Switching, DC-DC Regulator, Controller - UC3870 and elements with same datasheet

UC3870 - Switching, DC-DC Regulator, Controller

Possible substitute or elements with same package in depends of Datasheet 1

UC1870	Switching, DC-DC Regulator, Controller
UC2870	Switching, DC-DC Regulator, Controller
UC3870	Switching, DC-DC Regulator, Controller