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.
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/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.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPS54140A 1.5-A, 42-V Step-Down DC/DC Converter with Eco-mode™ datasheet (Rev. C) | PDF | HTML | 28 Oct 2015 |
| White paper | Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) | PDF | HTML | 30 Apr 2024 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| Application note | Understanding Eco-mode(TM) Operation | 05 Dec 2016 | ||
| Application note | Design Considerations for DC-DC Converters in Fast-Input Slew Rate Applications | 05 Mar 2015 | ||
| Application note | Methods to Improve Low Dropout Operation with the TPS54240 and TPS54260 (Rev. A) | 06 Nov 2013 | ||
| Application note | Differences between the TPS54x40, TPS54x60 and the TPS54x40A, TPS54x60A | 17 Apr 2013 | ||
| Application note | Level Shifting Control for an Inverting Buck-boost | 10 Oct 2012 |
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