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PMIC - Voltage Regulators - Linear

Voltage regulators are electronic components used to provide a steady voltage output with variations that are usually within acceptable limits while withstanding the changes in the load. Linear voltage regulators are the most common and simplest type of voltage regulators available. The NCP707BMX150TCG is one such linear voltage regulator.

NCP707BMX150TCG Application Fields

The NCP707BMX150TCG is a three-terminal linear voltage regulator that is suitable for use in a wide range of applications. Take a look at a few:

• Battery-powered or battery charger-based power management systems.
• GPS receivers, digital cameras, and portable players.
• Sensors and other low power electronics.
• Automatic appliance control and components.

NCP707BMX150TCG Working Principle

Linear voltage regulators are designed to take an input voltage, either an AC or DC signal, and output a steady DC voltage. In the NCP707BMX150TCG, this action is accomplished by an internal series pass element, usually an NPN transistor, which operates in the voltage regulation region of its transfer characteristics curve. This element is placed in series between the input and output of the regulator and is driven by an error amplifier, which senses any change in the output voltage.

When the input voltage changes with respect to the output, the error amplifier increases or decreases the current through the series pass element. This increases or decreases the voltage drop across it and thus the output voltage of the regulator is kept constant. This results in a steady output voltage that is unaffected by the input voltage, load current, and temperature.

In addition, NCP707BMX150TCG devices also feature an internal flip-flop that is capable of controlling output voltage, as well as an output voltage warning signal. The flip-flop is designed to momentarily activate every 10µs when the output voltage reaches its preset level, allowing the microcontroller to detect a voltage warning condition and take appropriate action.

Conclusion

The NCP707BMX150TCG is a highly efficient, three-terminal linear voltage regulator suitable for a wide range of applications. It is designed for use in battery-powered or battery charger-based power management systems, GPS receivers, digital cameras, and portable players, as well as sensors and other low power electronics and automatic appliance control components. Its working principle is based on an internal series pass element, which is driven by an error amplifier to maintain a constant output voltage regardless of input voltage and load current.

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