Free Simple Circuit Diagram
A circuit of low-power switching regulator is shown in the schematic diagram below. This circuit can give output voltage of 5V from 9-V source. The efficiency of this circuit is 80% and the output capability of this circuit is 50-mA. This circuit is equipped with short circuit protection. Here is the schematic diagram:
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Using a FET and two additional transistors (cascaded to improve the gain), a 5V FET voltage regulator can be formed. The additional Tr2 and Tr3 transistors will improve the output current handling and decrease the output impedance. The output voltage deviate only 0.1V for load current change as high as 60 mA which is caused by load resistance changes that […]
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This voltage regulator arrangement is unique, since the op-amp is configured not to see either the source voltage or the output voltage directly, making it possible to regulate higher voltage while the IC is only suffering the transistors bias voltage. Here is the schematic diagram of the circuit: You can see in the diagram that the IC’s power supply pin […]
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It is possible to build a negative regulator using LM10 comparator and voltage reference IC. A transistor is employed to shift the reference current, increasing the minimum operating voltage to approximately 1.8V. The transistor should has high gain for better thermal stability, for example, gain = 100 will cause 1% drift over -55 to 125 °C temperature range. The gain […]
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