LM20125EVAL: 1.2V @ 5A, 2.95 ~ 5.5V in

The LM20125 is a full featured buck switching regulator capable of driving up to 5A of load current. The nominal 500 kHz switching frequency of the LM20125 reduces the size of the power stage components while still allowing for highly efficient operation. The LM20125 is capable of converting an input voltage between 2.95V and 5.5V down to an output voltage as low as 0.8V.

Fault protection features include cycle-by-cycle current limit, output power good, and output over-voltage protection. The dual function soft-start/tracking pin can be used to control the startup response of the LM20125, and the precision enable pin can be used to easily sequence the LM20125 in applications with sequencing requirements.

The LM20125 evaluation board has been designed to balance overall solution size with the efficiency of the regulator. The evaluation board measures just under 1.3” x 1.1” on a two layer PCB, with all components placed on the top layer.

The output voltage of the evaluation board is nominally 1.2V, but this voltage can be easily changed by replacing one of the feedback resistors (RFB1 or RFB2).