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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 25–48 of 71 results

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  • 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

  • Texas Instruments, LM2596S-12/NOPBStep-Down Switching Regulator, 1-Channel 3A 5-PinD2PAK

    RS Stock No.
    1977226
    Brand
    Texas Instruments
    Mfr. Prt No.
    LM2596S-12/NOPB
    VND
    344,736.48
    Tube (1 Tube of 2)

  • Texas Instruments, LM2575S-5.0/NOPBStep-Down Switching Regulator, 1-Channel 1A 5-PinD2PAK

    RS Stock No.
    1977212
    Brand
    Texas Instruments
    Mfr. Prt No.
    LM2575S-5.0/NOPB
    VND
    578,781.28
    Pack (1 Pack of 5)

  • Texas Instruments, TPS5420DStep-Down Switching Regulator, 1-Channel 2A Adjustable 8-Pin, SOIC

    RS Stock No.
    1977592
    Brand
    Texas Instruments
    Mfr. Prt No.
    TPS5420D
    VND
    556,719.68
    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 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)

  • 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 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 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 IC,VERY LOW POWER AC-DC,NON ISOLATED LIN

    Power Integrations, LNK302PNStep-Down Switching Regulator, 1-Channel 80mA 7-Pin, DIPB

    RS Stock No.
    1465618
    Brand
    Power Integrations
    Mfr. Prt No.
    LNK302PN
    VND
    828,940.64
    Tube (1 Tube of 50)
  • Product image for 28V 3A BUCK CONVERTER 570KHZ SO POWERPAD

    Texas Instruments, TPS54334DDAStep-Down Switching Regulator, 1-Channel 3A Adjustable 8-Pin, SO PowerPAD

    RS Stock No.
    1330746
    Brand
    Texas Instruments
    Mfr. Prt No.
    TPS54334DDA
    VND
    396,725.12
    Pack (1 Pack of 5)
  • Product image for SW. REGULATOR 3A ADJ. STEP-DOWN D2PAK-5

    onsemi, LM2596DSADJG Switching Regulator, 1-Channel 3A Adjustable 5-Pin, D2PAK

    RS Stock No.
    1216368
    Brand
    ON Semiconductor
    Mfr. Prt No.
    LM2596DSADJG
    VND
    2,888,726.72
    Tube (1 Tube of 50)

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

    VND
    0.00

  • Texas Instruments TPS63060DSCT, 1 Buck Boost Switching, Buck/Boost Converter 1A, 2.5 → 8 V, 2600 kHz 10-Pin, WSON

    VND
    0.00
  • Product image for SIMPLE SWITCHER 5.0A,LM22677TJE-ADJ

    Texas Instruments, LM22677TJE-ADJ/NOPBStep-Down Switching Regulator, 1-Channel 5A Adjustable 7-PinD2PAK

    RS Stock No.
    6606115
    Brand
    Texas Instruments
    Mfr. Prt No.
    LM22677TJE-ADJ/NOPB
    VND
    189,537.92

  • Texas Instruments, LM2596S-12/NOPBStep-Down Switching Regulator, 1-Channel 3A 5-PinD2PAK

    VND
    0.00

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

    VND
    0.00

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

    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

    VND
    0.00