TPS54678 device is a full-featured 6-V, 6-A, synchronous step-down current mode converter
with two integrated MOSFETs.
TPS54678 enables small designs by integrating the MOSFETs, implementing current mode
control to reduce external component count, reducing inductor size by enabling up to 2-MHz
switching frequency, and minimizing the IC footprint with a small 3-mm × 3-mm thermally enhanced
TPS54678 provides accurate regulation for a variety of loads with an accurate ±1% voltage
reference (VREF) over temperature.
Efficiency is maximized through the integrated 12-mΩ MOSFETs. Using the enable (EN) pin,
shutdown supply current is reduced by disabling the device.
The output voltage start-up ramp is controlled by the soft-start (SS) pin that can also
be configured for sequencing or tracking. Monotonic start-up is achieved with prebiased voltage.
Undervoltage lockout can be increased by programming the threshold with a resistor divider on the
enable pin. An open-drain power good signal indicates the output is within 93% to 105% of its
Cycle-by-cycle current limit, hiccup overcurrent protection and thermal shutdown protect
the device during an overcurrent condition.