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LM2596SX-ADJ DC-DC Switching Regulator, 40V In, 7.5A Out, PSSO5
Automotive Switching Regulator IC, 40V In, 9.5A, 200kHz, TO-263

5A Step-Down DC/DC Controller, 40V In, Adj/Fixed Out, 260kHz, VSON

Adjustable Flyback Boost Regulator, 4-40V In, 5A Out, 115kHz, TO-263