Linear Technology LTC2923IMS#PBF

Description
The LTC2923 is a power supply tracking controller that provides a simple solution for power supply tracking and sequencing requirements. It allows for flexible configuration of supplies to ramp-up and ramp-down together or with voltage offsets, time delays, or different ramp rates. The LTC2923 introduces currents into the feedback nodes of two independent switching regulators, causing their outputs to track without inserting any pass element losses. It does not affect the transient response or stability of the supplies and presents a high impedance when power-up is complete, effectively removing it from the DC/DC circuit.

Features
Flexible power supply tracking: Tracks both up and down, and supports power supply sequencing.
Supply stability is not affected: Controls two supplies without series FETs and controls a third supply with a series FET.
Adjustable ramp rates: Allows for customization of ramp-up and ramp-down rates.
Electronic circuit breaker: Provides protection from short-circuit conditions when a series FET is used.
Available in 10-lead MS and 12-lead (4mm x 3mm) DFN packages.

Applications
VCORE and Vi/o supply tracking
Microprocessor, DSP, and FPGA supplies
Servers
Communication systems