Buck converters (integrated switch)

Balance simplicity and flexibility with integrated-FET step-down voltage converters

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Because DC/DC step-down (buck) converters feature a controller with one or more integrated FETs and an external inductor, they offer a balance of flexibility and ease of use. Browse our comprehensive portfolio of DC/DC buck converters and leverage corresponding design tools to address power-supply design challenges for any application.

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Select by nominal input voltage

Battery

Buck converters intended to take input voltages from various battery chemistries, typically for portable personal electronics applications.

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< 6 V

Buck converters for common 3.3-V and 5-V intermediate buses and input voltage rails for personal electronics and other low-power systems.

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12 V

Buck converters for common 12-V input applications such as communications infrastructure, enterprise computing or 12-V automotive systems.

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24 V

Buck converters for a nominal 24-V input, with maximum operating input voltages as high as 100 V to protect against voltage transients. Common application areas are industrial and automotive.

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48 V

Buck converters for nominal 48-V input voltage systems such as telecommunications infrastructure and the emerging HEV and EV automotive space.

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New products

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LMR51420 NEW
LMR51420 ACTIVE

SIMPLE SWITCHER® power converter 4.5-V to 36-V, 2-A, synchronous buck with 40-µA IQ

Approx. price (USD) 1ku | 0.5
TPS62A02 NEW
TPS62A02 ACTIVE

2.5-V to 5.5-V input, 2-A high-efficiency step-down converter in SOT-563 package

Approx. price (USD) 1ku | 0.195
TPS62870-Q1 NEW
TPS62870-Q1 ACTIVE

Automotive 2.7-V to 6-V input, 6-A, stackable, synchronous buck converter

Approx. price (USD) 1ku | 1.498
TPS563300 NEW
TPS563300 ACTIVE

3.8-V to 28-V Input, 3-A synchronous buck converter in SOT-583 package

Approx. price (USD) 1ku | 0.553
TPS62933F NEW
TPS62933F ACTIVE

3.8-V to 30-V input, 3-A, 200-kHz to 2.2-MHz synchronous buck converter in SOT-583 package

Approx. price (USD) 1ku | 0.67
TPS62933P NEW
TPS62933P ACTIVE

3.8-V to 30-V, 3-A, 200-kHz to 2.2-MHz, low-IQ synchronous buck converter in SOT-583

Approx. price (USD) 1ku | 0.67
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Power trends

Power density

More power, less board space. This is the trend in applications across all markets as well as our step-down converter portfolio. High-density buck converters are a great choice for powering high-current digital loads like FPGAs and processors. Use our processor-attach tool to find the best products to complement your FPGA or processor.

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Application note
Understanding Flip Chip QFN (HotRod) and Standard QFN Performance Differences
This application report compares the performance of HotRod™ QFN and standard QFN packages using measurements taken with two very similar point-of-load buck converters.
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Video
Managing DC/DC thermals in high-current, high-ambient temperature applications
With its unparalleled thermal performance, the integrated-FET TPS546D24A buck converter produces a full 40 A at 85° C with smaller solution size and greater simplicity than multiphase controllers. 
Technical article
Which pinout is best? How individual, multifunctional and trimmed pinouts address design challenges.
As you weigh your options when selecting a device that meets your power needs, you no longer need to associate power density or ease of use with a limited feature set. This article explains what has changed.
Featured products for power density
TPS543620 ACTIVE 4-V to 18-V input, advanced current mode, 6-A synchronous SWIFT™ step-down converter
TPS62903 ACTIVE 3-V to 17-V, 3-A, high-efficiency and low IQ buck converter 1.5-mm × 2-mm QFN package
Low EMI

Mitigating buck converter EMI can be a major challenge for many power supply designers. Devices with built-in EMI reduction technologies reduce design time while helping with compliance to difficult standards such as CISPR 25 Class-5. Take a look below for some of our latest and best step-down converters for EMI performance. 

