The LT®8210-1 is a 4-switch synchronous buck-boost DC/DC controller that can operate in pass-thru mode, forced continuous conduction, or pulse-skipping mode. Pass-Thru is a feature that passes the input directly to the output when the input is within a user programmable window. Pass-Thru mode eliminates switching losses and EMI while maximizing efficiency. For input voltages above or below the pass-thru window, the buck or boost regulation loops maintain the output at the set maximum or minimum values, respectively. The LT8210-1 is pin compatible with the LT8210. The IMON pin on the LT8210-1 has an ISHARE function, which allows for masterless current sharing. Multiple LT8210-1 can be connected in parallel for higher output current and reduced voltage ripple. A masterless closed loop current sharing loop balances the current per phase and allows phase shedding. Optional reverse input protection down to -40V can be implemented with the addition of a single N-channel MOSFET. The LT8210-1 includes a precision current sense amplifier that can accurately monitor and limit output or input average current. APPLICATIONS * Industrial, Telecom, * Avionics Systems * Automotive * Qualification in Progress * Built-In Multiphase Current Sharing * 18μA Pass-Thru Mode IQ with 99.9% Efficiency * Pass-Thru or Fixed Output CCM, DCM Operation * Programmable Non-Switching Pass-Thru Window * VIN Range: 2.8V to 100V (4.5V for Start-Up) * VOUT Range: 1V to 100V * Reverse Input Protection to -40V * ±2% Output Voltage Accuracy (–40°C to 125°C) * Programmable Current Limit