LTC3643 Datasheet | Linear Technology

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 stepup charger and step-down converter which efficiently charges a capacitor array up to 40V from an input supply between 3V to 17V. When the input supply falls below the programmable power-fail...