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Buck Boost Switching Regulators & Converters

A Buck Converter, also known as a Step-Down Converter, is a DC-to-DC power converter that steps down the voltage from its input to its output. A buck converter integrates the core components and circuitry needed into a single device.Buck converters are found in countless electronic applications, where their power regulation properties are a vital component.How does a Buck Converter work?A Buck Converter is a type of switch-mode power supply, a class of device that incorporates a switch (e.g. typically a MOSFET) to rapidly turn the circuit on and off. This rapid switching creates a square wave. If the duty cycle of the switch is set to 50%, i.e. the switch is on 50% of the time, the average voltage will be 50% of the input.The square wave needs to be smoothed to provide useful power, typically an inductor and capacitor are used in series to fulfil this function. This combination is called an LC low pass filter. The properties of an inductor smooth the current flow, while the capacitor resists sudden changes in voltage. The combined effect produces a relatively smooth voltage output with low ripple. For example, if the input voltage is 10V and the switch employs a duty cycle of 50%, the output voltage will be 5V.A further necessary component of a Buck Converter is to incorporate a diode or other switch in parallel with the inductor. This is to compensate for the property of an inductor, in that the current in an inductor cannot instantly change, protecting the switching transistor from being overloaded and destroyed.Buck Converters also incorporate additional circuitry to ensure a stable output voltage. The converter uses a closed-loop control scheme with negative feedback to monitor the voltage output and dynamically adjusts the duty cycle of the switch to regulate the output voltage.Design considerationsBuck Converters are very efficient, with some devices offering efficiencies of above 95%.Buck Converters can be more cost-effective than linear regulators at higher power levels, the cost of removing the heat generated by a linear regulator may be less than employing a Buck Converter.The output of a Buck Converter will feature a noise, meaning the more stable output of a linear voltage regulator is better suited for application requiring low output noise.Linear regulators can respond faster to input and output changes versus a buck converter.

Showing 1–24 of 71 results

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  • Product image for LT1172CN8PBF

    Analog Devices LT1172CN8#PBF, 1 Buck Boost Switching, Buck/Boost Converter 3.5A, 1.24 → 65 V, 115 kHz 8-Pin, PDIP

    RS Stock No.
    5455017
    Brand
    Analog Devices
    Mfr. Prt No.
    LT1172CN8#PBF
    VND
    267,808.64
  • Product image for Analog Devices LT1172CT#PBF, 1, Boost/Buck Converter Cuk, Flyback, Forward, Inverting 1.25A, 115 kHz 5-Pin, TO-220

    Analog Devices LT1172CT#PBF, 1 Buck Boost Switching, Boost/Buck Converter 1.25A, 1.24 → 65 V, 115 kHz 5-Pin,

    RS Stock No.
    7799120
    Brand
    Analog Devices
    Mfr. Prt No.
    LT1172CT#PBF
    VND
    0.00
    Tube (1 Tube of 2)
  • Product image for Switching Regulator Step-Down 5A TO220-7

    Analog Devices, LT1074HVIT7#PBF Switching Regulator, 1-Channel 5A 7-Pin, TO-220

    RS Stock No.
    7799000
    Brand
    Analog Devices
    Mfr. Prt No.
    LT1074HVIT7#PBF
    VND
    0.00
  • Product image for 300mA 40V Micropwr Step-Down Reg LT3470

    Analog Devices, LT3470ETS8#TRMPBF Step-Down Switching Regulator 200mA Adjustable 8-Pin, TSOT-23

    RS Stock No.
    0423567
    Brand
    Analog Devices
    Mfr. Prt No.
    LT3470ETS8#TRMPBF
    VND
    207,379.04
  • Product image for 40V 350mA 5V Buck Reg. 2.5uA IQ MSOP10

    Analog Devices, LT3970EMS-5#PBF Switching Regulator, 1-Channel 350mA 10-Pin, MSOP

    RS Stock No.
    7869651
    Brand
    Analog Devices
    Mfr. Prt No.
    LT3970EMS-5#PBF
    VND
    383,488.16
    Tube (1 Tube of 2)
  • Product image for 100V Current Mode Regulator Controller

    Analog Devices, LTC3810EG#PBF Switching Regulator, 1-Channel 2A Adjustable 28-Pin, SSOP

    RS Stock No.
    8225692
    Brand
    Analog Devices
    Mfr. Prt No.
    LTC3810EG#PBF
    VND
    0.00
  • Product image for 3A STEP-DOWN SMPS REGULATOR

    Microchip, LM2576-12WT Adjustable Switching Regulator, 1-Channel 3A 5-Pin, TO-220

    RS Stock No.
    1771883
    Brand
    Microchip
    Mfr. Prt No.
    LM2576-12WT
    VND
    336,295.52
    Pack (1 Pack of 5)
  • Product image for 3A STEP-DOWN SMPS REGULATOR

    Microchip, LM2576WT Adjustable Switching Regulator, 1-Channel 3A Adjustable 5-Pin, TO-220

