The TPS73533DRVT from Texas Instruments is a fixed positive linear voltage regulator Integrated Circuit with 1 output rated at 3.3 V and 500 mA, in a 6-WSON (2x2) package.
The TPS73533DRBR from Texas Instruments is a positive fixed linear voltage regulator Integrated Circuit with 1 output at 3.3 V and 500 mA, in an 8-SON (3x3) package.
The TPS73533DRBT from Texas Instruments is a linear voltage regulator Integrated Circuit with a fixed positive 3.3 V output rated 500 mA, in an 8-SON package.
The TPS73533QDRBRQ1 from Texas Instruments is a positive fixed linear voltage regulator Integrated Circuit with 1 output rated 3.3 V and 500 mA, in an 8-SON (3x3) package.