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Technical article
How device-level features and package options can help minimize EMI in automotive designs
While EMI does present design challenges, board layout constraints don’t automatically mean that you’re out of options. Learn about some device-level features and modern package types that offer reliable EMI mitigation techniques.
Video
Leverage TI’s online toolbox to tackle EMI before touching a soldering iron
In this training you will learn: what is EMI, how to optimize layout for EMI using the data sheet, and the impact of an input filter on conducted emissions. 
Analog Design Journal
Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics
This article identifies the significant role of power-stage inductive parasitics in EMI generation and offers suggestions for their minimization to reduce the broadband EMI signature.
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Featured products for low EMI
LMQ61460-Q1 ACTIVE Automotive 3-V to 36-V, 6-A low EMI synchronous step-down quiet converter with integrated capacitors
TPS62810-Q1 ACTIVE Automotive 2.75-V to 6-V, 4-A step-down converter in a 2mm x 3mm wettable-flanks QFN package
NEW LM61495 ACTIVE 10-A buck converter optimized for power density and low EMI
Low quiescent current (IQ)

DC/DC buck switching regulators with ultra-low-standby quiescent current increase light-load efficiency and extend battery life in portable and battery-operated applications. Find some of the lowest IQ products in our buck converter portfolio below including the TPS62x family of low-power converters with DCS control technology and the world's lowest IQ switching regulator, the TPS62840. 

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Video
Quiescent current parameters
Shutdown current. Non-switching current. No-load input current. What do these three things have in common? You’re likely to encounter them in a data sheet. Watch this video to learn the differences between these key parameters. 
Application note
Understanding Mode Transitions for LMR33620/30 and LMR36006/15
Learn how modern DC/DC converters utilize various modes of operation in order to optimize efficiency across a wide-input voltage range and output load current range.
document-pdfAcrobat PDF
Video
Understanding Quiescent Current Specifications
This training intends to explain the differences between key quiescent current terms and show you how standby quiescent current is calculated using values in the data sheet.
Featured products for low quiescent current (IQ)
TPS62840 ACTIVE 60-nA quiescent current (IQ), 1.8-V to 6.5-VIN, high-efficiency 750-mA step-down converter
NEW LMR43620-Q1 ACTIVE Automotive 3-V to 36-V, 2-A, low-IQ synchronous buck regulator
LM61460 ACTIVE 3-V to 36-V, 6-A, Low-EMI synchronous step-down converter
Low noise & precision

Typical switching regulators require a post-regulator LDO to power high-resolution ADCs and AFEs. But with the industry's best noise and ripple performance, TPS62912 and TPS62913 allow you to remove that low-noise LDO in most applications, saving PCB area and overall cost while improving system efficiency.

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Technical article
Minimize noise and ripple with a low-noise buck converter
An effective way to ensure low noise while controlling power loss is to eliminate the post-regulator LDO from your power-supply design and use a low-noise DC/DC buck converter. Read more to learn how.
Application note
Powering the AFE7920 with the TPS62913 Low-Ripple and Low-Noise Buck Converter (Rev. A)
Learn how to power the noise-sensitive rails of the AFE7920 without the need for a post-regulator LDO, reducing power losses, PCB area and solution cost.
document-pdfAcrobat PDF
Analog Design Journal
Reducing noise on the output of a switching regulator
This article presents several solutions to reduce noise generated by DC/DC converters and includes test data that illustrates the trade-offs between noise reduction and efficiency performance.
document-pdfAcrobat PDF
Featured products for low noise & precision
TPS62912 ACTIVE 17-VIN, 2-A low-noise and low-ripple buck converter with integrated ferrite bead filter compensation
TPS62913 ACTIVE 17-VIN, 3-A low-noise and low-ripple buck converter with integrated ferrite bead filter compensation

Technical resources

Selection guide
Selection guide
Buck Converter Quick Reference Guide (Rev. B)
Covering devices with input voltage up to 100 V and output current up to 40 A, this quick reference guide highlights our most popular buck converters across a wide variety of applications.
document-pdfAcrobat PDF
Video series
Video series
Power fundamentals - buck regulator architectures
This series provides an overview of buck regulator architectures, including: multiphase, hysteretic, COT, current or emulated current mode, and voltage mode. 
Selection guide
Selection guide
SWIFT DC/DC Converters Selector Guide (Rev. G)
Low on-resistance integrated MOSFETs, tight output voltage regulation accuracy, and an advanced feature-set allow SWIFT™ step-down converters to power the most advanced DSPs and FPGAs in the industry.
document-pdfAcrobat PDF

Design & development resources

Design tool
WEBENCH® Power Designer
WEBENCH® Power Designer creates customized power-supply circuits based on your requirements. The environment gives you end-to-end power-supply design capabilities that save you time during all phases of the design process.
Simulation tool
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 (...)
Design tool
Power Stage Designer™ Tool of Most Commonly Used Switch-mode Power Supplies
Power Stage DesignerTM is a JAVA-based tool (requires JAVA 8 or OpenJDK 8) that helps engineers accelerate their power-supply designs by calculating voltages and currents of 20 topologies according to the user’s inputs. Additionally, Power Stage Designer contains a Bode plotting tool and a (...)

Reference designs related to Buck converters (integrated switch)

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