The Texas Instruments TPS5420DR is an adjustable 2A step-down DC/DC switching regulator. It operates with an input voltage range of 5.5V to 36V and features a fixed 500kHz switching frequency.
The Texas Instruments TPS5420D is a 2A step-down DC/DC switching regulator. It features a wide input voltage range from 5.5V to 36V and an adjustable output voltage.