Calculation tool
Data sheet
A newer version of this product is available
This product continues to be available for existing customers. New designs should consider an alternate product.
Drop-in replacement with upgraded functionality to the compared device
TPS54540
- High Efficiency at Light Loads with Pulse Skipping Eco-mode™
- 92-mΩ High-Side MOSFET
- 146 µA Operating Quiescent Current and
2 µA Shutdown Current - 100 kHz to 2.5 MHz Fixed Switching Frequency
- Synchronizes to External Clock
- Low Dropout at Light Loads with Integrated BOOT Recharge FET
- Adjustable UVLO Voltage and Hysteresis
- 0.8 V 1% Internal Voltage Reference
- 8-Terminal HSOP with PowerPAD™ Package
- –40°C to 150°C TJ Operating Range
- Create a Custom Design using the TPS54540 with the WEBENCH® Power Designer
The TPS54540 is a 42 V, 5 A, step down regulator with an integrated high side MOSFET. The device survives load dump pulses up to 45V per ISO 7637. Current mode control provides simple external compensation and flexible component selection. A low ripple pulse skip mode reduces the no load supply current to 146 µA. Shutdown supply current is reduced to 2 µA when the enable pin is pulled low.
Undervoltage lockout is internally set at 4.3 V but can be increased using the enable pin. The output voltage start up ramp is internally controlled to provide a controlled start up and eliminate overshoot.
A wide switching frequency range allows either efficiency or external component size to be optimized. Output current is limited cycle-by-cycle. Frequency foldback and thermal shutdown protects internal and external components during an overload condition.
The TPS54540 is available in an 8-terminal thermally enhanced HSOP PowerPAD™ package.
Technical documentation
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View all 7 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPS54540 4.5-V to 42-V Input, 5 A, Step Down DC-DC Converter with Eco-mode™ datasheet (Rev. B) | PDF | HTML | 20 Mar 2016 |
| Application note | NRND & Differences TPS54340/360/540/560 and TPS54340B/360B/540B/560B | 05 Apr 2019 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| Application note | Creating a Universal Car Charger for USB Devices From the TPS54240 and TPS2511 (Rev. E) | 16 Sep 2013 | ||
| EVM User's guide | Evaluation Module for the TPS54540 Step-Down Converter | 01 Feb 2013 | ||
| Application note | Create a Split-Rail Power Supply with a Wide Input Voltage Buck Regulator (Rev. A) | 26 Oct 2012 | ||
| Application note | Create an Inverting Power Supply from a Step-Down Regulator (Rev. B) | 26 Oct 2012 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
TPS54540EVM-558 — TPS54540 Step-Down DC-DC Converter Evaluation Module
The Texas Instruments TPS54540EVM-558 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS54540 Step-Down Converter. The EVM operates from an 6V to 42V input (12V nominal) and provides a 3.3V output at 5A.
User guide: PDF
Simulation model
TPS54540 Unencrypted PSpice Average Model Package (Rev. A)
SLVMA28A.ZIP (205 KB) - PSpice Model
Simulation model
TPS54540 Unencrypted PSpice Transient Model Package (Rev. A)
SLVM871A.ZIP (125 KB) - PSpice Model
Calculation tool
SWIFTINV-CALC — SWIFT™ Converter Inverting Buck/Boost Calculator
The SWIFTINV-CALC Excel sheet is a complementary worksheet to the SLVA317 application note. The worksheet is used to calculate the external components needed to create a negative output voltage from a positive input voltage. The tool features several families of wide input voltage, current-mode (...)
Supported products & hardware
Products
AC/DC & DC/DC converters (integrated FET)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
Ordering & quality
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Information included:
- Fab location
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Support & training
TI E2E™ forums with technical support from TI engineers
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