The TPS53681 is a multiphase step-down controller with dual channels,
built-in non-volatile memory (NVM), and PMBus™ interface, and is
fully compatible with TI NexFET ™power stage. Advanced control
features such as D-CAP+™ architecture with undershoot reduction
(USR) provide fast transient response, low output capacitance, and high efficiency. The device also
provides novel phase interleaving strategy and dynamic phase shedding for efficiency improvement at
different loads. The device supports fast dynamic voltage transitions with adjustable slew rate. In
addition, the device supports the PMBus communication interface for reporting the telemetry of
voltage, current, power, temperature, and fault conditions to the systems. All programmable
parameters can be configured by the PMBus interface and can be stored in NVM as the new default
values to minimize the external component count.
The TPS53681 device is offered in a thermally enhanced 40-pin QFN
packaged and is rated to operate from –40°C to 125°C.
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