TPS54239 до 23 В. Ещё CS51411/3 - их везде как грязи, но 1.5А (pin−compatible with the LT1375). Ещё AMS4154 (2A, 32V), но доставабельность по efind.ru от недели http://www.advanced-monolithic.com/pdf/ds4154.pdf
http://www.onsemi.com/pub_link/Collateral/CS51411-D.PDF
http://www.techcod …m/datasheet/TD1410.pdf 2A 380KHz 20V
http://www.techcod …m/datasheet/TD2786.pdf 3A 30V 340KHz
http://www.techcod …m/datasheet/TD3112.pdf 2.2A 380KHz 32V
http://www.techcod …m/datasheet/TD1583.pdf 3A 380KHz 28V
http://www.techcod …m/datasheet/TD1591.pdf 2A 380KHz 32V
http://diodes.com/datasheets/AP3202.pdf
http://diodes.com/datasheets/AP3502F.pdf
http://diodes.com/datasheets/AP6503.pdf
http://www.diodes. …/datasheets/AP3005.pdf
https://www.monoli …ent/GetDocument?id=246 (MP1591 2A, 32V, 330KHz)
https://www.monoli …ent/GetDocument?id=598 (MP2403 3A, 32V, 250kHz)
https://www.monoli …ent/GetDocument?id=362 (MP28373 3A, 28V, 1.4MHz)
https://www.monoli …ent/GetDocument?id=578 (MP2303A 3A, 28V, 360kHz)
https://www.monoli …ent/GetDocument?id=293 (MP2372 3A, 28V, 925kHz)
https://www.monoli …ent/GetDocument?id=281 (MP2363 3A, 27V, 365KHz)
https://www.monoli …ent/GetDocument?id=235 (MP1580 2A, 25V, 380 KHz)
https://www.monoli …nt/GetDocument?id=1789 (MP2305S 2A, 23V)
https://www.monoli …ent/GetDocument?id=583 (MP2307 3A, 23V, 340KHz)
https://www.monoli …ent/GetDocument?id=266 (MP2358 2A, 23V, 370KHz)
https://www.monoli …ent/GetDocument?id=238 (MP1583 3A, 23V, 385KHz)
https://www.monoli …ent/GetDocument?id=663 (MP29296 2A, 23V, 340KHz)