Product details


Vin (Min) (V) 2.95 Vin (Max) (V) 6 Vout (Min) (V) 0.8 Vout (Max) (V) 4.5 Iout (Max) (A) 2 Iq (Typ) (uA) 350 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2000 Features Enable, Frequency Synchronization, Power Good, Pre-Bias Start-Up, Synchronous Rectification, UVLO Adjustable, 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

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


  • Two, 30-mΩ (typical) MOSFETs for high-efficiency at 2-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 TPS54218 with the WEBENCH® Power Designer
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TheTPS54218 device is a full-featured, 6-V, 2-A, synchronous, step-down current-mode converter with two integrated MOSFETs.

The TPS54218 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 × 3-mm, thermally-enhanced QFN package.

The TPS54218 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

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Technical documentation

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Type Title Date
* Data sheet TPS54218 2.95-V to 6-V Input, 2-A Output, 2-MHz, Synchronous Step-Down SWIFT™ Converter datasheet (Rev. F) May 04, 2020
Application note Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems (Rev. A) Jul. 26, 2021
Application note Improving Efficiency at Higher Loads with High Switching Frequencies Jun. 16, 2021
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
Selection guide SWIFT DC/DC Converters Selector Guide (Rev. G) Feb. 06, 2019
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Application note Semiconductor and IC Package Thermal Metrics (Rev. C) Apr. 19, 2016
Technical article How to get started with current sense amplifiers – part 2 May 26, 2015
Technical article Power Tips: Current Mode Control Makes Compensating a Buck LED Regulator Easy Jan. 31, 2015
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
User guide TPS54218EVM-511 2-A, SWIFT Regulator Evaluation Module Sep. 23, 2009

Design & development

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

Hardware development

document-generic User guide
The TPS54218EVM-511 evaluation module is designed to demonstrate the small printed-circuit-board areas that may be achieved when designing with the TPS54218 regulator. The TPS54218EVM-511 is designed to provide up to 2A output current, from an input voltage of 3V to 6V (Vin start= 3.1V). The (...)

Design tools & simulation

SLIM220B.ZIP (118 KB) - PSpice Model
SLVM138.ZIP (62 KB) - TINA-TI Spice Model
SLVM139.TSC (193 KB) - TINA-TI Reference Design
SLVM507.ZIP (25 KB) - PSpice Model
SLVM530.ZIP (8 KB) - TINA-TI Spice Model
SLVM531.TSC (800 KB) - TINA-TI Reference Design
SLVMD99.ZIP (876 KB) - SIMPLIS Model
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 (...)
  • 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
  • (...)
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 (...)

Reference designs

Ultrasound smart probe power supply reference design
TIDA-010057 — Significant technological advancements and high degree of integration in Medical imaging, especially hand-held ultrasound smart probes, are pushing engineers to come up with highly-efficient, noise immune power solutions in a small size. This reference design documents end to end power and data (...)
document-generic Schematic document-generic User guide
3.3V Input -0.5V/0.9A Output Synchronous Buck-Boost Reference Design
PMP9166 This reference design uses the TPS54218 in a synchronous buck-boost configuration to generate a negative 0.5V output from a 3.3V input. Switching at 1MHz, the total solution size is extremely compact. An external LM4040 reference provides a precision pull-up voltage and is necessary to regulate the (...)

CAD/CAE symbols

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Ordering & quality

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