The TPS65311-Q1 device is a power-management unit, meeting the requirements
of digital-signal-processor (DSP) controlled-automotive systems (for example,
advanced driver-assistance systems). With the integration of commonly used
supply rails and features, the TPS65311-Q1 device significantly reduces board
space and system costs.
The device is capable of providing stable output voltages to the application,
including a typical 5-V CAN-supply, from a varying input power supply (such as
an automotive car battery) between 4 V and 40 V. The device includes one
synchronous buck controller as a pre-regulator that offers flexible output power
to the application. For post-regulation, the device includes two synchronous
buck and one asynchronous boost converter, working at a switching frequency of
2.45 MHz to allow for a smaller inductor which requires less board space. The
two buck converters also offer internal loop compensation which eliminates the
need for external compensation components. Furthermore, the device includes a
low-noise linear regulator.
For system safety, the device includes voltage monitoring on all supply rails
and a window-watchdog to monitor the MCU and DSP. Other features include a
high-side driver which drives a warning-lamp LED, a reference voltage which is
used as ADC reference in the MCU, DSP, and a shutdown comparator which, in
combination with external NTC-resistor, switches off the device at too-low
For all available packages, see the orderable addendum at the end of the datasheet.
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