Renesas offers a wide portfolio of high-performance buck regulators with integrated FETs. A buck converter, also known as a step-down converter, is a DC/DC power converter that provides voltage step down and current step up. The converter reduces the voltage when the power source has a higher voltage than Vout of the regulator. A buck converter generally provides the most efficient solution with the smallest external components.

Unsure if a low powered linear regulator or highly efficient switching regulator is a better option for your design? Learn more about Linear vs. Switching Regulators.

Power & Power Management

Product Selection Table

    Processing table
    Part Number
    Topology [Rail 1]
    Outputs (#)
    Input Voltage (Min) [Rail 1] (V)
    Input Voltage (Max) [Rail 1] (V)
    Output Voltage (Min) [Rail 1] (V)
    Output Voltage (Max) [Rail 1] (V)
    Output Current (Max) [Rail 1] (A)
    Switching Frequency Range (Typical) (kHz)
    Control Type
    Peak Efficiency (%)
    IQ [Rail 1] (µA)
    SYNCH Capability
    Qualification Level
    Lead Count (#)
    Pkg. Type
    Simulation Model Available
    RAA211250
    Integrated FET 30V, 5A Synchronous Buck Regulator with Internal Compensation and Programmable Frequency    		 Buck 1 4.5 30 0.8 27 5 200 - 800 Peak Current Mode 90 90 No Standard 20, 16 QFN, TSSOP-EP iSim
    RAA211450
    Integrated FET 42V, 5A Synchronous Buck Regulator with Internal Compensation and Programmable Frequency    		 Buck 1 4.5 42 0.8 36 5 200 - 800 Peak Current Mode 90 90 No Standard 20, 16 QFN, TSSOP-EP iSim
    RAA211630
    Integrated FET 60V, 3A Synchronous Buck Regulator with Internal Compensation and Programmable Frequency    		 Buck 1 4.5 60 .8 55 3 200 - 800 Peak Current Mode 91 90 No Standard 20, 16 QFN, TSSOP-EP iSim
    RAA211820
    Integrated FET 75V, 2A Synchronous Buck Regulator with Internal Compensation and Programmable Frequency    		 Buck 1 4.5 75 0.8 65 2 200 - 800 Peak Current Mode 90 90 No Standard 20, 16 QFN, TSSOP-EP iSim
    RAA211835
    Integrated FET 75V, 3A Asynchronous Buck Regulator with Internal Compensation and Programmable Frequency    		 Buck 1 4.5 75 0.8 65 3 200 - 800 Peak Current Mode 87 90 No Standard 20, 16 QFN, TSSOP-EP iSim
    D2852
    Hybrid Converter for 12V to 5V AND 2S/3S to 1S    		 No
    EL7530
    Monolithic 600mA Step-Down Regulator with Low Quiescent Current    		 Buck 1 2.5 5.5 0.8 5.5 0.6 1500 Voltage Mode 94 120 Yes Standard 10 MSOP
    EL7531
    Monolithic 1A Step-Down Regulator with Low Quiescent Current    		 Buck 1 2.5 5.5 0.8 5.5 1 1400 Voltage Mode 94 120 Yes Standard 10 MSOP
    EL7536
    Monolithic 1A Step-Down Regulator    		 Buck 1 2.5 5.5 0.8 5.5 1 1400 Voltage Mode 94 No Standard 10 MSOP
    ISL65426
    6A Dual Synchronous Buck Regulator with Integrated MOSFETs    		 Buck 2 3 5.5 1 5.5 6 1000 Current Mode 95 No Standard 50 QFN iSim
    ISL80015
    Compact Synchronous Buck Converter    		 Buck 1 2.7 5.5 0.6 5.5 1.5 800 - 1200 Current Mode 95 No Standard 8 TDFN
    ISL80015A
    Compact Synchronous Buck Converter    		 Buck 1 2.7 5.5 0.6 4 1.5 1640 - 2360 Current Mode 95 No Standard 8 TDFN
    ISL80019
    Compact Synchronous Buck Regulators    		 Buck 1 2.7 5.5 0.6 5.5 1.5 850 - 1150 Current Mode 95 35 No Standard 8 TDFN
    ISL80019A
    Compact Synchronous Buck Regulators    		 Buck 1 2.7 5.5 0.6 5.5 1.5 1700 - 2300 Current Mode 95 35 No Standard 8 TDFN iSim
    ISL8002
    Compact Synchronous Buck Regulators    		 Buck 1 2.7 5.5 0.6 5.5 2 850 - 1150 Current Mode 95 35 No Standard 8 TDFN iSim
    ISL80020
    Compact Synchronous Buck Converter    		 Buck 1 2.7 5.5 0.6 5.5 2 800 - 1200 Current Mode 95 No Standard 8 TDFN
    ISL80020A
    Compact Synchronous Buck Converter    		 Buck 1 2.7 5.5 0.6 4 2 1640 - 2360 Current Mode 95 No Standard 8 TDFN
    ISL8002A
    Compact Synchronous Buck Regulators    		 Buck 1 2.7 5.5 0.6 5.5 2 1700 - 2300 Current Mode 95 35 No Standard 8 TDFN iSim
    ISL8002B
    Compact Synchronous Buck Regulator    		 Buck 1 2.7 5.5 0.6 4 2 1700 - 2300 Current Mode 95 35 No Standard 8 TDFN iSim
    ISL80030
    3A Synchronous Buck Converter in 2x2 DFN Package    		 Buck 1 2.7 5.5 0.6 5.5 3 1000 Current Mode 95 No Standard 8 DFN iSim
    ISL80030A
    3A Synchronous Buck Converter in 2x2 DFN Package    		 Buck 1 2.7 5.5 0.6 5.5 3 2000 Current Mode 95 No Standard 8 DFN iSim
    ISL80031
