This is the circuit diagram of a 5V switching regulator based on the IC LM2678. The LM2678 series of regulators are monolithic integrated circuits which provide all necessary functions required for a buck switching regulator and can drive up to 5A loads. The IC has more than 90% efficiency and has excellent load and line regulation. The LM2678 is available in three fixed output voltages (3.3V, 5V, 12V) and an adjustable output version. The IC is also packed with a handful l of features like thermal shutdown, current limiting and ON/OFF control.
Skema Rangkaian 5 Volt Switching Regulator LM2678-5.0
LM2678-5.0 PinoutNote:
- The circuit given here is based on the version LM2678-5.0 which gives an output of 5V.
- The power supply for the circuit can be anything between 8 to 40V DC.
- The feedback wiring must be placed as away as possible from the inductor L1.
- Do not use loads that consume more than 5A.
- A heat sink is seriously recommended for the IC.
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