DAC Interfaces To Any DC/DC Regulator

Analog Devices’ Power by Linear LTC7106 embarks as a PMBus I²C controlled precision bidirectional current DAC designed to adjust the output voltage of virtually any dc/dc regulator. Through its PMBus compatible interface, the device receives a seven-bit serial code and converts it to a bidirectional (source, sink) output current. When the current is fed into the feedback network of a regulator, its output voltage can be programmed dynamically for load power/performance optimization or margining in response to serial VID commands. Available in a 2mm x 3mm DFN-10 package, the LTC7106 enables small and simple solution for a wide range of discrete and modular DC/DC voltage regulators.

 

Its internal power-on reset circuitry keeps the DAC output current at zero until a valid write takes place. Other features include a range bit for easy interfacing to almost any impedance resistor divider, and an open-drain output for controlling the Run or Enable pin of the regulator. To prevent abrupt changes in the DAC output current and subsequently the output voltage of the regulator, an internal digital programmable slew rate can be programmed from 500ns/step to 3.5ms/step.

Fierce AI Week

Register today for Fierce AI Week - a free virtual event | August 10-12

Advances in AI and Machine Learning are adding an unprecedented level of intelligence to everything through capabilities such as speech processing and image & facial recognition. An essential event for design engineers and AI professionals, Engineering AI sessions during Fierce AI Week explore some of the most innovative real-world applications today, the technological advances that are accelerating adoption of AI and Machine Learning, and what the future holds for this game-changing technology.

 

The LTC7106 operates over an input voltage range of 2.5V to 5.5V and is supported by the easy to use LTpowerPlay development tool with graphical user interface (GUI). Additional features include ±1% output current accuracy over temperature, a wide range bidirectional DAC output current from ±16µA to ±256µA, wide DAC operational voltage range from 0.4V to 2V, and a precision enable threshold to support external under-voltage lockout. Extended and industrial temperature versions are available from –40 to 125°C. For more information, visit www.linear.com/product/LTC7106.

 

Available in 10-lead, 3 mm x 2 mm DFN package, price starts at $1.25 each/1,000. Get even more spectacular specs from the LTC7106 datasheet.  

Read more on

Suggested Articles

Fact.MR sees global growth for current sensors at 8% a year through 2030. The situation for ADAS sensors is bleak for now, but up over a decade.

Broadband gaps include rural areas and poor neighborhoods and at-home student access, ITIF notes in new report

HP leads the pack, but Apple sees 36% surge in notebooks, desktops compared to a year ago