NCV8133BMX130TCG

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NCV8133BMX130TCG Application Field and Working Principle

The NCV8133BMX130TCG is a voltage regulator from the Linear PMIC – Voltage Regulator range. In particular, it is a cost effective and efficient, zero-drift, linear bifilar current-sense low dropout (LDRO) regulator.

The linear regulator is a component that regulates the output voltage of a circuit. It works by comparing a reference voltage to the input voltage and then reducing the output accordingly. The NCV8133BMX130TCG is particularly suited, due to its up to 130mA output current, to applications where low-noise, low-ripple, and low-dropout performance is paramount.

Application Field

The NCV8133BMX130TCG is designed for power-sensitive applications needing precise low-voltage regulation with wide line and load variations, such as battery systems, clock circuits, and power management ICs (PMICs). Typical applications include:

• All highly noise-sensitive circuitry
• Wireless, cellular, RF, and data communication
• Embedded systems
• Sensors
• Audio/video systems

Key Features

The NCV8133BMX130TCG is a versatile regulator due to its various features, including:

• Zero-dropout input voltage from 0.8V to 5.5V
• Output current up to 130mA
• Wide range of output voltages from 1.2V to 5V
• Accurate voltage regulation within ±1% over line, load, temperature, and time
• Current output limited using external voltage or current sensing
• Low-noise and low quiescent current
• Surge protection
• Soft-start limit inrush current
• Undervoltage lockout
• Internal compensation
• Discontinuous operation mode

The NCV8133BMX130TCG has a wide range of standard packages, making it suitable for various board space configurations.

Working Principle

The Linear PMIC – Voltage Regulator is a device that operates by taking an input voltage and generating a lower, regulated output voltage. It works by comparing a variable reference voltage with the input voltage. The variable reference voltage is produced by a voltage divider, consisting of two resistors connected in series. The two resistors are selected to divide the input voltage in a ratio of two-to-one. The output of the variable reference voltage is connected to the error amplifier. So, when the output voltage is higher than the setpoint, the output of the error amplifier goes lower, and vice versa.

The output of the error amplifier is then connected to the gate of the voltage regulating transistor, such as an N-channel enhancement MOSFET (metal oxide semiconductor field-effect transistor). At this point, the transistor serves as the feedback element: when the output voltage is too high, the MOSFET\'s gate voltage goes up and the MOSFET\'s resistance lowers, so that the current is limited and the voltage falls.

The output of the voltage regulating transistor is connected to load and its input is connected to the input voltage. Thus, the MOSFET serves as a control element, limiting the output voltage of the circuit to the ideal setpoint voltage.

Conclusion

The NCV8133BMX130TCG is a versatile linear regulator, capable of providing precise low-voltage regulation with wide line and load variations. Thanks to its wide range of features, including zero-dropout input voltage from 0.8V to 5.5V and output current up to 130mA, it is suitable for a wide range of applications, such as battery systems, clock circuits, and power management ICs (PMICs). Moreover, its low-noise and low quiescent current combined with various standard packages make it ideal for power-sensitive applications.

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