Features: · Flexible Power Supply Tracking· Tracks Both Up and Down· Power Supply Sequencing· Supply Stability is Not Affected· Low Pin Count· Controls Single Supply without Series FETs· Adjustable Ramp Rate· Supply Shutdown Output· Available in 8-Lead ThinSOT™ and 8-Lead (3mm × 2mm) DFN Pac...
LTC2927: Features: · Flexible Power Supply Tracking· Tracks Both Up and Down· Power Supply Sequencing· Supply Stability is Not Affected· Low Pin Count· Controls Single Supply without Series FETs· Adjustable ...
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The LTC®2927 provides a simple solution to power supply tracking and sequencing requirements. By selecting a few resistors, the supply can be confi gured to ramp-up and ramp-down with differing ramp rates, voltage offsets, or time delays relative to other supplies or a master signal.
By forcing current into a feedback node of an independent supply, the LTC2927 causes the output to track a ramp signal without inserting any pass element losses. Because the current is controlled in an open-loop manner, the LTC2927 does not affect the transient response or stability of the supply. The compact solution at point of load minimizes the trace length of the DC/DC circuit sensitive FB node. Furthermore, it presents a high impedance when power-up is complete, effectively removing it from the DC/DC circuit.