AU4752 is an AVSBus compliant dual output 5 phase buck controller with built-in OTP & MTP non-volatile memories (NVM), PMBus™ & AVSBus interfaces. Advanced control features such as programmable DC and AC load line, undershoot (UVR) & overshoot reduction (OVR) provide fast transient response hence needing low output capacitance. 

The device also provides dynamic phase add/drop for efficiency improvement across loads. It can be configured to 4 phase in Rail A and 1 Phase in Rail B. It supports fast dynamic voltage transitions with programable slew rates. 

Programmable parameters can be configured by the PMBus/AVSBus interface and can be stored in NVM as default values. The MTP gives an added advantage of optimizing the device performance in the field. 

The controller enables and supports advanced diagnostic capability. 

• Multi-phase scalable power supply

    -Rail A: Up to 4 Phases

    -Rail B: Up to 1 Phase

    -Dual output voltage control loop 

• Improved performance

    -Improved efficiency: Auto phase add/drop 

    -Programmable Over-shoot & Under-shoot Reduction 

     thresholds for better transient 

    -Automatic Efficiency Management for fine frequency 

     control resulting in ~2% increase in efficiency

• Input and Output Range, Accuracy, Telemetry

    -4.5 V to 24 V input, 0.4 V to 2.5 V output 

    -1% accurate output with differential sense & AVP for 

      improved processor power & performance 

    -Supports up to 400 A output current

• Protection Capability

    -Programmable Fault Recovery: Latch & Hiccup 

    -All protections: UVLO, UVP, OVP, OCP, OTP 

    -Cycle by cycle per-phase current limit 

    -Thermal Balance Management (TBM™) 

• 5 mm × 5 mm, 40-Pin, QFN Package

• Servers

• Graphics cards

• FPGAs

• ASICs