Low-Cost Boost Converter 3.3V Input – 5V Output at 250mA
This is a low-cost boost converter that converts a 3.3V input to 5V at 250mA load current. The LM2578A chip is used to build this project. The LM2578A is a switching regulator which can easily be set up for such DC-to-DC voltage conversion circuits as the buck, boost and inverting configurations. In this board, the IC is configured as a boost converter. The operating frequency is 50Khz.
Features
- Input Voltage 3.3V
- Output Voltage 5V DC (+/-5%)
- Output Current 250mA
- Efficiency Approx 80%
- Current Limit 2A
- Operating Frequency 50Khz
- Thermal Shutdown
- PCB Dimensions 38.58 x 17.94mm
Connections
- CN1: Pin 1 = 3.3V DC Input, Pin 2 = GND
- CN2: Pin 1 = 5V DC Output, Pin 2 = GND
The boost or step-up converter converts a DC voltage to a higher DC voltage. When the switch software is turned on, energy is stored in the inductor L and the inductor current iL ramps up at a slope determined by the input voltage. Diode D is off during this period. Once the switch, SW, turns off, diode D starts to conduct and the energy stored in the inductor is released to the load. Current in the inductor ramps down at a slope determined by the difference between the input and output voltages.
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This is a low-cost boost converter that converts a 3.3V input to 5V at 250mA load current. The LM2578A chip is used to build this project. The LM2578A is a switching regulator which can easily be set up for such DC-to-DC voltage conversion circuits as the buck, boost and inverting configurations. In this board, the IC is configured as a boost converter. The operating frequency is 50Khz.
Features
- Input Voltage 3.3V
- Output Voltage 5V DC (+/-5%)
- Output Current 250mA
- Efficiency Approx 80%
- Current Limit 2A
- Operating Frequency 50Khz
- Thermal Shutdown
- PCB Dimensions 38.58 x 17.94mm
Connections
- CN1: Pin 1 = 3.3V DC Input, Pin 2 = GND
- CN2: Pin 1 = 5V DC Output, Pin 2 = GND
The boost or step-up converter converts a DC voltage to a higher DC voltage. When the switch software is turned on, energy is stored in the inductor L and the inductor current iL ramps up at a slope determined by the input voltage. Diode D is off during this period. Once the switch, SW, turns off, diode D starts to conduct and the energy stored in the inductor is released to the load. Current in the inductor ramps down at a slope determined by the difference between the input and output voltages.
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