Electronics Projects, MC34063 SMD Step Down DC DC Converter Circuit 3V 12V Adjustable article
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DC DC converter circuit MC-34063 based on the extra power upgrade yet integrated 500 milliamps of power can give, but the output voltage according to this value changes the operating frequency C6 capacitor and the 70 kHz determined r4 5k potentiometer with output voltage can adjust the materials used SMD small type if you want regular supplies you can do with your circuit
Input voltage: 5Volt 24volt
Output voltage: 3volt – 12volt (adjustable)
Output current: 500mA max
Current consumption (no load): 10 mA
Efficiency: 85% max
PCB Size: 42 x 27 mm
MC34063 Step Down Converter Circuit
Switching regulators are more energy efficient, require as a linear regulator due to the low power dissipation, less Space and can be particularly compact Power supply module to devices many tasks solve. Super compact can be the task with SMD technology solve. Our step-down converter is within the input range from 5 V to 24 V can be used and gives an adjustable output voltage of 3 V to 12 V at a maximum current capacity of 0.5A.
If one wishes to supply a stabilized voltage realize, then either often to Linear regulator. However, particularly in larger differences between the input and Output voltage, the resulting Loss performance significantly. This reduces at Battery or the battery is not only unnecessary the life of the energy donor, but also raises thermal, and when a heat sink is required, Space problems in the Device on. after all “Generates” a Such a linear regulator, when, for example, supply with 12 V and will provide 3V should a power loss of 4.5 W (at a Output current of 0.5 A), which as heat be dissipated needs.
source http://www.elv-downloads.de/service/manual /SDW1/SDW1_KM_G_050110.pdf MC34063 SMD Step Down converter Circuit 3V 12V Adjustable schematic, pcb files alternative link: mc34063-smd-step-down-converter-circuit-3v-12v-adjustable.rar alternative link2