The TPS54140ADGQ is a 42V 1.5A Step-down Converter with an integrated high-side MOSFET and Eco-mode™. 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 116µA. Using the enable pin, shutdown supply current is reduced to 1.3µA. Under-voltage lockout is internally set at 2.5V, but can be increased using the enable pin. The output voltage start-up ramp is controlled by the slow start pin that can also be configured for sequencing/tracking. An open drain power good signal indicates the output is within 94 to 107% of its nominal voltage. A wide switching frequency range allows efficiency and external component size to be optimized. Frequency fold back and thermal shutdown protects the part during an overload condition.
200mR High-side MOSFET
High efficiency at light loads with a pulse-skipping Eco-mode™
Tighter enable threshold than TPS54140 for more accurate UVLO voltage
Adjustable UVLO voltage and hysteresis
116µA Operating quiescent current
1.3µA Shutdown current
100kHz to 2.5MHz Switching frequency
Synchronizes to external clock
Adjustable slow start/sequencing
UV and OV power-good output
0.8V Internal voltage reference
Green product and no Sb/Br
This device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.