降压转换器（也称为降压调节器或DC-DC步降开关稳压器）是一种输出稳压比输入电压低的DC-DC转换器。
意法半导体的单片式降压（降压）转换器IC具有高达61 V的输入电压能力，以很高的开关频率实现了高达4 A的输出电流。
为了提高MTBF（平均无故障时间）并减少外部元件，从而降低物料成本，这些降压稳压器都嵌入了全套保护功能（过流、过压和过热）。
单片式降压转换器IC（降压调节器）可满足任何应用需求
应用
降压转换器可用于大量的应用场景。
产品型号：如何选择合适的降压转换器
了解意法半导体为满足广泛的需求而推出的各种降压转换器。
意法半导体的DC-DC产品组合提供了合适的解决方案，能够以较少的设计投入获得具有良好稳压性能的电源轨。此外，设计只需少数几个外部元件，以及内部补偿和同步整流，不会影响性能和特性。
可调回路带宽、外部时钟同步和可调软启动是一些关键特性，允许为最终应用设计量身定制的解决方案。
在必须具有低功耗的系统中（如电池或总线供电应用），在系统大部分时间处于空闲状态的情况下，降压转换器需要非常高效。
低功耗降压转换器在轻负载下具有超低电流和高效率，可满足这些应用要求。
低功耗降压转换器在轻负载下具有超低电流和高效率，可满足这些应用要求。
相比线性稳压器，降压转换器在效率方面具有显著优势。
然而，它们也引入了开关噪声，可能成为符合EMI标准的巨大障碍，并干扰对噪声敏感的应用。
低噪音降压转换器帮助设计人员应对这些挑战。
然而，它们也引入了开关噪声，可能成为符合EMI标准的巨大障碍，并干扰对噪声敏感的应用。
低噪音降压转换器帮助设计人员应对这些挑战。
孤立式降压拓扑的主要应用目标是获得浮动电压源。在大功率DC-DC转换器、逆变器、电机驱动器和其他工业应用中，通常需要为高侧栅极驱动器提供电源。
宽输入电压降压转换器适用于非稳压输入电压或受强线路瞬变影响的母线电压，这种情况经常出现在工业和电信系统中。
较短导通时间确保实现大输入输出转换比，同时保持高开关频率。
较短导通时间确保实现大输入输出转换比，同时保持高开关频率。
优点
- 高压技术，加上高可靠性、耐用性、紧凑性
- 任何负载下的高效率以及消费类和计算机产品所需的高性能
特别推荐
About buck converters
How does a buck converter works ?
A buck converter usually uses two switches and an inductor to make a voltage controlled current source that interacts with the parallel combination of output capacitor and load, to generate the desired output voltage (VOUT < VIN).
Where and why is a buck converter used ?
A Buck converter is used to step down the voltage of a given input to achieve the required output voltage.
Buck converters can be used in many applications including smartphones, tablets, battery-powered equipment, industrial power systems and point-of-load supplies.
What are the advantages of a buck converter ?
Buck converters offer a more efficient solution with fewer, smaller external components. They can step-down voltages using a minimal number of components while also offering a lower operating duty cycle and higher efficiency across a wide range of input and output voltages.
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eDesignSuite
eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.
Power Management Design Center
Choose design tool: 
SMPS design, by topology, by type and by product PFC design with analog and digitial control Supports various PCB configurations 
Handles AC-DC and DC-DC design in common topologies Displays interactive and annotated schematic Provides current/voltage graphs, Bode plots, efficiency curves and power-loss data 
Provides a step-by-step optimized design of power section and control loop Generates the STM32Cube embedded software package for custom applications and allows firmware project generation, compatible with multiple STM32 IDEs 
Specify input/output power for each node in the tree Check for consistency Design each individual node
Power Supply Design Tool
SMPS design, by topology, by type and by product PFC design with analog and digitial control Supports various PCB configurations Choose type: DC/DC AC/DC 太阳能电池充电器
LED Lighting Design Tool
Handles AC-DC and DC-DC design in common topologies Displays interactive and annotated schematic Provides current/voltage graphs, Bode plots, efficiency curves and power-loss data Choose type: DC/DC AC/DC
Digital Power Workbench
Provides a step-by-step optimized design of power section and control loop Generates the STM32Cube embedded software package for custom applications and allows firmware project generation, compatible with multiple STM32 IDEs Power Tree Designer
Specify input/output power for each node in the tree Check for consistency Design each individual node Power Supply Design Tool
Power Supply Design Tool
Active Filters
Comparators
Current Sensing
LED Lighting Design Tool
Rectifier Diodes Simulator
STPOWER Studio
AC Switches Simulator
Power Supply Design Tool
TVS Simulator
Power Supply Design Tool
LED Lighting Design Tool
NFC Tuning Circuit
NFC Inductance