The TPS54140A 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, shutdown supply current is reduced to 1.3 µA.
Under voltage 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/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.
3.5 V to 42 V Input Voltage Range
200-mO 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
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/Sequencing
UV and OV Power Good Output
0.8-V Internal Voltage Reference
MSOP10 and 3mm × 3mm VSON-10 Package With PowerPAD
Supported by WEBENCH and SwitcherPro Software Tool