Fully integrated DDR memory power, with 4A buck DC/DC

October 04, 2016 // By Graham Prophet
Texas Instruments has introduced the first fully integrated power management solution for double date rate (DDR)2, DDR3 and DDR3L memory subsystems in automotive and industrial applications.

The TPS54116-Q1 DC/DC buck converter is a 2.95-V to 6-V input, 4-A synchronous step-down converter with a 1-A peak sink/source DDR termination and buffered reference that reduces system size by up to 50% compared to discrete implementations.


Designed for automotive applications such as infotainment, advanced driver assistance systems (ADAS) and instrument clusters, the TPS54116-Q1 can also power DDR memory in telecommunication, test and measurement, and factory automation equipment. Used in conjunction with TI’s WEBENCH online design tools, the TPS54116-Q1 simplifies power conversion and speeds the power-supply design process.


The buck converter provides up to 2.5-MHz switching frequency and minimizes solution size by integrating the MOSFETs and reducing inductor size. The switching frequency can be set above the medium-wave radio band for noise-sensitive applications and is synchronizable to an external clock. A blog post, “Four design tips to obtain 2-MHz switching frequency” is here. Download the Automotive Power Reference Design for Low Power TDA3x Based Systems to create an integrated, size-optimized power supply for ADAS.


TPS54116-Q1 features;

- Integrated low- and high-side power MOSFETs and a 1-A sink/source DDR VTT termination regulator support 4A of continuous output current.

- Current-mode control with external clock-synchronization capability keeps the frequency fixed across the entire output load range.

- AEC-Q100 qualified with 4-kV electrostatic discharge (ESD) protection for automotive applications.


The converter is packaged in a thermally enhanced 24-pin, 4 x 4 x 0.75-mm very thin quad flat no-lead (WQFN) package and priced at $2.50 (1000). The TPS54116-Q1 evaluation module is available.


TI; http://www.ti.com/tps54116q1-pr