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 x 3 mm thermally enhanced QFN package.
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 mO MOSFETs. Using the enable pin, shutdown supply current is reduced by disabling the device.
The output voltage startup ramp is controlled by the soft start pin that can also be configured for sequencing or tracking. Monotonic startup is achieved with pre-biased voltage. Under voltage 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 nominal voltage.
Cycle-by-cycle current limit, hiccup overcurrent protection and thermal shutdown protect the device during an overcurrent condition.
Two 12 m? (typical) MOSFETs for High Efficiency 6 A Continuous Output Current
200 kHz to 2 MHz Switching Frequency
0.6 V ±1% Voltage Reference Over Temperature (–40°C to 150°C)
Synchronizes to External Clock
Start up with Pre-Biased Voltage
Power Good Output
Adjustable Slow Start and Sequencing
Cycle-by-Cycle Current Limit and Hiccup Current Protection