DESCRIPTION

The US3033 IC combines a switching controller and a linear regulator controller all in a compact 8 pin surface mount package, providing a total solution for dual supply processor applications such as an Intel P55C ™, AMD K6™, as well as Cyrix 6X86L™ and the M2™ processors.

FEATURES

■ LDO Controller allows the use of a low cost

pass transistor for the I/O supply

■ 8 pin SOIC combines switching and linear

controller

■ Internal Pre-regulator Eliminates Cross talk

between Switching & Linear regulators

■ Automatic shut down of the linear regulator

when connected to the Vcc2 Det pin

■ On board MOSFET driver

■ Fastest transient response of any controller

method. ( 0 to 100 Duty Cycle in 100 nS )

■ 1 internal voltage reference

■ Internal Under Voltage Lockout protects

MOSFET during start-up

APPLICATIONS

■ Dual supply low voltage processor applications,

such as: P55C™,CYRIX M2™, POWER PC™ and

AMD K6™

■ Simple 5V to 3.3V switcher for Pentium with AGP

or Pentium II™ applications