Dear Ella -
Thanks for the post. The TMP75C and the competitive variants you listed are digital temperature sensors, which use I2C for communication.
The smallest size I2C part we have is the TMP114. Here is a comparison chart between the two. (click on image to enlarge)
If you want to browse digital parts by size (smallest first), please see this link: https://www.ti.com/sensors/temperature-sensors/digital/products.html#sort=p1811;asc
If you truly need an analog sensor, please see this link: https://www.ti.com/sensors/temperature-sensors/analog/products.html#sort=p1811;asc
