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TPS54318

ACTIVE

2.95V to 6V Input, 3A Synchronous Step-Down SWIFT™ Converter

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Data sheet

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TPS62813-Q1 ACTIVE Automotive 2.75-V to 6-V, 3-A step-down converter with fixed Fsw and SYNC in 2x3mm wettable-flanks Smaller solution size and high accuracy.

TPS54318

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 2.95 Vin (max) (V) 6 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2000 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, UVLO adjustable Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 4.5 Iq (typ) (µA) 350 Duty cycle (max) (%) 98
Rating Catalog Operating temperature range (°C) -40 to 150 Topology Buck Type Converter Iout (max) (A) 3 Vin (min) (V) 2.95 Vin (max) (V) 6 Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2000 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Synchronous Rectification, UVLO adjustable Control mode current mode Vout (min) (V) 0.8 Vout (max) (V) 4.5 Iq (typ) (µA) 350 Duty cycle (max) (%) 98
WQFN (RTE) 16 9 mm² 3 x 3
  • Two, 30-mΩ (typical) MOSFETs for High-Efficiency at 3-A loads
  • Switching Frequency: 200 kHz to 2 MHz
  • Voltage Reference Over Temperature: 0.8 V ± 1%
  • Synchronizes to External Clock
  • Adjustable Soft Start/Sequencing
  • UV and OV Power-Good Output
  • Low Operating and Shutdown Quiescent Current
  • Safe Start-Up into Prebiased Output
  • Cycle-by-Cycle Current Limit, Thermal and Frequency Foldback Protection
  • Operating Junction Temperature Range: –40°C to 150°C
  • Thermally Enhanced 3 mm × 3 mm 16-pin WQFN Package
  • Create a Custom Design Using the TPS54318 With the WEBENCH® Power Designer
  • Two, 30-mΩ (typical) MOSFETs for High-Efficiency at 3-A loads
  • Switching Frequency: 200 kHz to 2 MHz
  • Voltage Reference Over Temperature: 0.8 V ± 1%
  • Synchronizes to External Clock
  • Adjustable Soft Start/Sequencing
  • UV and OV Power-Good Output
  • Low Operating and Shutdown Quiescent Current
  • Safe Start-Up into Prebiased Output
  • Cycle-by-Cycle Current Limit, Thermal and Frequency Foldback Protection
  • Operating Junction Temperature Range: –40°C to 150°C
  • Thermally Enhanced 3 mm × 3 mm 16-pin WQFN Package
  • Create a Custom Design Using the TPS54318 With the WEBENCH® Power Designer

TheTPS54318 device is a full-featured, 6-V, 3-A, synchronous, step-down current-mode converter with two integrated MOSFETs.

The TPS54318 device 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 device footprint with a small, 3 mm x 3 mm, thermally enhanced, QFN package.

The TPS54318 device provides accurate regulation for a variety of loads with an accurate ±1% voltage reference (VREF) over temperature.

Efficiency is maximized through the integrated 30-mΩ MOSFETs and a 350-µA typical supply current. Using the EN pin, shutdown supply current is reduced to 2 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 startup ramp is controlled by the soft-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 protects the device during an overcurrent condition.

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

TheTPS54318 device is a full-featured, 6-V, 3-A, synchronous, step-down current-mode converter with two integrated MOSFETs.

The TPS54318 device 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 device footprint with a small, 3 mm x 3 mm, thermally enhanced, QFN package.

The TPS54318 device provides accurate regulation for a variety of loads with an accurate ±1% voltage reference (VREF) over temperature.

Efficiency is maximized through the integrated 30-mΩ MOSFETs and a 350-µA typical supply current. Using the EN pin, shutdown supply current is reduced to 2 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 startup ramp is controlled by the soft-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 protects 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 TPS54318 2.95-V to 6-V Input, 3-A Output, 2-MHz, Synchronous Step-Down SWIFT™ Converter datasheet (Rev. C) PDF | HTML 06 Apr 2018
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25 Mar 2024
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
Application note Calculating Efficiency (Rev. A) 06 Mar 2020
Selection guide SWIFT DC/DC Converters Selector Guide (Rev. G) 06 Feb 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Understanding Thermal Dissipation and Design of a Heatsink 04 May 2011
Application note Designing Type III Compensation for Current Mode Step-Down Converters (Rev. A) 15 Sep 2010
User guide TPS54318EVM-512 3-A, SWIFT Regulator Evaluation Module 23 Sep 2009

