The SMT4504 provides a complete quad supply rail management, while incorporating a level of programmability and integration previously missing in power management offerings. The device can track or sequence up to four external DC/DC converter ICs with programmable sequence ordering and delay times, without the need for any external components. In addition, when supplies are assigned to the same sequence position, the SMT4504 allows these rails to be tracked at the same or different (ratiometric) slew rates - a very useful feature for applications requiring supplies to be started at the same time but to ramp up at different rates.

The SMT4504 is the first true "loss-less tracker" on the market, eliminating the need for external series MOSFETs by interfacing directly to the converter's TRIM input pin. This allows designs to reduce board space, component count and power dissipation. Moreover, the elimination of MOSFET switches results in improved load regulation, a critical performance parameter in applications utilizing low core voltages.

Continuing the tradition of offering high levels of design flexibility, the SMT4504 allows many of the essential parameters to be programmed and therefore adjusted to new design requirements. This allows original equipment and original design manufacturers (OEMs and ODMs) to reduce their development time and engineering investment and bring products to market faster and more reliably.

The SMT4504 incorporates Summit's proprietary "Link" function that provides seamless expanding operation when more than 4 supplies are involved. This allows several SMT4504 devices to control up to 48 power supplies in a single system. Furthermore, it offers the ability to accurately (1%) monitor each channel for detecting under- and over-voltage conditions. These voltage trip-points, as well as the fault trigger conditions and output polarities, are programmable, allowing for great design flexibility. Programmable slew rate control is also available to enable power supply rails to rise and fall at different rates.