LM3420AM5X-4.2

Battery Chargers Overview

The LM3420AM5X-4.2 is a lithium-ion battery charge controller manufactured by Texas Instruments. It operates within an input voltage range of 4.2 V to 42 V and delivers a maximum output current of 600 mA. The device features a fixed 5 V output and maintains a low quiescent current of 24 uA. It functions as a synchronous step-down converter with a switching frequency of 2.1 MHz. The component supports shutdown functionality and is qualified under AEC-Q100 standards for automotive applications. It operates reliably across a temperature range from -40 C to +125 C.

Battery Chargers Feature Summary

• Integrated high-precision current control for accurate charging profiles
• Ultra-small synchronous step-down topology for compact board space
• Automotive qualification ensuring reliability in harsh environments

Battery Chargers Applications

• Lithium-ion battery charging systems
• Automotive electronic modules
• Portable consumer devices requiring small form factors

Battery Chargers Procurement Notes

Verify the specific suffix 'AM5X' against the manufacturer's official datasheet to confirm package type and temperature grade. Ensure the ordering part number matches the required RoHS compliance status. Cross-reference the AEC-Q100 qualification level if the application demands automotive-grade certification. Confirm the reel or cut tape packaging format aligns with assembly line requirements before finalizing the purchase order.

Battery Chargers Selection Notes

Select this component when designing circuits that require a dedicated lithium-ion charge controller with integrated power stage capabilities. The fixed 4.2 V saturation voltage makes it suitable for single-cell applications. Consider the SOT-23-5 package constraints for thermal management. Evaluate the 24 uA quiescent current impact on standby power consumption in battery-operated systems compared to higher efficiency alternatives.

Battery Chargers Part Context

This device belongs to the LM3420 series of battery chargers from Texas Instruments. It is distinct from the LMR34206 series, which are general-purpose DC-DC converters without integrated battery charging algorithms. The LM3420AM5X-4.2 specifically targets single-cell lithium-ion chemistry management within a miniature footprint.

Battery Chargers Replacement Considerations

Public confirmed substitute part numbers include LM3420M5X-8.2 and LM3420AM5X-8.2. Verify pin compatibility and voltage specifications before substitution.