3 A buck regulator with a 60 V input ceiling
The Texas Instruments LM2576HVS-ADJ/NOPB is a SIMPLE SWITCHER® series step-down (buck) regulator delivering 3 A continuous output from a 4 V to 60 V input rail. The adjustable output version sets the regulation point with an external resistor divider from a 1.23 V reference.
52 kHz switching — inductor sizing and EMI
The fixed 52 kHz switching frequency is low by modern standards, which means the inductor must be sized for a larger volt-second product — expect a 100 µH to 330 µH shielded inductor for a 3 A design. The trade-off is lower switching losses and a cleaner fundamental EMI peak that stays below 150 kHz, easing conducted-emission filtering in CISPR 25 and EN 55022 environments.
DDPAK/TO-263-5 — surface-mount with a thermal tab
The DDPAK/TO-263-5 (D²Pak) package is a surface-mount variant of the TO-220 with an exposed copper tab on the bottom.