The TPS57140-Q1 device is a 42-V, 1.5-A step-down regulator with an integrated high-side
MOSFET. Current-mode control provides simple external compensation and flexible component
selection. A low-ripple pulse-skip mode reduces the no-load, regulated output supply current to 116
μA. When the enable pin is in the low state, the shutdown current is reduced to 1.5 µA.
Undervoltage lockout is internally set at 2.5 V, but can be increased using the enable
pin. The output voltage startup ramp is controlled by the slow-start pin that can also be
configured for sequencing or tracking. An open-drain power-good signal indicates the output is
within 92% to 109% of its nominal voltage.
A wide switching-frequency range allows optimization of efficiency and external component
size. Frequency foldback and thermal shutdown protect the part during an overload condition.
The TPS57140-Q1 is available in a 10-pin thermally enhanced MSOP-PowerPAD package (DGQ) and a 10-pin VSON package (DRC).
For all available packages, see the orderable addendum at the
end of the data sheet.
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