Packet Digital, LLC


  • 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
  • Dual constant-on-time, voltage feed-forward, synchronous step-down PWM controller
  • Input voltage range: 6.5V to 24V
  • Programmable output voltage supporting DDR2, DDR3, DDR3L, DDR3UL, and LPDDR voltages
  • PWM and light-load operation
  • Temperature compensated RDS(ON) current sensing
  • Internal softstart
  • Output over and under voltage protection
  • Built-in output discharge circuit
  • Power Good output
  • 1.8V linear regulator
  • SMBus compatible programming interface
  • QFN package


The PSG5420 is a highly integrated power management IC with two synchronous step-down controllers designed to supply VDDQ to DDR memory. A programmable interface for monitoring activity in the system, coupled with an advanced On-Demand Power® algorithm, enable the regulated output voltage of the integrated switching regulators 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.


  • DDR2, LPDDR Memory Power Supplies
  • DDR3, DDR3L, DDR3UL Memory Power Supplies
  • GDDR3, GDDR4, and GDDR5 Memory Power Supplies
  • Mobile computers
  • Servers
  • Networking Equipment


  • PSG5420 Datasheet (by request)

Evaluation Kits

  • PSG5420 Evaluation Kit (by request)


PSG5210 schematic

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