TPS54618

ACTIVE

2.95V to 6V Input, 6A, Synchronous Step-Down SWIFT™ Converter

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Product details

Parameters

Vin (Min) (V) 2.95 Vin (Max) (V) 6 Vout (Min) (V) 0.8 Vout (Max) (V) 4.5 Iout (Max) (A) 6 Iq (Typ) (uA) 515 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2000 Features Enable, Frequency Synchronization, Power Good, Pre-Bias Start-Up, Synchronous Rectification, Tracking, UVLO 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

WQFN (RTE) 16 9 mm² 3 x 3 open-in-new Find other Buck converters (integrated switch)

Features

  • Two 12-mΩ (typical) MOSFETs for high efficiency at 6-A loads
  • 300-kHz to 2-MHz switching frequency
  • 0.8-V ±1% Voltage reference over temperature (–40°C to +150°C)
  • Synchronizes to external clock
  • Adjustable slow start and sequencing
  • UV and OV power-good output
  • –40°C to 150°C Operating Junction Temperature Range
  • Thermally enhanced 3-mm × 3-mm, 16-pin WQFN package
  • Pin-Compatible to TPS54418
  • Create a custom design using the TPS54618 with the WEBENCH® Power Designer

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Description

The TPS54618 device is a full-featured 6-V, 6-A, synchronous step-down current-mode converter with two integrated MOSFETs.

The TPS54618 enables small designs by integrating the MOSFETs, implementing current-mode control to reduce external component count, reducing inductor size by enabling up to 2-MHz switching frequency, and minimizing the IC footprint with a small, 3-mm × 3-mm, thermally-enhanced WQFN package.

The TPS54618 provides accurate regulation for a variety of loads with an accurate ±1% voltage reference (VREF) over temperature.

Efficiency is maximized through the integrated
12-mΩ MOSFETs and 515-µA typical supply current. Using the enable pin, shutdown supply current is reduced to 5.5-µA by entering a shutdown mode.

Undervoltage lockout is internally set at 2.6 V, but can be increased by programming the threshold with a resistor network on the enable pin. The output-voltage start-up ramp is controlled by the slow-start pin. An open-drain power-good signal indicates the output is within 93% to 107% of its nominal voltage.

Frequency foldback and thermal shutdown protect the device during an overcurrent condition.

For more SWIFT™ documentation, see the TI website at www.ti.com/swift.

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Technical documentation

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Type Title Date
* Data sheet TPS54618 2.95-V to 6-V, 6-A, Synchronous Step-Down SWIFT Converter datasheet (Rev. F) May 24, 2019
Selection guide Buck Converter Quick Reference Guide (Rev. B) Apr. 08, 2021
Application note Calculating Efficiency (Rev. A) Mar. 06, 2020
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application note Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems Sep. 10, 2018
Application note Solve Point-of-Load Power Design Challenges: Single Board Computer Applications Aug. 24, 2018
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application note Semiconductor and IC Package Thermal Metrics (Rev. C) Apr. 19, 2016
User guide TPS54618EVM-606, 6-A SWIFT Regulator Evaluation Module (Rev. A) Mar. 05, 2012
Application note Understanding Thermal Dissipation and Design of a Heatsink May 04, 2011
Application note Designing Type III Compensation for Current Mode Step-Down Converters (Rev. A) Sep. 15, 2010

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
49
Description
The TPS54618EVM-606 is a fully assembled and tested curcuit for evaluating the TPS54618 6A, 2MHz Synchronous Step-Down SWIFT DC/DC Converter. The TPS54618EVM-606 operates from a 3V to 6V input and delivers a 1.8V output at 6A. The same board may be modified to provide different output voltages. See (...)
Features
  • 2.95V to 6V operation
  • Current mode control
  • Synchronizes to External Clock
  • 250uA No load quiescent operating current (no switching)
  • 200kHz to 2MHz externally set frequency
  • Low drop out, 98% max. duty cycle
  • +/-1% VSENSE reference over temp
  • 0.8V Internal Voltage Reference
  • Power Good output
  • Stable Operation with (...)

Design tools & simulation

SIMULATION MODEL Download
SLVM349B.ZIP (50 KB) - PSpice Model
SIMULATION MODEL Download
SLVM546A.ZIP (78 KB) - PSpice Model
SIMULATION MODEL Download
SLVM550.ZIP (7 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SLVM551.TSC (217 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SLVM675.ZIP (64 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SLVM676.TSC (895 KB) - TINA-TI Reference Design
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
  • (...)
CALCULATION TOOL Download
TPS54620 & TPS54XXX Current-Mode Step-Down Converter Design Calculator
TPS54620DESIGN-CALC — The Design Calculator Plus Application Note (SLVA352A) Calculator Tool calculates the critical external component values for the TPS54620/TPS54622/TPS54521/TPS54320/TPS54618/TPS54418/TPS54318/TPS54218/TPS54319. The calculator includes power stage design, feature design and Type II and Type III (...)
SCHEMATIC Download
SLTR028.PDF (38 KB)

CAD/CAE symbols

Package Pins Download
WQFN (RTE) 16 View options

Ordering & quality

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  • Ongoing reliability monitoring

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