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TPS54623

ACTIVE

4.5-V to 17-V, 6-A synchronous SWIFT™ buck converter with light load efficiency

Product details

Vin (min) (V) 4.5 Vin (max) (V) 17 Vout (min) (V) 0.6 Vout (max) (V) 15 Iout (max) (A) 6 Iq (typ) (mA) 0.25 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1600 Features Enable, Frequency synchronization, Light Load Efficiency, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, Tracking Operating temperature range (°C) -40 to 150 Rating Catalog Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 98 Type Converter
Vin (min) (V) 4.5 Vin (max) (V) 17 Vout (min) (V) 0.6 Vout (max) (V) 15 Iout (max) (A) 6 Iq (typ) (mA) 0.25 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 1600 Features Enable, Frequency synchronization, Light Load Efficiency, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, Tracking Operating temperature range (°C) -40 to 150 Rating Catalog Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 98 Type Converter
VQFN (RHL) 14 12.25 mm² 3.5 x 3.5
  • Integrated 26 mΩ, 19 mΩ MOSFETs
  • Split Power Rail: 1.6 V to 17 V on PVIN
  • 200 kHz to 1.6 MHz Switching Frequency
  • Light Load Efficient With Pulse Skip
  • Synchronizes to External Clock
  • 0.6 V ±1% Voltage Reference Overtemperature
  • Low 2-µA Shutdown Quiescent Current
  • Monotonic Start-Up into Pre-biased Outputs
  • –40°C to 150°C Operating Junction Temperature Range
  • Adjustable Slow Start and Power Sequencing
  • Power Good Output Monitor for Undervoltage and Overvoltage
  • Adjustable Input Undervoltage Lockout
  • Create a Custom Design Using the TPS54623 With the WEBENCH® Power Designer
  • Integrated 26 mΩ, 19 mΩ MOSFETs
  • Split Power Rail: 1.6 V to 17 V on PVIN
  • 200 kHz to 1.6 MHz Switching Frequency
  • Light Load Efficient With Pulse Skip
  • Synchronizes to External Clock
  • 0.6 V ±1% Voltage Reference Overtemperature
  • Low 2-µA Shutdown Quiescent Current
  • Monotonic Start-Up into Pre-biased Outputs
  • –40°C to 150°C Operating Junction Temperature Range
  • Adjustable Slow Start and Power Sequencing
  • Power Good Output Monitor for Undervoltage and Overvoltage
  • Adjustable Input Undervoltage Lockout
  • Create a Custom Design Using the TPS54623 With the WEBENCH® Power Designer

The TPS54623 in thermally enhanced VQFN package is a full featured 17-V, 6-A synchronous step-down converter which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. Further space savings are achieved through current mode control, which reduces component count, and by selecting a high switching frequency, reducing the inductor’s footprint.

The output voltage start-up ramp is controlled by the SS/TR pin, which allows operation as either a stand alone power supply or in tracking situations. Power sequencing is also possible by correctly configuring the enable and the open drain power good pins.

Cycle-by-cycle current limiting on the high-side FET protects the device in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. There is also a low-side sinking current limit that turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal hiccup protection disables the device when the die temperature exceeds the thermal shutdown temperature and enables the part again after the built-in thermal shutdown hiccup time. The TPS54623 operates at continuous current mode (CCM) at higher load conditions while skipping pulses to boost the efficiency at light loads.

The TPS54623 in thermally enhanced VQFN package is a full featured 17-V, 6-A synchronous step-down converter which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. Further space savings are achieved through current mode control, which reduces component count, and by selecting a high switching frequency, reducing the inductor’s footprint.

The output voltage start-up ramp is controlled by the SS/TR pin, which allows operation as either a stand alone power supply or in tracking situations. Power sequencing is also possible by correctly configuring the enable and the open drain power good pins.

Cycle-by-cycle current limiting on the high-side FET protects the device in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. There is also a low-side sinking current limit that turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal hiccup protection disables the device when the die temperature exceeds the thermal shutdown temperature and enables the part again after the built-in thermal shutdown hiccup time. The TPS54623 operates at continuous current mode (CCM) at higher load conditions while skipping pulses to boost the efficiency at light loads.

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Technical documentation

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Type Title Date
* Data sheet TPS54623 4.5-V to 17-V Input, 6-A Synchronous Step-Down SWIFT™ Converter With Light Load Efficiency and Hiccup Overcurrent Protection datasheet (Rev. C) PDF | HTML 10 Oct 2017
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25 Mar 2024
EVM User's guide TPS54623 Step-Down Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 23 Aug 2021
Application note Calculating Efficiency (Rev. A) 06 Mar 2020
Application note Minimizing Output Ripple During Startup (Rev. A) 20 May 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Minimizing Output Ripple During Startup 22 Jun 2017
Application note Understanding Thermal Dissipation and Design of a Heatsink 04 May 2011

Design & development

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

Evaluation board

TPS54623EVM-012 — Evaluation Module for TPS54623 Synchronous Step-Down SWIFT Converter

The TPS54623EVM-012 Evaluation Module is a fully assembled and tested circuit for evaluating the TPS54623 Synchronous Step-Down SWIFT™ Converter with hiccup overcurrent protection and high light-load efficiency. The TPS54623EVM-012 operates from a 8V to 17V input and provides a 3.3V output at 6A.
User guide: PDF | HTML
Not available on TI.com
Simulation model

TPS54623 TINA-TI Transient Reference Design

SLVM487.TSC (427 KB) - TINA-TI Reference Design
Simulation model

TPS54623 TINA-TI Transient Spice Model

SLVM486.ZIP (62 KB) - TINA-TI Spice Model
Simulation model

TPS54623 Unencrypted PSpice Average Model Package (Rev. A)

SLVM662A.ZIP (31 KB) - PSpice Model
Simulation model

TPS54623 Unencrypted PSpice Transient Model Package (Rev. A)

SLVM387A.ZIP (43 KB) - PSpice Model
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 (...)
Reference designs

PMP10774 — Reference Design - TPS54623 Synchronous Buck Converter with Vin=4.5V-17V, Vout=3.3V, Iout=5A

This synchronous buck converter design uses the TPS54623 to generate a 3.3V at 5A rail from a 4.5V-17Vdc source.  The current mode control and  high switching frequency of the device minimize the component count and size, resulting in a simple design. This supply achieves a peak efficiency of 96%.
Test report: PDF
Schematic: PDF
Package Pins Download
VQFN (RHL) 14 View options

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