4.5V to 20V Input, 1.2V 3A Synchronous Step-Down SWIFT™ Converter w/ Low-Side Gate Driver


Product details


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Package | Pins | Size

HTSSOP (PWP) 16 32 mm² 5 x 6.4 open-in-new Find other Buck converters (integrated switch)


  • 100 mΩ, 4.5-A Peak MOSFET Switch for High Efficiency at 3-A Continuous Output Current
  • Uses External Lowside MOSFET or Diode
  • Fixed Output Versions — 1.2V/1.5V/1.8V/2.5V/3.3V/5.0V
  • Internally Compensated for Low Parts Count
  • Synchronizes to External Clock
  • 180° Out of Phase Synchronization
  • Wide PWM Frequency — Fixed 250 kHz, 500 kHz or Adjustable 250 kHz to 700 kHz
  • Internal Slow Start
  • Load Protected by Peak Current Limit and Thermal Shutdown
  • Adjustable Undervoltage Lockout
  • 16-Pin TSSOP PowerPAD™ Package
    • Industrial & Commercial Low Power Systems
    • LCD Monitors and TVs
    • Computer Peripherals
    • Point of Load Regulation for High Performance DSPs, FPGAs, ASICs and Microprocessors

PowerPAD and SWIFT are trademarks of Texas Instruments.

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The TPS5435x is a medium output current synchronous buck PWM converter with an integrated high side MOSFET and a gate driver for an optional low side external MOSFET. Features include a high performance voltage error amplifier that enables maximum performance under transient conditions. The TPS5435x has an under-voltage-lockout circuit to prevent start-up until the input voltage reaches a preset value; an internal slow-start circuit to limit in-rush currents; and a power good output to indicate valid output conditions. The synchronization feature is configurable as either an input or an output for easy 180° out of phase synchronization.

The TPS5435x devices are available in a thermally enhanced 16-pin TSSOP (PWP) PowerPAD™ package. TI provides evaluation modules and the SWIFT™ Designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles.

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Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
TPS54320 ACTIVE 4.5V to 17V Input, 3A Synchronous Step-Down SWIFT™ Converter Synchronous, higher efficiency, higher output accuracy, and high switching frequency product.

Technical documentation

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Type Title Date
* Datasheet TPS54352/3/4/5/6/7: 4.5-V to 20-V Input, 3-A Output Synchronous PWM Switcher datasheet (Rev. A) Oct. 27, 2004
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application notes TMS320C6472 5V Input Pwr Design, Integrated FET DC/DC Converters and Controllers Mar. 26, 2010
Application notes Cyclone™ III FPGA Starter Kit Power Reference Design Mar. 27, 2008
Application notes Seminar 900 Topic 2 - Snubber Circuits: Theory, Design and Application Feb. 15, 2001

Design & development

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Hardware development

document-generic User guide

Recommended tool:
TPS54320 is the recommended alternative to the TPS5435X devices. Please refer to the TPS54320EVM for new device evaluation.

The TPS54356EVM-058 evaluation module allows the designer to evaluate the internally compensated TPS54356 DC/DC converter optimized for low parts count. The (...)

  • Internal compensation for fewer external components
  • 90% efficiency
  • Uses optional low-side MOSFET for high efficiency synchronous rectification
  • Aluminum Electrolytic input and output capacitors
  • Supported by SWIFT Designer software tool for quick and easy design

CAD/CAE symbols

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HTSSOP (PWP) 16 View options

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