The LM3420AM5X-8.4 from Texas Instruments is a highly advanced and efficient lithium-ion and lithium-polymer battery charge controller that is designed to offer optimal performance and reliability.

• Type: fixed output, constant voltage lithium-ion battery charge controller
• Designed to provide: precise charge control for single-cell lithium-ion or lithium-polymer batteries
• Input Voltage Range: from 2.5V to 24V.
• Output Voltage: 8.4V output voltage with a tolerance of ±1%
• Built-in Temperature Range: from -40°C to 85°C
• Package: small SOT-23 package
• Features: internal current limiting and thermal shutdown capabilities