The TPS54040ADGQR is a 0.5A 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 input supply current to 116μA. Using the enable pin, shutdown supply current is reduced to 1.3μA when the enable pin is low. 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 optimization. Frequency foldback and thermal shutdown protect 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 TPS54040 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
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