LT8708

LT8708 80V Synchronous 4-Switch Buck-Boost DC/DC Controller with Bidirectional Capability FEATURES n Single Inductor Allows VIN Above, Below, or Equal to VOUT n Six Independent Forms of Regulation n VIN Current (Forward and Reverse) n VOUT Current (Forward and Reverse) n VIN and VOUT Voltage n Forward and Reverse Discontinuous Conduction Mode Supported n Supports MODE and DIR Pin Changes While Switching n VINCHIP Range 2.8V (Need EXTVCC > 6.4V) to 80V n VOUT Range: 1.3V to 80V n Synchronous Rectification: Up to 99% Efficiency n Available in 40-Lead (5mm × 8mm) QFN with High Voltage Pin Spacing and 64-Lead (10mm × 10mm) eLQFP n AEC-Q100 Qualified for Automotive Applications APPLICATIONS n High Voltage Buck-Boost Converters n Bidirectional Charging System n Automotive 48V Systems DESCRIPTION The LT®8708 is a high performance buck-boost switching regulator controller that operates from an input voltage that can be above, below or equal to the output voltage. Features are included to simplify bidirectional power conversion in battery/capacitor backup systems and other applications that may need regulation of VOUT, VIN, IOUT, and/or IIN. Forward and reverse current can be monitored and limited for the input and output sides of the converter. All four current limits (forward input, reverse input, forward output and reverse output) can be set independently using four resistors on the PCB. The MODE pin can select between discontinuous conduction mode (DCM), continuous conduction mo...