LTC4070IDDB#PBF Description
The LTC4070IDDB#PBF allows simple charging of Li-Ion/Polymer batteries from very low current, intermittent, or continuous charging sources. The 450nA to 50mA operating current makes charging possible from previously unusable sources. With the addition of an external pass device, the shunt current may be boosted to 500mA. Stacked cell high-voltage battery packs are inherently balanced with shunt charging. With its low operating current, the LTC4070IDDB#PBF is well suited to charge thin film batteries in energy harvesting applications where charging sources may be intermittent or very low power.
LTC4070IDDB#PBF Features
Low Operating Current (450nA)
1% Float Voltage Accuracy Over Full Temperature and Shunt Current Range
50mA Maximum Internal Shunt Current (500mA with External PFET)
Pin Selectable Float Voltage Options: 4.0V, 4.1V, 4.2V
Ultralow Power Pulsed NTC Float Conditioning for Li-Ion/Polymer Protection
Suitable for Intermittent, Continuous, and Very Low Power Charging Sources
Low and High Battery Status Outputs
Simple Low Voltage Load Disconnect Application
Thermally Enhanced, Low Profile (0.75mm) 8-Lead (2mm × 3mm) DFN and MSOP Packages
LTC4070IDDB#PBF Applications
Low Power Li-Ion/Polymer Battery Back-Up
Solar Power Systems with Back-Up
Memory Back-Up
Embedded Automotive
Thin Film Batteries
Energy Scavenging/Harvesting
