LM3420M5-4.2

Battery Chargers Overview

The LM3420M5-4.2 is a single-cell lithium-ion battery charger integrated circuit manufactured by Texas Instruments. It utilizes a constant-current/constant-voltage (CC/CV) charging algorithm suitable for portable applications. The device operates from an input voltage range of 4.75 V to 18 V and supports charge currents up to 1 A. It features a compact SOT-23-5 package, integrating power MOSFETs to minimize external component count. The IC includes thermal regulation and automatic recharge functions.

Battery Chargers Feature Summary

• Integrates power MOSFETs to reduce external component requirements
• Supports constant-current and constant-voltage charging profiles
• Includes thermal regulation to manage junction temperature
• Features automatic recharge capability when voltage drops below threshold

Battery Chargers Applications

• Portable electronic devices requiring single-cell lithium-ion battery management
• Handheld instruments with limited board space constraints
• Consumer electronics utilizing SOT-23-5 packaged solutions

Battery Chargers Procurement Notes

Verify the specific suffix M5-4.2 against current datasheets as availability may vary. Confirm package type SOT-23-5 compatibility with PCB footprint. Check for obsolescence status or lifecycle changes directly with Texas Instruments or authorized distributors before finalizing design-in decisions.

Battery Chargers Selection Notes

Select this component for designs requiring a compact, integrated solution for single-cell Li-ion charging. Ensure input supply voltage falls within the 4.75 V to 18 V range. Evaluate thermal performance requirements given the small package size and potential for high current operation up to 1 A in confined spaces.

Battery Chargers Part Context

This part belongs to the LM3420 family of battery chargers from Texas Instruments. It is designed specifically for single-cell lithium-ion batteries. The device simplifies charger design by integrating necessary power switches and control logic into a small outline transistor package.

Battery Chargers Replacement Considerations

Consult official substitution guides for pin-compatible alternatives. Verify electrical parameters such as input voltage range and maximum charge current match application requirements when considering cross-references.