降圧レギュレータ(DC-DC降圧スイッチング・レギュレータ)は、入力電圧を降圧し、安定した出力電圧を提供するDC-DCコンバータです。
STのモノリシック降圧レギュレータICは、最大61Vの入力電圧および最大4Aの出力電流を高いスイッチング周波数で供給します。STの幅広い製品ポートフォリオは、さまざまな市場ニーズを満たす高度に特化された製品で構成されています。
- 高耐圧、優れた信頼性と堅牢性、および省スペースを特徴とする産業および車載アプリケーション向け製品
- 高性能であらゆる負荷における高効率を実現するコンスーマおよびコンピュータ機器向け製品
STの降圧レギュレータは、過電流、過電圧、過熱保護などの包括的な保護機能を搭載しているため、MTBF(平均故障間隔)の延長、および外付け部品数の削減に貢献します。
小型で熱性能の高いパッケージ・オプションが幅広く用意されています。
幅広い降圧レギュレータ(降圧スイッチング・レギュレータ)を提供
幅広いアプリケーションに対応する降圧レギュレータの製品ラインアップをご紹介します。
低静止電流降圧レギュレータIC
STの低IQ降圧レギュレータは、バッテリ駆動機器や、低消費電力で長時間のスタンバイ動作を必要とする機器のような、電力要件の厳しいアプリケーションに適しています。産業および車載アプリケーションのバッテリ駆動時間を延長し、システム全体の消費電電力削減に貢献します。
産業アプリケーション向け降圧レギュレータ

信頼性が高く堅牢性に優れた降圧レギュレータです。産業アプリケーションをはじめ、幅広い入出力電圧が求められるアプリケーションに適しています。
産業用降圧レギュレータの製品ラインアップ車載アプリケーション向け降圧レギュレータ

STは、AEC-Q100に準拠した高性能かつ柔軟性の高い車載用降圧レギュレータを提供しています。
車載用降圧レギュレータの製品ラインアップ注目ビデオ
推奨コンテンツ
New Isolated Buck Converters Reduce Bill-of-Materials Costs in Automotive and Industrial Applications
Optimized for isolated buck regulator designs, the new A6986I and L6986I DC/DC converters boast a wide input-voltage range and low quiescent current to ensure robust and energy-efficient operation in automotive and industrial applications up to 5W.
The isolated buck topology drastically lowers the bill of materials in systems that require a regulated non-isolated primary voltage and one or more isolated secondary voltages.
Evaluation boards are also available to help developers build and verify their designs.
STEVAL-A6986IV1, STEVAL-A6986IV2
New 400 mA synchronous buck converters, with nano-quiescent current and very high efficiency, push performance beyond limits
Boasting a quiescent current of only 500 nA, ST’s miniaturized ST1PS01 and ST1PS02 step-down converters with digital voltage selection specifically address battery-powered and energy-harvesting applications, thanks also to their high efficiency over a wide range of operating conditions.
The integrated power switch and compensation network allow this new generation of step-down converters to work with only just a few external components.
Evaluation boards are available for both products, to support developers in their designs.
STEVAL-1PS01AJR ; STEVAL-1PS01DJR ; STEVAL-1PS01EJR ; STEVAL-1PS02B
New 61 V, 3 A step-down switching regulator for automotive application
Housed in a HTSSOP16-package, the A7987 is a 3 A step-down switching regulator with a wide input-voltage range, making it suitable for 24 V battery-powered applications.
Specifically recommended to design flexible and robust solutions, the A7987 also offers a set of additional functionalities including adjustable current limit, synchronization with a 180° phase shift, and power sequencing.
These key features ensure flexible and stable performance when several voltage rails are powered up in automotive applications such as body infotainment and telematics.
Large selection of step-down DC-DC regulators with synchronous rectification
In the quest for higher efficiency and compact form factor in their DC-DC supply designs, engineers now have a few more allies: the L6985F, L6986F and L6986 step-down DC-DC regulators with synchronous rectification and an output current of 0.5 A, 1,5 A and 2 A respectively.
Based on a peak current mode architecture with a p-channel power MOSFET, they feature a selectable low-consumption-mode (LCM burst mode) to increase efficiency at light load, and a low-noise-mode (LNM with fixed PWM switching frequency) for noise-sensitive designs.
An easy-to-use evaluation board (STEVAL-ISA156V1) based on the L6986 regulator is available to help you configure and evaluate application parameters so you can reach higher efficiency, higher power density and lower standby power designs.
