage, and package type. This specific model targets single-cell applications.

Replacement Considerations

Publicly confirmed substitutes include MCP73843-420I/MS from Microchip Technology.