The TPS54140 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. Using the enable pin, the shutdown supply current is reduced to 1.3 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 and tracking. An open-drain power-good signal indicates the output is within 94% to 107% of the nominal voltage.
●A wide switching frequency range allows efficiency and external component size to be optimized. Frequency foldback and thermal shutdown protects the device during an overload condition.
●The TPS54140 device is available in a 10-pin thermally enhanced MSOP PowerPAD package.
● 3.5- to 42-V Input Voltage Range
● 200-mΩ High-Side MOSFET
● High Efficiency at Light Loads with a
●Pulse Skipping Eco-mode™
● 116-µA Operating Quiescent Current
● 1.3-µA Shutdown Current
● 100-kHz to 2.5-MHz Switching Frequency
● Synchronizes to External Clock
● Adjustable Slow Start and Sequencing
● UV and OV Power-Good Output
● Adjustable UVLO Voltage and Hysteresis
● 0.8-V Internal Voltage Reference
● MSOP10 Package With PowerPAD
● Supported by WEBENCH® Software Tool
●(www.TI.com/WEBENCH)
