General Description
The MAX767 is a high-efficiency, synchronous buck controller IC dedicated to converting a fixed 5V supply into a tightly regulated 3.3V output. Two key features set this device apart from similar, low-voltage step-down switching regulators: high operating frequency and all N-channel construction in the application circuit. The 300kHz operating frequency results in very small, lowcost external surface-mount components.

Features
♦ >90% Efficiency
♦ 700µA Quiescent Supply Current
♦ 120µA Standby Supply Current
♦ 4.5V-to-5.5V Input Range
♦ Low-Cost Application Circuit
♦ All N-Channel Switches
♦ Small External Components
♦ Tiny Shrink-Small-Outline Package (SSOP)
♦ Predesigned Applications:
   Standard 5V to 3.3V DC-DC Converters up to 10A
   High-Accuracy Pentium P54C VR-Spec Supply
♦ Fixed Output Voltages Available:
   3.3V (Standard)
   3.45V (High-Speed Pentium™)
   3.6V (PowerPC™)

Applications
   Local 5V-to-3.3V DC-DC Conversion
   Microprocessor Daughterboards
   Power Supplies up to 10A or More