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MIC5164 Dual Regulator

Dual Regulator Controller for DDR3 GDDR3/4/5 Memory and High-Speed Bus Termination

Micrel - MIC5164 Dual RegulatorMicrel, Inc.'s MIC5164 is a dual regulator controller designed for high-speed bus termination. It offers a simple, low-cost JEDEC-compliant solution for terminating high-speed, low-voltage digital buses (i.e. DDR, DDR2, DDR3, SCSI, GTL, SSTL, HSTL, LV-TTL, Rambus, LV-PECL, LV-ECL, etc.) with a power good (PG) signal.

The MIC5164 controls two external N-Channel MOSFETs to form two separate regulators. It operates by switching between either the high-side MOSFET or the low-side MOSFET, depending on whether the current is being sourced to the load or sunk by the regulator. Designed to provide a universal solution for bus termination regardless of input voltage, output voltage, or load current, the desired MIC5164 output voltage can be programmed by forcing the reference voltage externally to the desired voltage.

The MIC5164 operates from an input of 1.35V to 6V with a second bias supply input required for operation. It is available in the tiny MSOP-10 package with an operating junction temperature range of -40°C to +125°C.

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  • Applications
  • Diagram
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  • JEDEC-compliant bus termination for:
    • SCSI, GTL, SSTL, HSTL, LV-TTL, Rambus, LV-PECL, LV-ECL, etc.
  • Input voltage range: 1.35V to 6V
  • DDR, DDR2, DDR3, memory terminationRoHS Compliant
  • Tracking programmable output
  • Requires minimal external components
  • Logic controlled enable input
  • -40°C < TJ < +125°C
  • Power good (PG) signal
  • Up to 7A VTT current
  • Tiny MSOP-10 package
  • Wide bandwidth


  • Desktop computers
  • Notebook computers
  • Communication systems
  • Video cards
  • DDR/DDR2/DDR3 memory termination


MIC6164 Diagram

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Digi-Key P/N Micrel P/N Description Voltage - Output Datasheet
576-3721-5-ND MIC5164YMM IC REG CTLR DUAL DDR2/3 10MSOP Programmable Datasheet