The LM20145 demonstration board has been designed to balance overall solution size with the efficiency of the regulator. The demonstration board measures just 1.0" x 1.0" on a two layer PCB, with all components placed on the top layer. The power stage and compensation components of the LM20145 demonstration board have been optimized for an input voltage of 5V, but for testing purposes, the input can be varied across the entire operating range. The output voltage of the evaluation board is nominally 2.5V. The control loop compensation of the LM20145 demonstration board has been designed to provide a stable solution over the entire input and output voltage range with a reasonable transient response. The EN pin is connected to VIN through a 100kOhm resistor which will enable the device when power is applied.
Inputs Outputs #1 VinMin=2.95V Vout1=2.5V VinMax=5.5V Iout1=5A Optimized for 5V to 2.5V conversion 5A output current, 89% efficiency 1.5%output voltage accuracy 500 kHz switching frequency Peak current mode control Starts up into pre-biased loads Soft-Start set by external capacitor Precision enable pin with hysteresis Integrated OVP, UVLO, power good and thermal shutdown Accurate current limit with frequency foldback Input voltage range 2.95V to 5.5V Applications Simple to design, high efficiency point of load regulation from a 5V or 3.3V bus High Performance DSPs, FPGAs, ASICs and microprocessors Broadband, Networking and Optical Communications Infrastructure