DC/DC buck converters
DC/DC voltage conversion that balances simplicity and flexibility
Because 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. Both non-synchronous (integrated high-side FET and external diode) and synchronous (integrated high-side and low-side FETs) converters simplify the design process by reducing external component count. At the same time, having control over the selection of an external inductor allows you to optimize your power supply for efficiency, size, or cost. No matter what your application is, we have a DC/DC buck converter and design tools to help you address your power supply design challenges.
Search by nominal input voltage
Battery
DC/DC buck converter ICs intended to take input voltages from various battery chemistries, typically for portable personal electronics applications.
< 6 V
3.3 V and 5 V are common intermediate buses and are also popular input rails for personal electronics and other low-power systems.
12 V
DC/DC step-down converters for common 12-V input applications like communications infrastructure, enterprise computing, or 12-V automotive systems.
24 V
DC/DC buck converters targeting a nominal 24-V input, with maximum operating input voltages as high as 100 V to protect against voltage transients. Common application areas needing 24 V are broad industrial and 24-V automotive.
48 V
DC/DC step-down converters for nominal 48-V input voltage systems like telecommunications infrastructure and the emerging HEV/EV automotive space.
Featured products
TPS62840
1.8-V to 6.5-VIN, high-efficiency 750-mA step-down converter with world's lowest quiescent current at 60-nA
Browse by key design characteristics
Low EMI
Mitigating buck converter EMI is a major challenge for many power supply designers. Devices with built-in EMI reduction technologies save design time and headaches and help you comply with difficult standards like CISPR 25 Class-5. Take a look at the table below for some of the latest and best step-down converters for excellent EMI performance. For more help with EMI mitigation, explore our EMI training hub.
| Part Number | Input Voltage Range (V) | Output Current (A) | EMI Technology | Datasheet |
|---|---|---|---|---|
| LM61460-Q1 | 3.0 to 36 | 6 | View | |
| TPS62810-Q1 | 2.75 to 6 | 4 | Spread spectrum | View |
| LM73605 | 3.5 to 36 | 5 | EMI-optimized pin-out | View |
High power density
More power, less board space. This is the trend for many applications as well as the TI step-down converter portfolio. Highlighted by the SWIFT™ family, these highly-integrated regulators feature high performance and high output current capability in compact, thermally-enhanced packaging.
High-density regulators are a great choice for powering high-current digital loads like FPGAs and processors. Use our processor-attach tool to find the best devices to surround your FPGA or processor.
| Part Number | Input Voltage Range (V) | Output Current (A) | Package Type and Size (mm) | Datasheet |
|---|---|---|---|---|
| TPS546D24A | 2.95 to 16 | 40 (stackable to 160A) | QFN-40 (5 x 7) | View |
| TPS543C20A | 4 to 16 | 40 (stackable to 80A) | QFN-40 (5 x 7) | View |
| TPS62866 | 2.4 to 5.5 | 6 | WCSP-15 (1.05 x 1.78) | View |
Low quiescent current
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 devices in TI's buck converter portfolio below, including the world's lowest IQ regulator, TPS62840. Keep in mind that quiescent current is dependent upon input voltage range, so what is low for 60V input may be very different from what is considered low for 5VIN.
Wide input voltage
Wide VIN devices feature a maximum input voltage of greater than 30V and are typically deployed in nominal 12V, 24V, and 48V systems where high input voltage transients are common. With their additional headroom, wide input voltage ranges allow you to shrink or eliminate bulky and costly transient suppression circuitry. Explore the entire collection of Wide VIN power supply devices, including DC/DC converters, controllers, modules, and LDOs.
Ease of use
The SIMPLE SWITCHER® family of DC/DC power converters has been designed for ease of use from the ground up. Common features include integration of FET(s) and compensation, low component count, packaging with visual inspection capability, and powerful design tools like WEBENCH®.
Featured DC/DC buck converter resources
Fully tested reference designs and test reports to help kick-start your design process.
Explore the wealth of training videos on various DC/DC buck converter topics.
Discover, design, and simulate with the world's most powerful online design environment.
Receive fast and reliable technical support from our engineers throughout every step of your buck converter design.
Complementary products
eFuses
Protect your buck converter against overvoltage, short circuit, inrush current control, and reverse polarity events.
Sequencers
Manage power-up and power-down of multiple buck converters to guarantee reliable operation, better efficiency, and overall system health.
Supervisors
Monitor your buck converter for undervoltage or overvoltage conditions to alert the system when a voltage rail deviates from the permissible tolerance level.
DDR
Choose from our large and diverse portfolio of DDR terminators to pair with your buck converter and fit your system requirements.