General Description

The MAX17080 is a triple-output, step-down, fixed frequency controller for AMD’s serial VID interface (SVI) CPU and northbridge (NB) core supplies. The MAX17080 consists of two high-current SMPSs for the CPU cores and one 3A internal switch SMPS for the NB core. The two CPU core SMPSs run 180° out-of-phase for true interleaved operation, minimizing input capacitance. The 3A internal switch SMPS runs at twice the switching frequency of the core SMPS, reducing the size of the external components.

Features

♦ Dual-Output Fixed-Frequency Core Supply Controller

   Split or Combinable Outputs Detected at Power-Up

   Dynamic Phase Selection Optimizes Active/Sleep Efficiency

   Transient Phase Repeat Reduces Output Capacitance

   True Out-of-Phase Operation Reduces Input Capacitance

   Programmable AC and DC Droop

   Accurate Current Balance and Current Limit

   Integrated Drivers for Large Synchronous Rectifier MOSFETs

   Programmable 100kHz to 600kHz Switching Frequency

   4V to 26V Battery Input Voltage Range

♦ 3A Internal Switch Northbridge SMPS

   2.7V to 5.5V Input Voltage Range

   2x Programmable Switching Frequency

   100mΩ/50mΩ Power Switches

♦ ±0.5 VOUT Accuracy over Line, Load, and Temperature

♦ AMD SVI-Compliant Serial Interface with Switchable Address

♦ 7-Bit On-Board DAC: 0 to +1.550V Output Adjust Range

♦ Integrated Boost Switches

♦ Adjustable Slew-Rate Control

♦ Power-Good (PWRGD) and Thermal-Fault (VRHOT) Outputs

♦ System Power-OK (PGD_IN) Input

♦ Overvoltage, Undervoltage, and Thermal-Fault Protection

♦ Voltage Soft-Startup and Passive Shutdown

♦