TPS54202: Short between VIN and GND develops after 10-20min use

Tool/software:

I've been trying to replace an LM317 linear regulator with the TPS54202 in a circuit that takes 24V and powers a 7.5V, 0.9A lamp. I originally had to step the 24V down to 12V with a fixed-output DC-DC regulator; the 12V then supplied the LM317.

I wired it up on a breadboard with a SOT23 breakout board according to the datasheet, trying to keep the layout as tight as possible. Schematic and breadboard layout below (connection to lamp not shown):

I've been able to get the circuit to work briefly with three ICs I tried, but after 10-20 minutes, each IC developed a short between the VIN and GND pins. I verified this by removing the ICs from the breadboard and checking continuity. 

Also, does the chip really not need a reverse-biased Schottky diode? Similar regulators I found from other vendors seem to require one.

Thanks, everyone!