Voltage Converter 3V to 5V using MAX660

Voltage converter circuit diagram for converting 3 volts to 5 volts using CMOS monolithic ICs MAX660 and MAX667, which functions as a positive voltage regulator.

The voltage converter circuit utilizes the MAX660 and MAX667 integrated circuits to step up a 3-volt input to a 5-volt output. The MAX660 is a voltage converter that efficiently boosts lower voltages to higher levels, while the MAX667 acts as a voltage regulator to ensure the output remains stable at 5 volts.

The circuit typically consists of the following components:

1. **Input Capacitor (C1)**: This capacitor is connected to the input voltage (3V) to smooth out any fluctuations and provide stable power to the MAX660. A value of around 10 µF is commonly used for this purpose.

2. **Inductor (L1)**: The inductor is a crucial component in the voltage boosting process. It stores energy when current flows through it and releases it to the output when the circuit switches. The inductor value should be selected based on the desired output current and the switching frequency of the MAX660.

3. **Diode (D1)**: A Schottky diode is typically used in this configuration to prevent backflow of current and to ensure that the energy stored in the inductor is directed towards the output. This diode should have a low forward voltage drop to maintain efficiency.

4. **Output Capacitor (C2)**: This capacitor stabilizes the output voltage and reduces ripple. A value of around 10 µF to 22 µF is recommended for effective filtering.

5. **MAX667 Voltage Regulator**: The MAX667 is connected to the output of the MAX660 to regulate the output voltage at a precise 5 volts. It provides excellent line and load regulation, ensuring that the output remains stable under varying conditions.

6. **Feedback Resistor Network (R1 and R2)**: These resistors set the output voltage level for the MAX667. The resistor values must be chosen based on the desired output voltage and the feedback configuration of the regulator.

The entire circuit should be designed on a printed circuit board (PCB) to minimize noise and interference, ensuring reliable operation. Proper layout techniques, including keeping high-frequency paths short and using ground planes, will enhance the performance of the voltage converter circuit.

In summary, this voltage converter circuit effectively steps up a 3V input to a stable 5V output using the MAX660 and MAX667 ICs, making it suitable for applications requiring a higher voltage from a lower voltage source.Voltage Converter Circuit diagram for 3 volts to 5 volts (3v to 5v) using IC (CMOS Monolithic) MAX660 and MAX667-a positive voltage regulator 🔗 External reference