LT8705EFE#PBF

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1. Description

The LT®8705 is a high performance buck-boost switching regulator controller that operates from input voltages above, below or equal to the output voltage. The part has integrated input current, input voltage, output current and output voltage feedback loops. With a wide 2.8V to 80V input and 1.3V to 80V output range, the LT8705 is compatible with most solar, automotive, telecom and battery-powered systems. TheLT8705includes servopins toindicatewhichfeedback loops are active. TheMODEpinselects amongBurstMode® operation, discontinuous or continuous conduction mode at light loads. Additional features include a 3.3V/12mA LDO, a synchronizable fixed operating frequency, onboard gate drivers, adjustable UVLO, along with input and output current monitoring with programmable maximum levels.

2. Features

    1. Single Inductor Allows VIN Above, Below, or Equal to Regulated VOUT

    2. VIN Range 2.8V (Need EXTVCC > 6.4V) to 80V

    3. VOUT Range: 1.3V to 80V

    4. Quad N-Channel MOSFET Gate Drivers

    5. Synchronous Rectification: Up to 98% Efficiency

    6. Input and Output Current Monitor Pins

    7. Synchronizable Fixed Frequency: 100kHz to 400kHz

    8. Integrated Input Current, Input Voltage, Output Current and Output Voltage Feedback Loops

    9. Clock Output Usable To Monitor Die Temperature

  10. Available in 38-Lead (5mm × 7mm) QFN and TSSOP Packages with the TSSOP Modified for Improved High Voltage Operation

3. Applications

    1. High Voltage Buck-Boost Converters

    2. Input or Output Current Limited Converters

4. Pin Configuration