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LTC3643 - 2A Bidirectional Power Backup Supply

General Description

The LTC®3643 is a bidirectional synchronous stepup charger and step-down converter which efficiently charges a capacitor array up to 40V from an input supply between 3V to 17V.

Key Features

  • nn Bidirectional Synchronous Boost Capacitor Charger/Buck Regulator for System Backup nn Wide Input Voltage Range: 3V to 17V nn Up to 40V Capacitor Voltage Storage for High Energy Backup nn 2A Maximum CAP Charge Current nn Integrated Power N-Channel MOSFETs (150mΩ Top and 75mΩ Bottom) nn Integrated Power N-Channel MOSFET for Output/CAP Disconnect (50mΩ) nn Input Current Limit During Charging nn Fast 1MHz Switching Frequency nn ±1% Reference Accuracy for System Voltage Regulation nn Indicator Out.

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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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LTC3643 2A Bidirectional Power Backup Supply FEATURES nn Bidirectional Synchronous Boost Capacitor Charger/Buck Regulator for System Backup nn Wide Input Voltage Range: 3V to 17V nn Up to 40V Capacitor Voltage Storage for High Energy Backup nn 2A Maximum CAP Charge Current nn Integrated Power N-Channel MOSFETs (150mΩ Top and 75mΩ Bottom) nn Integrated Power N-Channel MOSFET for Output/CAP Disconnect (50mΩ) nn Input Current Limit During Charging nn Fast 1MHz Switching Frequency nn ±1% Reference Accuracy for System Voltage Regulation nn Indicator Outputs for Charge Status and Input Power Fail nn Low Profile 24-lead 3mm × 5mm QFN Package APPLICATIONS nn Backup Capacitor Systems nn Power Failure Backup Systems nn Solid-State Drives DESCRIPTION The LTC®3643 is a bidirectional synchronous step