Ultralow Noise DC/DC Regulators Meet Both EMI & Multi-Gigabit SERDES Specifications

In addition, both the LTM4612, designed for regulation of outputs up to 15V, and the LTM4606 have been tested by an accredited EMI laboratory facility (MET Labs, Santa Clara CA) and received CISPR22 Class B certification.

These DC/DC uModule regulators are complete systems protected in an encapsulated surface-mount plastic package and incorporate the inductor, MOSFETs, regulator IC and compensation network. This ultralow noise uModule family eliminates the need for external filters, magnetic shields and ferrite beads and eases a system designer’s difficult tasks of emissions reduction and board layout. Ultralow noise operation is achieved by controlling the slew rate of the MOSFET gate drive, adding input pi-filters, careful layout, shielded inductor, and component selection inside these DC/DC µModule regulators.

The LTM4606 and LTM4612 are housed in a 15mm x 15mm x 2.8mm LGA (land grid array) package weighing less than 2g. The LTM4606 operates from a 4.5V to 28V input supply, regulates an output voltage from 0.6V to 5V and delivers up to 6A to the load. The LTM4612 operates from a 5V to 36V input supply, regulates an output voltage from 3.3V to 15V and delivers up to 5A to the load. They are both characterized for operation over the -40°C to 125°C E and I grade temperature range as well as over the wider temperature range of -55°C to 125°C (internal temperature) MP grade.