0.5cm² PCB size

Linear Technology Korea (CEO Hong Sa-kwak) announced the release of a triple-output µModule (power module) regulator (product name: LTM4632) capable of supplying power to all three voltage rails of the new QDR4 and older DDR SRAM (VDDQ, VTT, VTTR, or VREF).

Available in a small, lightweight, low-height LGA package (6.25mm x 6.25mm x 1.82mm), this product can be soldered to the back of a PCB. It requires only one external resistor and three capacitors, so the required circuit area is only 0.5cm² (double-sided) or 1cm² (single-sided).



The LTM4632 can provide 3A VDDQ and ±3A VTT (=1/2*VDDQ), and when configured in parallel, can provide up to 6A per rail for a large memory bank. For supplying VDDQ current of 6A or more, LTM4632 can be configured with LTM4630 supplied between 18A and 36A VDDQ to be suitable for large-capacity arrays of SRAM.

If VDDQ is already available, the LTM4632 can be configured to supply a single VTT output in two phases up to 6A.

The LTM4632 can operate with a low input voltage of 3.3V as well as standard 5V and 12V inputs (up to 15V). Each of the two output voltages (VDDQ and VTT) operates in the range of 0.6V to 2.5V. The third output is a low-noise 10mA buffered output for the SRAM's VTTR.

This product can be used in PCIe, cloud-based systems, RAID, video processing, and networks using SRAM (DDR/DDR-II/DDR-III/DDR4/QDR/QDR-II/QDR-II+, QDR4).