onsemi RCB001-12A

The RCB001 VRM module is a programmable DC-DC voltage regulator module designed to deliver the selectable processor core voltage required by the Pentium Pro microprocessor family. This VRM module provides the flexibility to board designers to support the entire Pentium Pro processor family with a single motherboard design. The RCB001 design takes full advantage of a proprietary programmable DC-DC voltage controller IC which integrates the DAC function as well as the Power Good and Output Enable features. The result is a voltage regulator module that uses a minimum number of external components to achieve high reliability at a competitive cost. The RCB001 provides an extremely well regulated voltage selectable from 2.0V to 3.5V. Voltage selection is accomplished through a 4 bit digital input (VID0 - VID3) and can be incremented in 100mV steps. The Power Good open collector output provides a logic LOW state when an out-of-tolerance voltage is detected at the VRM output. Other features include high efficiency, short circuit protection, output enable and low package weight. The RCB001 VRM module is designed as a point-of-load converter for the Pentium Pro processor, thus minimizing the distribution losses normally occuring when drawing high currents from a centralized power supply.

• Programmable 2.0V to 3.5V output from 5V supply
• Maximum output current 12.4A
• Typical Efficiency >84%
• Total output accuracy typically ±3%
• Short circuit protection
• Power Good output
• Output Enable function
• Excellent transient response
• Meets Intel Pentium Pro VRM specifications

• Pentium Pro motherboard VRM module
• Programmable power supply module
• Template for motherboard implementation