IRU3055

Data Sheet No. PD94262 IRU3055 5-BIT PROGRAMMABLE 3-PHASE SYNCHRONOUS BUCK CONTROLLER IC PRELIMINARY DATA SHEET TEST SPEC FEATURES DESCRIPTION Meets VRM 9.0 Specification 3-Phase Controller with On-Board MOSFET Driver On-Board DAC programs the output voltage from 1.075V to 1.850V Loss-less Short Circuit Protection Programmable Frequency Synchronous operation allows maximum efficiency Minimum Part Count Soft-Start Power Good Function Hiccup Mode Current Limit APPLICATIONS The IRU3055 is a 3-phase synchronous Buck controller which provides high performance DC to DC converter for high current applications. The IRU3055 controller IC is specifically designed to meet Intel and AMD specifications for the new microprocessor requiring low voltage and high current. The IRU3055 features under-voltage lockout for both 5V and 12V supplies, an external and programmable softstart function as well as programming the oscillator frequency by using an external resistor. Intel Pentium 4 and AMD K7...