RC5031

The RC5031 is a high power, switch-mode DC-DC controller that provides an accurate, adjustable output for high-end microprocessors requiring unique supply voltages. The RC503l has built-in Soft Start feature which offers system protection during power-up by reducing both inrush current and output overshoot. When combined with the appropriate external circuitry, the RC5031 can deliver load currents as high as 13A at efficiencies as high as 88%. Through the use of external resistors, the RC503l can generate output voltages from 1.5V up to 3.6V. The RC503l is designed to operate in a "constant on-time,' (patent pending) control mode under all load conditions. Its accurate low TC reference eliminates the need for precision external components in order to achieve the tight tolerance voltage regulation required by most CPU-based applications. Short circuit current protection is provided through the use of a current sense resistor, while overvoltage protection is provided internally. The RC5031 is a highly efficient switched-mode DC-DC converter that can select a 3.5V or user-adjustable output. With the appropriate external components, the RC5031 can be configured to implement a switchable power supply system for Pentium and K6 processors.

The features of RC5031 can be summarized as (1)high power switched-mode DC-DC controller can source in excess of 13A; (2)output voltage adjustable from 1.5V to 3.6V; (3)85% efficiency; (4)cumulative accuracy 3% over line, load, temperature and transient variations; (5)overvoltage and short circuit protection; (6)built-in soft start.

The absolute maximum ratings (note1) of RC5031 are (1)supply voltage, VCCA, VCCP: 13V; (2)storage temperature: -65°C to 150°C; (3)junction temperature: 150°C; (4)lead soldering temperature, 10 seconds: 300°C(note1: functional operation under any of these conditions is not implied. performance is guarenteed only if operating conditions are not exceeded).