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LTC4070 Datasheet Li-Ion/Polymer Shunt Battery Charger

Manufacturer: Linear Technology (now Analog Devices)

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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.

With the addition of an external pass device, shunt current may be boosted to 500mA.

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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