    RS Stock No.
    1771904
    Brand
    Microchip
    Mfr. Prt No.
    LM2576WT
    VND
    235,387.68
    Pack (1 Pack of 5)
  • Product image for DC-DC Converter Step-Down 4-30V SOT23-6

    Microchip, MCP16301T-I/CHY DC-DC Converter, 1-Channel 600mA Adjustable 6-Pin, SOT-23

    RS Stock No.
    7709476
    Brand
    Microchip
    Mfr. Prt No.
    MCP16301T-I/CHY
    VND
    145,798.40
    Pack (1 Pack of 4)
  • Product image for BUCK CONVERTER ADJ. 2-24V 1A MSOP-8

    Microchip, MCP16312-E/MSStep-Down Switching Regulator, 1-Channel 1A Adjustable 8-Pin, MSOP

    RS Stock No.
    8938262
    Brand
    Microchip
    Mfr. Prt No.
    MCP16312-E/MS
    VND
    437,970.72
    Pack (1 Pack of 10)
  • Product image for 1.3A Buck Reg SuperSwitcher MIC4680-5.0Y

    MicrochipStep-Down Switching Regulator, 1-Channel 1.3A 8-Pin, SOIC

    RS Stock No.
    9101575
    Brand
    Microchip
    Mfr. Prt No.
    MIC4680-5.0YM
    VND
    154,239.36
    Pack (1 Pack of 2)

  • ON Semiconductor LM2575T-12G, 1 Buck Boost Switching, Buck Boost Regulator 1A, 3.2 → 3.3 V, 63 kHz 5-Pin, TO-220

    VND
    0.00

  • ON Semiconductor LM2575T-12G, 1 Buck Boost Switching, Buck Boost Regulator 1A, 3.2 → 3.3 V, 63 kHz 5-Pin, TO-220

    RS Stock No.
    1869708
    Brand
    ON Semiconductor
    Mfr. Prt No.
    LM2575T-12G
    VND
    341,667.04
    Pack (1 Pack of 5)
  • Product image for ON SEMICONDUCTOR, FAN7527BMX

    onsemi FAN7527BMX, Dual Buck Boost Switching, Buck Boost Regulator ±500mA, 12 → 16 V, 50 kHz 8-Pin, SOP

    RS Stock No.
    1869910
    Brand
    ON Semiconductor
    Mfr. Prt No.
    FAN7527BMX
    VND
    243,828.64
    Reel (1 Reel of 10)
  • Product image for Sw Regulator 1.5A Step-Up/Down/Inv SOIC8

    onsemi MC33063ADR2G, 1 Buck Boost Switching, Buck/Boost Converter 1.5A 8-Pin, SOIC

    RS Stock No.
    6899941
    Brand
    ON Semiconductor
    Mfr. Prt No.
    MC33063ADR2G
    VND
    23,020.80
  • Product image for STEP UP DC-DC CONVERTER,MC33063AP1 1.25V

    onsemi MC33063AP1G, 1 Buck Boost Switching, Buck/Boost Converter 1.5A 8-Pin, PDIP

    RS Stock No.
    5165360
    Brand
    ON Semiconductor
    Mfr. Prt No.
    MC33063AP1G
    VND
    27,049.44
  • Product image for MC34166TG

    onsemi MC34166TG, 1 Buck Boost Switching, Buck/Boost Converter 3A, -1.5 → 40 V, 79 kHz 5-Pin, TO-220

    RS Stock No.
    6255010
    Brand
    ON Semiconductor
    Mfr. Prt No.
    MC34166TG
    VND
    80,189.12
  • Product image for Sw.Regulator 3A Step-Up/Down/Inv TO220-5

    onsemi MC34166TVG, 1 Buck Boost Switching, Boost/Buck Converter 3A, 5 V, 72 kHz 5-Pin, TO-220

    RS Stock No.
    7862439
    Brand
    ON Semiconductor
    Mfr. Prt No.
    MC34166TVG
    VND
    169,586.56
    Pack (1 Pack of 2)

  • onsemi UC3842BVD1R2G, 1 Buck Boost Switching, Flyback Controller 1A, 4.9 → 5.1 V, 500 kHz 8-Pin, SOIC

    VND
    0.00
  • Product image for ON SEMICONDUCTOR, UC3842BVD1R2G

    onsemi UC3842BVD1R2G, 1 Buck Boost Switching, Flyback Controller 1A, 4.9 → 5.1 V, 500 kHz 8-Pin, SOIC

    RS Stock No.
    1869858
    Brand
    ON Semiconductor
    Mfr. Prt No.
    UC3842BVD1R2G
    VND
    404,206.88
    Pack (1 Pack of 25)
  • Product image for Sw. Regulator 0.5A Adj Step-Down PDIP8

    onsemi, LM2574N-ADJG Step-Down Switching Regulator, 1-Channel 500mA Adjustable 8-Pin, PDIP

    RS Stock No.
    6899938
    Brand
    ON Semiconductor
    Mfr. Prt No.
    LM2574N-ADJG
    VND
    50,070.24