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