Step-down switching regulators, also called buck converters, output a regulated voltage level that is less than the input voltage. Modern step-down switching regulators and controllers are available with internal architectures that are optimized for applications that have specific goals, such as power savings, high efficiency, or low cost.
The most modern step-down regulators and controllers offer high switching frequencies, very efficient internal switching elements, and built-in circuit protections.
Visit our switching regulators application page for selection information by application.
Learn about modern switching regulator technology to understand how to differentiate a modern switching regulator IC from those using older technology.
By Key Parameter
Recommended Step-Down Regulators, 5V Input
Recommended Step-Down Regulators, 12V Input
All Multi-Phase Step-Down Regulators
All Step-Down Power Modules with Integrated Inductor
All Step-Down Regulators
|Reference Circuit||960||Portable Supply Derives +5V and +3.3V Power from USB Port|
|System Board||5815||Palo Verde (MAXREFDES33#): Step-Down Converter|
|Reference Circuit||478||Current-Limit Circuit for the Buck Regulator|
|Reference Circuit||4381||MR-16 LED Driver with a 5V Auxiliary Output to Power a Pulsating LED Cooler|
|Reference Circuit||3430||A Triple-Output ±5% Regulated High Efficiency POE (Power over Ethernet) Supply|
|Reference Circuit||3241||USB Battery Charging Guide|
|Application Note||6071||Choose the Right Regulator for the Right Job: Part 3, Component Selection|
|Application Note||5999||Choose the Right Regulator for the Job: Part 2, Primary Regulator Control Schemes|
|Application Note||5998||Choose the Right Regulator for the Job: Part 1, Regulator Control Schemes|
|Application Note||5058||5A Step-Down Regulator Has I²C-Programmable Voltage Output|
|Application Note||3244||3mm-Tall, Dual-Phase, Step-Down, DC-DC Converter Delivers 1.6V at 20A from 12V for Mobile Processor Cores|
|Application Note||911||High-Efficiency Boost Converter Provides 48V for IP Phones|