Enhanced high-current PMIC for DDR5 server MRDIMM

The TPS53840 is a D-CAP+™

mode integrated step-down converter for DDR5 on-DIMM power supply in

servers fully compliant to Jedec PMIC5020. It provides VDD, VDDQ and

VPP voltages to the DRAM chips on the DIMM module with configurable

current capability. SWA and SWB can be configured to be either a

dual phase output (20A) or 2 single outputs

(10A each), while SWC is a single

phase rail capable of 11.5A. The converter also employs internal

compensation for ease of use and reduce external components.

The converter provides a full set of telemetry,

including input voltage, output voltage, output current and output

power. Protection features include input and output over voltage,

input and output undervoltage, buck overcurrent limit, and die over

temperature.

TPS53840 with its significantly

higher current capability than JEDEC PMIC5000, and configurable Auto

power on or VREN pin, is suitable for CXL memory module

applications.

The TPS53840 is

packaged in a thermally-enhanced 35-pin QFN and operates from -40°C to +105°C.