TheTPS54418A device is a full featured 6-V, 4-A, synchronous, step-down, current mode
converter with two integrated MOSFETs.
The TPS54418A device 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 device footprint with a small, 3
mm × 3 mm, thermally enhanced, QFN package.
The TPS54418A device provides accurate regulation for a variety of loads with an accurate
±1% voltage reference (VREF) over temperature.
Efficiency is maximized through the integrated 30-mΩ MOSFETs and a 350-&mciro;A typical supply
current. Using the enable pin, shutdown supply current is reduced to 2 µA by entering a shutdown
Undervoltage lockout is internally set at 2.6 V, but can be increased by programming the
threshold with a resistor network on the enable pin. The output voltage startup ramp is controlled
by the soft-start pin. An open-drain power good signal indicates the output is within 93% to 107%
of its nominal voltage. Frequency fold back and thermal shutdown protects the device during an
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