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TPS54350

ACTIVE

4.5V to 20V Input, 3A Synchronous Step-Down Converter with Low-Side Gate Driver

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Data sheet

TPS54350

ACTIVE
Data sheet Order now

Product details

Vin (Min) (V) 4.5 Vin (Max) (V) 20 Vout (Min) (V) 0.9 Vout (Max) (V) 12 Iout (Max) (A) 3 Iq (Typ) (mA) 5 Switching frequency (Min) (kHz) 250 Switching frequency (Max) (kHz) 700 Features Enable, Frequency synchronization, Phase Interleaving, Power good, Synchronous Rectification Rating Catalog Regulated outputs (#) 1 Control mode Voltage mode Duty cycle (Max) (%) 80
Vin (Min) (V) 4.5 Vin (Max) (V) 20 Vout (Min) (V) 0.9 Vout (Max) (V) 12 Iout (Max) (A) 3 Iq (Typ) (mA) 5 Switching frequency (Min) (kHz) 250 Switching frequency (Max) (kHz) 700 Features Enable, Frequency synchronization, Phase Interleaving, Power good, Synchronous Rectification Rating Catalog Regulated outputs (#) 1 Control mode Voltage mode Duty cycle (Max) (%) 80
HTSSOP (PWP) 16 32 mm² 5 x 6.4
  • 100 m, 4.5-A Peak MOSFET Switch for High Efficiency at 3-A Continuous Output Current
  • Uses External Lowside MOSFET or Diode
  • Output Voltage Adjustable Down to 0.891 V With 1% Accuracy
  • 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
  • APPLICATIONS
    • 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.
  • 100 m, 4.5-A Peak MOSFET Switch for High Efficiency at 3-A Continuous Output Current
  • Uses External Lowside MOSFET or Diode
  • Output Voltage Adjustable Down to 0.891 V With 1% Accuracy
  • 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
  • APPLICATIONS
    • 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.

The TPS54350 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 and flexibility in choosing the output filter inductors and capacitors. The TPS54350 has an under-voltage-lockout circuit to prevent start-up until the input voltage reaches 4.5 V; 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 TPS54350 device is 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.

The TPS54350 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 and flexibility in choosing the output filter inductors and capacitors. The TPS54350 has an under-voltage-lockout circuit to prevent start-up until the input voltage reaches 4.5 V; 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 TPS54350 device is 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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Technical documentation

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Type Title Date
* Data sheet 4.5V to 20V Input, 3-A Output Synchronous PWM Switcher w/Integrated FET (SWIFT) datasheet (Rev. C) 28 Oct 2004
User guide TPS54350 Step-Down Converter Evaluation Module User's Guide (Rev. B) PDF | HTML 18 Oct 2021
EVM User's guide TPS54550 Step-Down Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 25 Aug 2021
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
Application note Seminar 900 Topic 2 - Snubber Circuits: Theory, Design and Application 15 Feb 2001

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPS54350EVM-235 — 3-A, 4.5 to 20Vin DC/DC Converter with Adjustable Output Voltage

The TPS54350EVM-235 evaluation module allows the designer to evaluate the TPS54350 SWIFT DC/DC converter optimized for small size and low height. The inductor and capacitors selected allow a wide 6-18V input and a 3.3V output up to 3A. The output voltage can be easily adjusted for lower DSP and (...)

User guide: PDF | HTML
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Simulation model

TPS54350 TINA-TI Transient Reference Design

SLVM745.TSC (400 KB) - TINA-TI Reference Design
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Simulation model

TPS54350 TINA-TI Transient Spice Model

SLVM746.ZIP (56 KB) - TINA-TI Spice Model
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Simulation model

TPS54350 Unencrypted PSpice Transient Model Package (Rev. A)

SLVM337A.ZIP (43 KB) - PSpice Model
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Gerber file

Gerber File for TPS54350EVM

SLVC041.ZIP (106 KB)
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Gerber file

Gerber File for TPS5435xEVM

SLVC042.ZIP (157 KB)
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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HTSSOP (PWP) 16 View options

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