Packet Digital, LLC

Features

  • Multi-phase, constant-on-time, voltage feed-forward synchronous step-down PWM controller supporting two-phase or three-phase operation
  • Configurable On-Demand Power® algorithm to adaptively scale regulated output voltage in correlation with monitored system activity
  • System sensory interfaces to monitor activity and demand for regulated voltage domains
  • Automatic phase current balancing
  • Input voltage range: 12V ±10%
  • Differential remote voltage sensing
  • Programmable output voltage supporting DDR2, DDR3, DDR3L, DDR3UL, and LPDDR voltages
  • Light-load discontinuous conduction mode
  • Temperature compensated inductor DCR current sensing
  • Internal softstart
  • Output over and under voltage protection
  • Power Good output
  • 1.8V linear regulator
  • SMBus compatible programming interface
  • QFN package

Description

The PSG5413 is a highly integrated power management IC with a three-phase synchronous step-down controller designed to supply VDDQ to DDR memory. A programmable interface for monitoring activity in the system, coupled with an advanced On-Demand PowerŪ algorithm, enable the regulated output voltage of the integrated switching regulator to be adaptively scaled in correlation with actual system demand. The real-time tracking of supply voltage to system activity enables maximum system power savings by minimizing the power spent on maintaining worst-case headroom in the power distribution network.

The constant-on-time architecture of the PSG5413 does not require external compensation, reducing external components and simplifying design. Furthermore, a light-load discontinuous conduction mode is user-selectable for high efficiencies at light loads.

Applications

  • DDR3, DDR3L, DDR3UL Memory Power Supplies
  • GDDR3, GDDR4, and GDDR5 Memory Power Supplies
  • Servers

Datasheets

  • PSG5413 Datasheet (by request)

Evaluation Kits

  • PSG5413 Evaluation Kit (by request)

Schematic

PSG5413 schematic

Purchasing and Support

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