MAX1736EUT42+T

The MAX1736EUT42+T is a single-cell Li+ battery charger for current limited supply in 6 pin SOT-23 package. It provides simple, safe, low cost method of charging single-cell Li+ battery with nearly no heat generation. Combined with current limited voltage source IC provides precharge, fast-charge and top-off-charge capabilities. After constant current fast charge, top-off safely finishes charging battery by pulse width modulating charge current. The top-off on-time is kept below electrochemical time constant of cell. The key advantage of this method is charge circuit is small and generates minimal heat while providing a safe method of charging to ensure maximum cell life. It initiates charging in one of four ways, battery insertion, charger power-up, battery voltage threshold and by external manipulation of the EN pin. It is used in single-cell Li+ portable applications, wireless handsets, personal digital assistants, digital cameras, self-charging battery packs and cradle chargers.

• Input voltage range is 4.7V to 22V
• Operating temperature range from -40°C to 85°C
• Stand-alone or µP-controlled operation
• 0.5% voltage set-point accuracy
• Lowest power dissipation
• Low 4.7V min input voltage
• Top-off charging to achieve full battery capacity
• No inductor required
• Safely pre-charges near dead cells
• Automatic power down when input power removed

Applications

Power Management, Portable Devices

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party