    3A Synchronous Buck Converter in 2x2 DFN Package    		 Buck 1 2.7 5.5 0.6 5.5 3 1000 Current Mode 95 No Standard 8 DFN iSim
    ISL80031A
    3A Synchronous Buck Converter in 2x2 DFN Package    		 Buck 1 2.7 5.5 0.6 5.5 3 2000 Current Mode 95 No Standard 8 DFN iSim
    ISL8009A
    1.5A Low Quiescent Current 1.6MHz High Efficiency Synchronous Buck Regulator    		 Buck 1 2.7 5.5 0.8 5.5 1.5 1600 Current Mode 95 17 No Standard 8 DFN iSim
    ISL8012
    2A Low Quiescent Current 1MHz High Efficiency Synchronous Buck Regulator    		 Buck 1 2.7 5.5 0.8 5.5 2 1000 Current Mode 95 40 No Standard 10 DFN
    ISL8013
    3A Low Quiescent Current 1MHz High Efficiency Synchronous Buck Regulator    		 Buck 1 2.7 5.5 0.8 5.5 3 1000 Current Mode 97 35 Yes Standard 16 QFN iSim
    ISL8013A
    3A Low Quiescent Current 1MHz High Efficiency Synchronous Buck Regulator    		 Buck 1 2.8 5.5 0.8 5.5 3 1000 Current Mode 97 35 Yes Standard 16 QFN iSim
    ISL8014A
    4A Low Quiescent Current 1MHz High Efficiency Synchronous Buck Regulator    		 Buck 1 2.8 5.5 0.8 5.5 4 1000 Current Mode 97 35 Yes Standard 16 QFN iSim
    ISL8016
    6A Low Quiescent Current High Efficiency Synchronous Buck Regulator    		 Buck 1 2.7 5.5 0.6 5.5 6 500 - 4000 Current Mode 97 70 Yes Standard 20 QFN iSim
    ISL8018
    8A Low Quiescent Current High Efficiency Synchronous Buck Regulator    		 Buck 1 2.7 5.5 0.6 5.5 8 500 - 4000 Current Mode 97 70 Yes Standard 20 QFN iSim
    ISL8022
    Dual 2A/1.7A Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck Regulator    		 Buck 2 2.8 5.5 0.6 5.5 2 2250 Current Mode 97 40 Yes Standard 12 DFN
    ISL8023
    Compact Synchronous Buck Regulator    		 Buck 1 2.7 5.5 0.6 5.5 3 500 - 4000 Current Mode 95 50 Yes Standard 16 TQFN iSim
    ISL8023A
    Compact Synchronous Buck Regulator    		 Buck 1 2.7 5.5 0.6 5.5 3 500 - 4000 Current Mode 95 50 Yes Standard 16 TQFN
    ISL8024
    Compact Synchronous Buck Regulator    		 Buck 1 2.7 5.5 0.6 5.5 4 500 - 4000 Current Mode 95 50 Yes Standard 16 TQFN iSim
    ISL8024A
    Compact Synchronous Buck Regulator    		 Buck 1 2.7 5.5 0.6 5.5 4 500 - 4000 Current Mode 95 50 Yes Standard 16 TQFN
    ISL8025
    Compact Synchronous Buck Regulator    		 Buck 1 2.7 5.5 0.6 5.5 5 500 - 4000 Current Mode 95 50 Yes Standard 16 TQFN iSim
    ISL8025A
    Compact Synchronous Buck Regulator    		 Buck 1 2.7 5.5 0.6 5.5 5 500 - 4000 Current Mode 95 50 Yes Standard 16 TQFN
    ISL8026
    Compact Synchronous Buck Regulators    		 Buck 1 2.5 5.5 0.6 5.5 6 490 - 4200 Current Mode 95 50 Yes Standard 16 TQFN
    ISL8026A
    Compact Synchronous Buck Regulators    		 Buck 1 2.5 5.5 0.6 5.5 6 490 - 4200 Current Mode 95 50 Yes Standard 16 TQFN
    ISL8033
    Dual 3A Low Quiescent Current High Efficiency Synchronous Buck Regulator    		 Buck 2 2.85 6 0.8 6 3 1000 Current Mode 95 Yes Standard 24 QFN iSim
    ISL8033A
    Dual 3A Low Quiescent Current High Efficiency Synchronous Buck Regulator    		 Buck 2 2.85 6 0.8 6 3 2500 Current Mode 95 Yes Standard 24 QFN iSim
    ISL8036
    Dual 3A 1MHz/2.5MHz High Efficiency Synchronous Buck Regulator    		 Buck 2 2.85 6 0.8 6 3 1000 Current Mode 95 Yes Standard 24 QFN iSim
    ISL8036A
    Dual 3A 2.5MHz High Efficiency Synchronous Buck Regulator    		 Buck 2 2.85 6 0.8 6 3 2500 Current Mode 95 Yes Standard 24 QFN iSim
    ISL8088
    Dual 800mA Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck Regulator    		 Buck 2 2.75 5.5 0.6 5.5 0.8 2250 Current Mode 96 Yes Standard 10 DFN
    ISL85003
    Highly Efficient 3A Synchronous Buck Regulator    		 Buck 1 4.5 18 0.8 15 3 500 Current Mode 95 Yes Standard 12 DFN iSim
    ISL85003A
    Highly Efficient 3A Synchronous Buck Regulator    		 Buck 1 4.5 18 0.8 15 3 500 Current Mode 95 Yes Standard 12 DFN iSim
    ISL85005
    4.5V to 18V Input, 5A High Efficiency Synchronous Buck Regulator    		 Buck 1 4.5 18 0.8 15 5 500 Current Mode 95 Yes Standard 12 DFN iSim
    ISL85005A
    4.5V to 18V Input, 5A High Efficiency Synchronous Buck Regulator    		 Buck 1 4.5 18 0.8 15 5 500 Current Mode 95 Yes Standard 12 DFN iSim
    ISL85009
    9A, 3.8V to 18V Input, Synchronous Buck Regulator    		 Buck 1 3.8 18 0.6 5 9 300 - 600 Current Mode 97 Yes Standard 15 QFN iSim
    ISL85012
    12A, 3.8V to 18V Input, Synchronous Buck Regulator    		 Buck 1 3.8 18 0.6 5 12 100 - 1000 Current Mode 97 Yes Standard 15 QFN iSim
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    Documentation

