US2076

The US2076 is a dual function IC combining a switching controller and a 7.5A adjustable low dropout regulator all in a compact 7 pin TO220 and TO263 surface mount packages providing a total solution for dual supply processor applications such as an Intel P55C ä, AMD K6ä, as well as Cyrix 6X86Lä and the M2äprocessors. Typically in these applications a dual supply regulator US2076 converts 5V to 3.3V for I/O supply and a jumper programmable supply of 1.25V to 3.5V for CORE supply.The linear regulator portion in the US2076 is an adjustable one that can be programmed to 3.30V output and has a minimum of 7.5A current capability designed to provide ample current for most applications.

The US2076 uses an internal regulator generated from the 12V supply to power the switching controller as well as the 12V supply to drive the power MOSFET, allowing a low cost N channel MOSFET switch to be used. The IC US2076 also includes an error comparator for fast transient response, a precise voltage reference for setting the output voltage as well as a direct drive of the MOSFET for the minimum part count.