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LTC4070 - Li-Ion/Polymer Shunt Battery Charger

General Description

The LTC®4070 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.

Key Features

  • n Low Operating Current (450nA) n 1% Float Voltage Accuracy Over Full Temperature and Shunt Current Range n 50mA Maximum Internal Shunt Current (500mA with External PFET) n Pin Selectable Float Voltage Options: 4.0V, 4.1V, 4.2V n Ultralow Power Pulsed NTC Float Conditioning for Li-Ion/Polymer Protection n Suitable for Intermittent, Continuous and Very Low Power Charging Sources n Low and High Battery Status Outputs n Simple Low Voltage Load Disconnect.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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FEATURES n Low Operating Current (450nA) n 1% Float Voltage Accuracy Over Full Temperature and Shunt Current Range n 50mA Maximum Internal Shunt Current (500mA with External PFET) n Pin Selectable Float Voltage Options: 4.0V, 4.1V, 4.2V n Ultralow Power Pulsed NTC Float Conditioning for Li-Ion/Polymer Protection n Suitable for Intermittent, Continuous and Very Low Power Charging Sources n Low and High Battery Status Outputs n Simple Low Voltage Load Disconnect Application n Thermally Enhanced, Low Profile (0.