DC/DC regulator tips tracking, fixed frequency PLL

Linear Technology Corp. announces the LTM4618 6A DC/DC Module Regulator, which includes the inductor, MOSFETs, DC/DC regulator, input and output bypass capacitors and supporting circuitry in a 2.3g, 9mm x 15mm x 4.32mm LGA package.

The LTM4618 features output voltage tracking for systems that need to sequence multiple rails for proper power up and down, and 250kHz to 780kHz fixed frequency PLL capability for noise-sensitive applications that require the switching frequency of the regulator to be a set value. For low voltage loads such as Vcore of FPGAs and processors, the LTM4618 includes safety features such as output overvoltage and short-circuit protection, as well as guaranteed ±1.75 percent maximum total output DC error. The modules is suited for medical systems, ATCA cards, single-board computers, plus industrial and networking equipment.

The module's current-mode topology and its high switching frequency operation deliver very fast transient response to line and load changes without sacrificing stability. The device operates from 4.5V to 26.5V input supplies and regulates an output voltage from 0.8V to 5V. Burst Mode operation or pulse-skipping mode enable selection of either the highest operating efficiency or lower output ripple at light loads. The LTM4618 is rated for operation from -40锟紺 to 125锟紺. Pricing starts at $11.30 each for 1,000-piece quantities.