EVAL-LTM4638-AZ

Product Details

The EVAL-LTM4638-AZ evaluation board is a power supply generating 1V, 60A (max) from a 3.1V to 20V input. It is a quad PolyPhase® solution featuring the LTM®4638, a high-performance and high-efficiency step-down regulator. The LTM4638 is a complete DC-to-DC point-of-load (POL) regulator in a thermally enhanced 6.25mm × 6.25mm × 5.02mm BGA package.

The EVAL-LTM4638-AZ is optimized using a default frequency of 600kHz, and the current mode control architecture allows easy current sharing. The LTM4638 operates in continuous-conduction mode (CCM) by default but can be placed in pulse-skipping mode (PSM) to optimize efficiency at light loads.

An external clock IC, LTC6902, is included in the EVAL-LTM4638-AZ and is used to provide clock synchronization signals to interleave the four channels 90° out-of-phase for reduced root mean square (RMS) input current ripple and output voltage ripple. The LT3088 is also included in this solution to power the clock IC.

The LTM4638 data sheet gives a complete description of the device, including operation and application information. The data sheet must be read in conjunction with this evaluation board user guide prior to working on or modifying the EVAL-LTM4638-AZ.