LTC7106 can be used for discrete and modular DC/DC voltage regulators.
A PMBus I2C controlled precision bi-directional current DAC from Analog Devices is designed to adjust the output voltage of virtually any DC/DC regulator. The Power by Linear device uses its PMBus compatible interface to receive a seven-bit serial code which is converted to a bi-directional (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 optimisation or margining in response to serial VID commands.
The LTC7106 is available in a 10-lead 2.0 x 3.0mm DFN-10 package, and can be used for a wide range of discrete and modular DC/DC voltage regulators, says Analog Devices.
Its internal power-on reset circuitry keeps the DAC output current at zero until a valid write takes place. There is also a range bit to interface to almost any impedance resistor divider, and an open-drain output for controlling the run or enable pin of the regulator. An internal digital programmable slew rate can be programmed from 500ns/step to 3.5ms/step to prevent abrupt changes in the DAC output current and subsequently the output voltage of the regulator.
The LTC7106 operates over an input voltage range of 2.5 to 5.5V and is supported by the LTpowerPlay development tool with graphical user interface (GUI). It is easy to use, reassures Analog Devices. Additional features include ± one per cent output current accuracy over temperature, a wide range bi-directional DAC output current from ±16 to ±256-micro A, wide DAC operational voltage range from 0.4 to 2.0V, and a precision enable threshold to support external under-voltage lockout.
Extended and industrial temperature versions are available, operating from -40 to +125 degree C.
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