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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STMicroelectronics, L4972ADStep-Down Switching Regulator, 1-Channel 2A Adjustable 20-Pin, SOIC
VND176,492.80 -
Texas Instruments, LM2678S-5.0/NOPBStep-Down Switching Regulator, 1-Channel 5A 7-PinD2PAK
VND177,068.32 -
Texas Instruments, LM22677TJE-ADJ/NOPBStep-Down Switching Regulator, 1-Channel 5A Adjustable 7-PinD2PAK
VND189,537.92 -
Texas Instruments, LMR16006YDDCTStep-Down Switching Regulator, 1-Channel 600mA Adjustable 6-Pin, SOT-23
VND197,978.88Pack (1 Pack of 2) -
Analog Devices, LT3470ETS8#TRMPBF Step-Down Switching Regulator 200mA Adjustable 8-Pin, TSOT-23
VND207,379.04 -
Texas Instruments LM2577T-ADJ/NOPB, Step Up Regulator, Step Up 3A Adjustable, 56 kHz 5-Pin, TO-220
VND205,268.80 -
Texas Instruments, LM2676S-ADJ/NOPBStep-Down Switching Regulator, 1-Channel 3A Adjustable 7-PinD2PAK
VND215,436.32 -
Microchip, LM2576WT Adjustable Switching Regulator, 1-Channel 3A Adjustable 5-Pin, TO-220
VND235,387.68Pack (1 Pack of 5) -
onsemi FAN7527BMX, Dual Buck Boost Switching, Buck Boost Regulator ±500mA, 12 → 16 V, 50 kHz 8-Pin, SOP
VND243,828.64Reel (1 Reel of 10) -
Analog Devices LT1172CN8#PBF, 1 Buck Boost Switching, Buck/Boost Converter 3.5A, 1.24 → 65 V, 115 kHz 8-Pin, PDIP
VND267,808.64 -
Texas Instruments, TPS54332DDAR DC-DC Converter, 1-Channel 3.5A Adjustable 8-Pin, SO PowerPAD
VND278,935.36Pack (1 Pack of 5) -
Analog Devices, LTC3810EG#PBF Switching Regulator, 1-Channel 2A Adjustable 28-Pin, SSOP
VND0.00 -
onsemi FAN7527BMX, Dual Buck Boost Switching, Buck Boost Regulator ±500mA, 12 → 16 V, 50 kHz 8-Pin, SOP
VND0.00 -
Microchip, LM2576-12WT Adjustable Switching Regulator, 1-Channel 3A 5-Pin, TO-220
VND336,295.52Pack (1 Pack of 5) -
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onsemi, LM2576T-ADJG Step-Down Switching Regulator, 1-Channel 3A Adjustable 5-Pin, TO-220
VND341,858.88VND341,091.52Tube (1 Tube of 5) -
ON Semiconductor LM2575T-12G, 1 Buck Boost Switching, Buck Boost Regulator 1A, 3.2 → 3.3 V, 63 kHz 5-Pin, TO-220
VND341,667.04Pack (1 Pack of 5) -
STMicroelectronics, L4974AStep-Down Switching Regulator, 1-Channel 3.5A Adjustable 20-Pin, PDIP
VND343,585.44 -
Texas Instruments, LM2596S-12/NOPBStep-Down Switching Regulator, 1-Channel 3A 5-PinD2PAK
VND344,736.48Tube (1 Tube of 2) -
Texas Instruments LMR62421XMFE/NOPB, Boost Converter, Step Up 3A Adjustable, 2000 kHz 5-Pin, SOT-23
VND362,769.44Reel (1 Reel of 10) -
onsemi, LM2596DSADJG Switching Regulator, 1-Channel 3A Adjustable 5-Pin, D2PAK
VND381,186.08Tube (1 Tube of 5) -
Analog Devices, LT3970EMS-5#PBF Switching Regulator, 1-Channel 350mA 10-Pin, MSOP
VND383,488.16Tube (1 Tube of 2)