Design & development

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

Simulation model

TPS54318 TINA-TI Transient Reference Design

SLVM651.TSC (172 KB) - TINA-TI Reference Design
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Simulation model

TPS54318 TINA-TI Transient Spice Model

SLVM652.ZIP (63 KB) - TINA-TI Spice Model
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Simulation model

TPS54318 Unencrypted PSpice Average Model Package (Rev. A)

SLVM897A.ZIP (36 KB) - PSpice Model
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Simulation model

TPS54318 Unencrypted PSpice Transient Model Package (Rev. A)

SLVM640A.ZIP (54 KB) - PSpice Model
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Calculation tool

TPS54620DESIGN-CALC — TPS54620 and TPS54XXX Current-Mode Step-Down Converter Design Calculator

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 (...)
Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC converters (integrated FET)
TPS54218 — 2.95V to 6V Input, 2A Synchronous Step-Down SWIFT™ Converter TPS54318 — 2.95V to 6V Input, 3A Synchronous Step-Down SWIFT™ Converter TPS54319 — 2.95 V to 6 V input, 3 A, 2 MHz SWIFT™ synchronous step-down converter in a 3 mm x 3 mm QFN package TPS54320 — 4.5V to 17V Input, 3A Synchronous Step-Down SWIFT™ Converter TPS54418 — 2.95V to 6V Input, 4A Synchronous Step-Down SWIFT™ Converter TPS54521 — 17V Input, 5A Synchronous Step-Down Converter TPS54618 — 2.95V to 6V Input, 6A, Synchronous Step-Down SWIFT™ Converter TPS54620 — 4.5-V to 17-V, 6-A synchronous SWIFT™ buck converter TPS54622 — 4.5-V to 17-V, 6-A synchronous SWIFT™ buck converter with hiccup current limit TPS54821 — 4.5-V to 17-V, 8-A synchronous buck converter with hiccup current limit TPS56921 — 4.5-V to 17-V, 9-A synchronous buck converter with VID control
Hardware development
Evaluation board
TPS54418EVM-375 — TPS54418 3.3V Input, 1.8V Output, 4A SWIFT™ Evaluation Module TPS54620EVM-374 — TPS54620 8V to 17V, 6A SWIFT™ Converter Evaluation Module
Software
Calculation tool
TPS54620DESIGN-CALC — TPS54620 & TPS54XXX Current-Mode Step-Down Converter Design Calculator
Download
Schematic

High Performance, Cost Effective, TPS54318 Solution for Cyclone IV: 3.3 and 5-V

SLTR012.PDF (50 KB)
Download
Schematic

Power Distribution for Altera Arria II GX, Option 2

SLTR028.PDF (38 KB)
Download
Reference designs

TIDA-01021 — Multi-channel JESD204B 15-GHz clocking reference design for DSO, radar and 5G wireless testers

High speed multi-channel applications require precise clocking solutions capable of managing channel-to-channel skew in order to achieve optimal system SNR, SFDR, and ENOB. This reference design is capable of supporting two high speed channels on separate boards by utilizing TI’s LMX2594 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01023 — High Channel Count JESD204B Clock Generation Reference Design for RADAR and 5G Wireless Testers

High-speed multi-channel applications require low noise and scalable clocking solutions capable of precise channel-to-channel skew adjustment to achieve optimal system SNR, SFDR, and ENOB. This reference design supports high channel count JESD204B synchronized clocks using one master and multiple (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01024 — High Channel Count JESD204B Daisy Chain Clock Reference Design for RADAR and 5G Wireless Testers

High-speed multi-channel applications require low noise and scalable clocking solutions capable of precise channel-to-channel skew adjustment to achieve optimal system SNR, SFDR, and ENOB. This reference design supports scaling up JESD204B synchronized clocks in daisy chain configuration. This (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-010131 — Multichannel RF transceiver clocking reference design for RADARs and wireless 5G testers

Analog front end for high-speed end equipments like phased-array radars, wireless communication testers, and electronic warfare require synchronized, multipletransceiver signal chains. Each transceiver signal chain includes high-speed, analog-to-digital converters (ADCs), digital-to-analog (...)
Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
WQFN (RTE) 16 Ultra Librarian
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