LT8210-1

• Built-In Multiphase Current Sharing
  • Leader-Less Design
• Pass-Thru or Fixed Output CCM, DCM Operation
• Programmable Non-Switching Pass-Thru Window
• V_IN Range: 2.8V to 100V (4.5V for Start-Up)
• V_OUT Range: 1V to 100V
• Reverse Input Protection to -40V
• Programmable Current Limit
• No Top MOSFET Refresh Noise in Buck or Boost
• Fixed/Phase-Lockable Frequency: 80kHz to 400kHz
• Available in a 40-Lead (6mm x 6mm) QFN

The evaluation circuit EVAL-LT8210-1-AZ is a high voltage, high efficiency synchronous 4-switch multiphase buck-boost DC/DC converter with pass-thru mode. This circuit provides an output of 36V to 56V and can supply a maximum load current of 20A with an input voltage range of 26V to 80V. The evaluation circuit features four LT8210-1 controllers that operate in multiphase configuration, and the leaderless closed loop current sharing loop balances the current per phase.

The EVAL-LT8210-1-AZ can be operated in three modes: continuous conduction mode (CCM), discontinuous conduction mode (DCM), and pass-thru mode. Use MODE1 and MODE2 header pins to select the desired mode. The board operates at a switching frequency of 205kHz and is synchronized externally. All components on the board are selected to optimize efficiency at this frequency. Reverse input protection to –40V is also implemented on this circuit board.

The LT8210-1 data sheet gives a complete description of the part, operation, and applications information. The data sheet must be read in conjunction with this user guide.

Design files for this circuit board are available.