- L5983 1.5 A step-down switching regulator
- L5985 2 A step-down switching regulator
- A7987 61 V 3A asynchronous step-down switching regulator with adjustable current limitation for automotive
- ST1PS03 400 mA nano-quiescent synchronous step-down converter with digital voltage selection, Power Good and independent Load Switch
- ST1PS01 400 mA nano-quiescent synchronous step-down converter with digital voltage selection and Power Good
- L5980 0.7 A step-down switching regulator
- ST1S09 2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectification
- L5981 1 A step-down switching regulator
- A5972D Up to 1.5 A step-down switching regulator for automotive applications
- A5973AD Up to 1.5 A step-down switching regulator for automotive applications
- L7983 60 V 300 mA synchronous step-down switching regulator with 10 µA quiescent current
- A5970AD Up to 1 A step down switching regulator for automotive applications
- A5970D Up to 1 A step-down switching regulator for automotive applications
- L6983 38 V, 3 A synchronous step-down converter with 17 µA quiescent current
- A5973D Up to 2 A step down switching regulator for automotive applications
- A6902D Up to 1 A step down switching regulator with adjustable current limit for automotive applications
- L5973D Up to 2 A step down switching regulator
- AST1S31HF Up to 4 V, 3 A step-down 2.3 MHz switching regulator for automotive applications
- ST1S14 Up to 3 A step-down switching regulator
- L5972D 2A switch step down switching regulator
- L7981 3 A step-down switching regulator
- ST1S30 3 A, 1.5 MHz PWM step-down switching regulator with synchronous rectification
- L7980 2 A step-down switching regulator
- ST1S31 3 A DC step-down switching regulator
- L6984 36 V, 400 mA synchronous step-down switching regulator
- L6986 38 V, 2 A synchronous step-down switching regulator with 30 µA quiescent current
- PM8903A 3 A step-down monolithic switching regulator
- L4964 High current switching regulator
- L6986I 38 V, 5W synchronous iso-buck converter
- A6986I Automotive 38 V, 5W synchronous iso-buck converter
- L5988D 4 A continuous (more than 5 A pulsed) step-down switching regulator with synchronous rectification
- A5974D Up to 2.5 A step down switching regulator for automotive applications
- L6986H 38 V, 2 A synchronous step-down switching regulator with 30 µA quiescent current
- L296 HIGH CURRENT SWITCHING REGULATORS
- L5970D Up to 1 A step down switching regulator
- AST1S31 Up to 4 V, 3 A step-down 1.5 MHz switching regulator for automotive applications
- L4978 2A Step down switching regulator
- L7987 61 V 3 A asynchronous step-down switching regulator with adjustable current limitation
- ST1S50 4 A Monolithic synchronous step-down converter with high efficiency at light load
- STPD01 Programmable Buck Converter for USB Power Delivery
- L5973AD 2 A switch step down switching regulator
- A6986F Automotive 38 V, 1.5 A synchronous step-down switching regulator with 30 µA quiescent current
- L6986F 38 V, 1.5 A synchronous step-down switching regulator with 30 µA quiescent current
- ST1S15 500 mA, 6 MHz synchronous step-down converter
- ST1PS02 400 mA nano-quiescent synchronous step-down converter with digital voltage selection, Power Good and AUX switch
- L4976 1 A step down switching regulator
- A5974AD Up to 2 A step-down switching regulator for automotive applications
- A5975D Up to 3 A step down switching regulator for automotive applications
- A6984 36 V 400 mA synchronous step-down switching regulator
- A5975AD Up to 2.5 A step down switching regulator for automotive applications
- ST1S03 1.5 A, 1.5 MHz adjustable, step-down switching regulator
- L4973 3.5 A step down switching regulator
- ST1S10 3 A, 900 kHz, monolithic synchronous step-down regulator IC
- L4974A 3.5 A switching regulator
- L4971 1.5A Switching Regulator
- ST1S06 Synchronous rectification with inhibit, 1.5 A, 1.5 MHz fixed or adjustable, step-down switching regulator
- L4970A 10 A switching regulator
- L4963 1.5 A SWITCHING REGULATOR
- ST1S12XX Synchronous rectification with enable, 0.7 A, 1.7 MHz fixed or adjustable step-down switching regulator in TSOT23-5L
- A7986A 3 A step-down switching regulator for automotive applications
- A7985A 2 A step-down switching regulator for automotive applications
- L4972 2 A SWITCHING REGULATOR
- ST1S40 3 A DC step-down switching regulator
- L6926 High efficiency monolithic synchronous step-down regulator
- ST2S08B Dual synchronous rectification, 1.5 A, 1.5 MHz adjustable step-down switching regulator
- L4975A 5 A switching regulator
- L6981 38 V, 1.5 A synchronous step-down converter with low quiescent current
- L5986 2.5 A step-down switching regulator
- L5987 3 A step-down switching regulator
- L5970AD Up to 1 A step down switching regulator
- A6986 38 V, 2 A synchronous step-down switching regulator with 30 µA quiescent current
- A6985F Automotive 38 V, 500 mA synchronous step-down switching regulator with 30 µA quiescent current
- L6985F 38 V, 500 mA synchronous step-down switching regulator with 30 µA quiescent current
- L7987L 61 V 2 A asynchronous step-down switching regulator with adjustable current limitation
- PM8908 Monolithic buck converter for DDR memory termination
- ST1S32 4 A DC step-down switching regulator
- L6902 Up to 1 A switching regulator with adjustable current limit
- ST1S41 4 A step-down switching regulator
- ST2S06 Dual synchronous rectification with reset or inhibit, 0.5 A, 1.5 MHz adjustable step-down switching regulator
- L7985 2 A step-down switching regulator
- L7986TA 3 A step-down switching regulator
- L6982 38 V, 2 A synchronous step-down converter with low quiescent current
- L3751 Wide 6 V to 75 V input voltage synchronous buck controller
- L7986 3 A step-down switching regulator
- L6928 High efficiency monolithic synchronous step-down regulator
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.