The Maxim 17480 controller is designed for CPU core and northbridge (NB) power supplies in AMD systems with a serial VID interface (SVI). It includes two high-current SMPSs for the CPU cores and one SMPS with an internal 4 A switch for the NB core. The two CPU SMPSs operate 180° out of phase, while the NB SMPS operates at twice the switching frequency.

Output voltages are dynamically adjusted through a two-wire SVI bus, with each SMPS adjustable independently. The controller supports controlled transitions between VID codes, soft-start, and a low-power pulse-skipping mode. It includes overvoltage, undervoltage, and overtemperature protection, as well as a VRHOT thermal fault output with a programmable threshold using a thermistor temperature sensor. Differential current sensing improves the accuracy of current limiting and the load-line characteristic.

• Compatibility: AMD SVI
• Outputs: 3
• CPU core power supplies: 2 high-current SMPSs
• NB core power supply: 1 SMPS with an internal 4 A switch
• CPU SMPS switching frequency: 100–600 kHz
• NB SMPS switching frequency: Twice that of the CPU SMPSs
• VID interface: Two-wire SVI
• Protection: Overvoltage, undervoltage, and overtemperature
• Temperature sensor: Thermistor
• Thermal fault output: Programmable VRHOT
• Current sensing: Differential