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.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPS54140 1.5-A, 42-V Step-Down DC-DC Converter With Eco-mode™ datasheet (Rev. C) | PDF | HTML | 14 Nov 2014 |
| Technical article | Minimize the impact of the MLCC shortage on your power application | 29 Mar 2019 | ||
| 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 | ||
| Technical article | Power Tips: My personal IoT and how I would power my favorite | 23 Jun 2014 | ||
| Application note | Differences between the TPS54x40, TPS54x60 and the TPS54x40A, TPS54x60A | 17 Apr 2013 | ||
| Application note | Create an Inverting Power Supply from a Step-Down Regulator (Rev. B) | 26 Oct 2012 | ||
| Application note | Level Shifting Control for an Inverting Buck-boost | 10 Oct 2012 | ||
| User guide | TPS54140EVM-429 1.5 A, SWIFT Regulator Evaluation Module | 19 Mar 2008 |
For additional terms or required resources, click any title below to view the detail page where available.
This worksheet is used to calculate the external components needed to create a dual output (i.e. positive and negative) power supply using a step-down switching regulator and catalog off the shelf coupled (...)
| Package | Pins | Download |
|---|---|---|
| HVSSOP (DGQ) | 10 | View options |
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