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TPS53840
  • TPS53840
  • TPS53840

TPS53840

ACTIVE

Enhanced high-current PMIC for DDR5 server MRDIMM

Texas Instruments TPS53840 Product Info

1 April 2026 3

Parameters

Vin (min) (V)

4.5

Vin (max) (V)

15

Features

Complete Solution

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Iq (typ) (mA)

5

DDR memory type

DDR5, DDR5 server

Package

VQFN-HR (RWZ)-35-25 mm² 5 x 5

Features

  • Compliant to JEDEC PMIC5020 for DDR5 MRDIMM and RDIMM
  • 4 Buck regulators
    • SWA (1.1V) 8.5A DC/10A Pk
    • SWB (1.1V) 8.5A DC/10A Pk
    • SWC (1.1V) 10A DC/11.5A Pk
    • SWD (1.8V) 3A DC/3.5A Pk
  • Single or dual phase for SWA and SWB
  • 2 LDO: 1.8V / 25mA and 1.0V / 20mA
  • VIN_Bulk (4.25V to 15V) and VIN_Mgmt (3.0V to 3.6V) input supplies
  • Automatic switchover from VIN_Mgmt to VIN_Bulk
  • Overvoltage, under voltage, over current, temperature warning and temperature shutdown
  • Error injection capability
  • DIMM specific registers for customization (EEPROM)
  • Persistent error log registers
  • Programmable switching frequency: 500kHz to 1.375MHz
  • Power good pin (CAMP) and General status interrupt pin (GSI_n)
  • I2C and I3C Bus interface for telemetry of voltage, current, power, temperature, and fault conditions
  • Enable with I2C/I3C, VR_EN pin or Auto power on
  • 5mm × 5mm, 35-Pin, QFN PowerPad™ package
  • Compliant to JEDEC PMIC5020 for DDR5 MRDIMM and RDIMM
  • 4 Buck regulators
    • SWA (1.1V) 8.5A DC/10A Pk
    • SWB (1.1V) 8.5A DC/10A Pk
    • SWC (1.1V) 10A DC/11.5A Pk
    • SWD (1.8V) 3A DC/3.5A Pk
  • Single or dual phase for SWA and SWB
  • 2 LDO: 1.8V / 25mA and 1.0V / 20mA
  • VIN_Bulk (4.25V to 15V) and VIN_Mgmt (3.0V to 3.6V) input supplies
  • Automatic switchover from VIN_Mgmt to VIN_Bulk
  • Overvoltage, under voltage, over current, temperature warning and temperature shutdown
  • Error injection capability
  • DIMM specific registers for customization (EEPROM)
  • Persistent error log registers
  • Programmable switching frequency: 500kHz to 1.375MHz
  • Power good pin (CAMP) and General status interrupt pin (GSI_n)
  • I2C and I3C Bus interface for telemetry of voltage, current, power, temperature, and fault conditions
  • Enable with I2C/I3C, VR_EN pin or Auto power on
  • 5mm × 5mm, 35-Pin, QFN PowerPad™ package

Description

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 VR_EN 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.

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