    Title Type Date
    AN1663: Designing a Buck Converter
    PDF279 KB
    Application Note
    Building Automation Brochure
    PDF19.79 MB日本語
    Brochure
    Doing More with Buck Regulator ICs
    PDF1.07 MB
    White Paper
    How to Reconfigure a Buck Converter for Multiple Outputs
    PDF468 KB
    White Paper
    How to Configure the Tracking and Power Sequencing of FPGAs
    PDF526 KB
    White Paper
    How to Protect Buck Regulators from Overcurrent Damage
    PDF378 KB
    White Paper
    How to Charge Supercapacitor Banks for Energy Storage
    PDF431 KB 简体中文
    White Paper
    Portfolio of 30V-75V Bucks Power the Highest-Precision Loads with Excellent Accuracy

    The RAA211x family of bucks are highly scalable due to its unique pin-compatible wide Vin buck variants with integrated FETs that support up to 5A of continuous output current with premium load and line regulation performance. The RAA211835 supports 75V async buck operation of 3A loadings, while RAA211250/450/630/820 support sync buck operation of 30V 5A, 40V 5A, 60V 3A, 75V 2A respectively.

    Video List
    Portfolio of 30V-75V Bucks Power the Highest-Precision Loads with Excellent Accuracy
    12V Sync Buck Regulator Family Delivers Up to 14A
    ISL85003/3A Sync Buck Regulators
    ISL8018 8A Synchronous Buck Regulator Webinar
    ISL8002B 2A Synchronous Buck Regulator Webinar