Calculation tool
Data sheet
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Drop-in replacement with upgraded functionality to the compared device
TPS54340
- 4.5 V to 42 V (45 V Abs Max) Input Range
- 3.5 A Continuous Current, 4.5 A Minimum Peak Inductor Current Limit
- Current Mode Control DC-DC Converter
- 92-mΩ High-Side MOSFET
- High Efficiency at Light Loads with Pulse Skipping Eco-mode™
- Low Dropout at Light Loads with Integrated BOOT Recharge FET
- 146 µA Operating Quiescent Current
- 1 µA Shutdown Current
- 100 kHz to 2.5 MHz Fixed Switching Frequency
- Synchronizes to External Clock
- Adjustable UVLO Voltage and Hysteresis
- Internal Soft-Start
- Accurate Cycle-by-Cycle Current Limit
- Thermal, Overvoltage, and Frequency Foldback Protection
- 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 with WEBENCH Tools
The TPS54340 is a 42 V, 3.5 A, step down regulator with an integrated high side MOSFET. The device survives load dump pulses up to 45 V 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 1 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. Frequency foldback and thermal shutdown protects internal and external components during an overload condition.
The TPS54340 is available in an 8-terminal thermally enhanced HSOP PowerPAD™ package.
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Technical documentation
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View all 10 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPS54340 42 V Input, 3.5 A, Step Down DC-DC Converter with Eco-mode™ datasheet (Rev. D) | PDF | HTML | 20 Mar 2017 |
| 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 | ||
| Test report | Test Report for the iPad Automotive Charger | 11 Jun 2013 | ||
| EVM User's guide | Using the TPS54340 Step-Down Converter Evaluation Module (Rev. A) | 12 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 | ||
| Application note | Level Shifting Control for an Inverting Buck-boost | 10 Oct 2012 | ||
| Application note | Creating GSM Power Supply from TPS54260 | 30 Apr 2010 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
TPS54340EVM-182 — TPS54340 Step-Down Converter Evaluation Module
The Texas Instruments TPS54340EVM-182 evaluation module (EVM) helps designers evaluate the performance of the TPS54340 Step-Down DC/DC Converter. The EVM operates from a 8V to 60V input (12V nominal) and provides a 5.0V output at 3.5A. The EVM demonstrates the small, printed-circuit-board (PCB) (...)
User guide: PDF
Simulation model
TPS54340 TINA-TI Transient Reference Design
SLVM984.TSC (498 KB) - TINA-TI Reference Design
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)
Reference designs
TIDA-01414 — TPA3244 Dolby Atmos Soundbar Reference Design
The TPA3244 Dolby Atmos® Soundbar Reference Design combines Ultra-HD audio and high dynamic range to create room filling audio experience from a small form factor system. The design leverages TI's high-performance TPA3244 amplifier, PCM5252 high-performance DAC with processing, and an (...)
Reference designs
PMP10090 — Dual Output Rail Power Supply with Inverting Buck Boost Converter Reference Design
PMP10090.1 shows a power supply, which provides a positive and a negative voltage rail in an inverting Buck Boost configuration. A 12V input is converted to 15V and -15V output voltages with 700mA load current each.
Reference designs
PMP10282 — 5V@2.1A USB Charger Automotive Reference Design
This USB 3.0 charger provides 5V @ 2.1A over an automotive input range of 8V - 40V. It uses the integrated FET TPS54340 PWM Buck controller and implements cable voltage droop compensation. A TPS2546 charging port controller provides data line switching plus an integrated FET with dual current (...)
Reference designs
PMP4488 — USB-C DFP 5V3A Charger Reference Design
The PMP4488 is low cost 5V3A charger reference design providing Type C DFP feature and is compliant with BC1.2 device. The design includes a non-synchronous step-down regulator TPS54340 and highly integrated USB type-C controller TPS25810. The PMP4488 demonstrates high efficiency, good (...)
Reference designs
TIDA-IPAD-AUTOMOTIVE-CHARGER-REFERENCE-DESIGN — iPad® Automotive Charger Reference Design
The reference design provides customers an extremely small form factor but still compliant to the iPad® charge current requirement of up to 2.1A at 5V. The switching buck, TPS54340, features switching frequency that is up to 2MHz which is above the audio band requirements. Customers can (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
Ordering & quality
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Support & training
TI E2E™ forums with technical support from TI engineers
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