Sequencers, Trackers, and Margining Controllers

Sequencers, Trackers, and Margining Controllers

Analog Devices sequencers, trackers, and margining controllers provide additional functionality to one or multiple power supplies. Our sequencing controllers allow power supplies to be turned on or off in any order by adding time delays to each supply. In a tracking-based system, a master voltage rail is chosen and all of the lower voltage rails are slaved to its on-ramp or off-ramp. When testing power supplies in an automated PCB test environment, a margining controller allows power supply output voltages to be precisely adjusted up and down by sourcing or sinking current into the feedback node or voltage adjust pin of the power supply. This allows a system to test the correct operation of electrical components at the upper and/or lower power supply voltage limits specified for a given design.

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Margining Controllers

Analog Devices margining controllers are precise (±0.4%), resistor programmable, and configurable for the symmetrical margining of two power supplies or the asymmetrical margining of a single power supply. When testing power supplies in automated PCB test environments, these devices allow power supply output voltages to be precisely adjusted up and down by sourcing or sinking current into the feedback node or voltage adjust pin of a power supply. This allows systems to test the correct operation of electrical components at the upper and/or lower power supply voltage limits specified for a given design.

Supply Sequencers

Analog Devices analog and digital supply sequencers cover a wide range of power supply sequencing needs for systems with multiple power rails, including complex systems that utilize FPGAs, ASICS, PLDs, DSPs, data converters (ADCs or DACs), and microcontrollers. These high performance components may demand that certain rails power-up and/or power-down. Our supply sequencers are easy to design in, accurate, and cascadable, which allows designers to quickly architect reliable systems with hundreds of rails in any type of application. Standout features include charge pumped gate drives for MOSFETs in series with supplies, externally configurable timers, integrated supply supervisors, and a host of digital inputs/outputs for simple communications.

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Analog Sequencers

Digital Sequencers

Trackers

Analog Devices trackers cover a wide range of supply sequencing needs for systems with multiple power rails, including complex systems that utilize FPGAs, ASICS, PLDs, DSPs, data converters (ADCs or DACs), and microcontrollers. These high performance components may demand that certain rails power-up and/or power-down in a specific order, either based on a specified time delay or an event (for example, voltage tracking). Our trackers feature the use of external N-channel control MOSFETs to minimize power loss and integrated remote sense switches to compensate for series voltage drops in the wiring.