Summit Micro controller unit has margining functions

The SMM665 six-channel active controller from Summit Microelectronics includes sequencing and margining functions that are suitable for applications such as networking and communications equipment where carrier-class availability is essential.
Utilizing the company's active dc output control (ADOC) engineering concept, the ADOC function maintains the output voltage of up to six dc-dc converters on the user's board, improving voltage accuracy in normal system use.

The SMM665 is useful during the initial turn-on of the board during production to perform "margining". Margining is the temporary adjusting of each of the six dc-dc converter supply voltages up to±10 percent in any combination so that sensitivity of the system to power supply changes can be determined.

The product can also be configured to sequence up to six voltage supplies in any order during both power-up and power-down transitions. This sequencing can be set by the user to cascade each supply as the prior supply completes its transition, therefore relieving the user of the need to calculate the slew rate of each supply voltage depending on its loading, and specifying a safe delay time before the next supply can be actuated.

An evaluation card containing the SMM665 controller, six dc-dc converters, all required associated circuitry, and a port for "plug and play" programming via the SMX33200 dongle interface is available. Offered in a 48-pin TQFP surface-mount package.