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、高いスイッチング周波数で61Vの最大入力電圧と、4Aの最大出力電流を供給します。STの幅広いポートフォリオは、様々な市場の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。
- 産業および車載アプリケーション向けの高耐圧技術、高い信頼性、堅牢性、および省スペース
- コンスーマおよびコンピュータ製品向けに、高い性能レベルとあらゆる負荷における高効率を実現
STの降圧レギュレータは、包括的な保護機能(過電流、過電圧、過熱からの保護)を内蔵することでMTBF(平均故障間隔)を延ばすとともに、外付け部品数を削減しています。
いずれもコンパクトで熱性能の高いパッケージ・オプションが多数用意されています。
様々な降圧レギュレータ(降圧スイッチング・レギュレータ)
幅広いアプリケーションに対応する、STの降圧レギュレータの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、バッテリ駆動式の機器や、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。産業用および車載用アプリケーションのバッテリ駆動時間を伸ばし、全体として消費電力の削減に貢献します。
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。産業用アプリケーションや、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は高性能かつ柔軟性の高いAEC-Q100準拠の降圧レギュレータを、車載アプリケーション向けに提供しています。
車載用降圧レギュレータの製品ラインアップ
ビデオ
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 Up to 1.5 A step down switching regulator
- L5985 Up to 2 A step down switching regulator
- A7987 61 V 3A asynchronous step-down switching regulator with adjustable current limitation for automotive
- ST1PS01 400mA Nano-Quiescent Synchronous step-down converter with digital voltage selection and power good
- L5980 Up to 0.7 A step down switching regulator
- ST1S09 Synchronous rectification with inhibit, 2 A, 1.5 MHz adjustable, step-down switching regulator
- L5981 Up to 1 A step down switching regulator
- A5972D Up to 1.5 A step down switching regulator for automotive applications
- L4960 2.5 A Switching Regulator
- A5973AD Up to 1.5 A step down switching regulator for automotive applications
- 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 3A synchronous step-down converter with 17uA quiescent current
- A5973D Up to 2 A step down switching regulator for automotive applications
- A6902D Up to 1 A Switch Step Down 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 Up to 1.5 A 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 uA quiescent current
- PM8903A 3 A step-down monolithic switching regulator
- L4964 High current switching regulator
- 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 3 A DC step-down switching regulator
- B5973D Up to 2 A step down 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 4A Monolithic synchronous step-down converter with high efficiency at light load
- L5973AD Up to 1.5 A step down switching regulator
- A6986F 38 V 1.5 A synchronous step-down switching regulator with 30 uA quiescent current
- L6986F 38 V 1.5 A synchronous step-down switching regulator with 30 uA quiescent current
- ST1S15 500 mA, 6 MHz synchronous step-down converter
- L4976 1 A step down switching regulator
- L4977A 7 A switching regulator
- A6986H 38 V 2 A synchronous step-down switching regulator with 30 uA quiescent current
- 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 Switching Regulator
- ST1S10 Monolithic synchronous step-down regulator
- L4974A 3.5 A switching regulator
- L4971 1.5A Switching Regulator
- ST1S06 Synchronous rectification with inhibit, 1.5 A, 1.5 MHz adjustable, step-down switching regulator
- L4970A 10 A switching regulator
- L4963 1.5 A SWITCHING REGULATOR
- ST1S12XX Synchronous rectification with inhibit, 0.7 A, 1.7 MHz adjustable, step-down switching regulator
- 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 3A DC step-down switching regulator
- L6926 High Efficiency Synchronous Step-Down Regulator
- ST2S08B Dual synchronous rectification, 1.5 A, 1.5 MHz adjustable step-down switching regulator
- L4975A 5 A switching regulator
- 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 uA quiescent current
- A6985F 38 V 0.5 A synchronous step-down switching regulator with 30 uA quiescent current
- L6985F 38 V 500 mA synchronous step-down switching regulator with 30 uA quiescent current
- L4962 1.5 A Switching Regulator
- 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 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 2A step-down switching regulator
- L7986TA 3A step-down switching regulator
- L7986 3A step-down switching regulator
- L6928 High efficiency monolithic synchronous step down regulator