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Product details

Parameters

Vin (Min) (V) 4.5 Vin (Max) (V) 17 Vout (Min) (V) 0.6 Vout (Max) (V) 15 Iout (Max) (A) 6 Iq (Typ) (uA) 250 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 1600 Features Enable, Frequency Synchronization, Light Load Efficiency, Power Good, Pre-Bias Start-Up, Synchronous Rectification, Tracking, Soft Start Adjustable Operating temperature range (C) -40 to 150 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

VQFN (RHL) 14 12 mm² 3.5 x 3.5 open-in-new Find other Buck converters (integrated switch)

Features

  • 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

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Description

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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Similar but not functionally equivalent to the compared device:
TPS54824 ACTIVE 4.5V to 17V Input, Current Mode, 8A Synchronous SWIFT™ Step-Down Converter This product is an 8-A converter with better efficiency in a high-power density HotRod™ QFN package.

Technical documentation

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Type Title Date
* Datasheet 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) Oct. 10, 2017
Application note Calculating Efficiency (Rev. A) Mar. 06, 2020
Application note Minimizing Output Ripple During Startup (Rev. A) May 20, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application note Minimizing Output Ripple During Startup Jun. 22, 2017
Application note Semiconductor and IC Package Thermal Metrics (Rev. C) Apr. 19, 2016
User guide TPS54623EVM-012, 6-A, SWIFT™ Regulator Evaluation Module Sep. 06, 2011
Application note Understanding Thermal Dissipation and Design of a Heatsink May 04, 2011

Design & development

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

Hardware development

EVALUATION BOARD Download
25
Description
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.
Features
  • Integrated Monolithic 26mW High Side and 19mW Low Side FETs
  • 200KHz to 1.6MHz Adjustable Switching Frequency
  • 0.6V Reference
  • Light Load Efficiency with Pulse Skipping
  • Synchronizes to External Clock
  • Integrated Tracking Function
  • Hiccup Current Limiting Reduces Power Consumption during Short-Circuit

Design tools & simulation

SIMULATION MODEL Download
SLVM387A.ZIP (43 KB) - PSpice Model
SIMULATION MODEL Download
SLVM486.ZIP (62 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SLVM487.TSC (427 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SLVM662A.ZIP (31 KB) - PSpice Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

REFERENCE DESIGNS Download
Reference Design - TPS54623 Synchronous Buck Converter with Vin=4.5V-17V, Vout=3.3V, Iout=5A
PMP10774 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%.
document-generic Schematic

CAD/CAE symbols

Package Pins Download
VQFN (RHL) 14 View options

Ordering & quality

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  • Lead finish/Ball material
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  • Qualification summary
  • Ongoing reliability monitoring

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