100V V and V Synchronous 4-Switch Multiphase Buck-Boost DC/DC Controller

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