Controller Expands Power Management Capabilities

摘要

Voltage sequencing, tracking and margining are becoming popular features in dc-dc converter modules, but these functions are less commonly found in dc-dc controller chips. A synchronous step-down controller just introduced by Linear Technology incorporates all three of these power management functions. The new chip, the LTC3770, also is distinguished by its fast transient response, a PLL that allows synchronization to a system clock and a highly accurate reference. Capable of operating from a 4-V to 32-V input, the current-mode controller produces a stepped-down output at currents up to about 25 A.