NCP662SQ33T1G

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The NCP662SQ33T1G is a linear voltage regulator (LVR) from Texas Instruments that provides voltage regulation and over-current protection for a wide range of loads. The regulator, in a compact 2 mm x 2 mm package, has a low quiescent current for reduced heat sink considerations, making it suitable for demanding applications such as high-end computing, industrial equipment, and instrumentation. This article will look at the application field and working principle of the NCP662SQ33T1G.

Application Field

The NCP662SQ33T1G is ideal for space-constrained applications that require a very low power, cost-effective linear voltage regulator solution. It provides good line and load regulation in an easy-to-use package, that is immune to common-mode transients such as load dump, ESD and cable transients. Its dropout voltage is designed to remain constant with variations in temperature and load, further reducing the risk of over-voltage conditions.

The NCP662SQ33T1G is able to maintain positive and negative combined output voltages of 3.3 V and with low supply current consumption of 2 mA (typical) and surge current to 4 A (typical). This makes it suitable for a wide range of applications such as personal computers, automotive systems, and wireless communication devices. Its ultra-low dropout voltage of 200 mV and its high-accuracy output voltage makes it ideal for applications that require precision regulation such as solar battery chargers and other power sensitive systems.

Working Principle

The NCP662SQ33T1G is a linear voltage regulator (LVR), which means it uses a voltage reference and current sensing to modulate the output voltage. The voltage reference is a voltage divider network that consists of the fixed reference voltage and the feedback and compensation pins. The linear regulator maintains a constant output voltage, regardless of input voltage or load variations, by a negative feedback loop, which increases or decreases the output voltage by adjusting the duty cycle of the driver stage.

When the load exceeds the maximum output current, the regulator will shut down in order to protect itself and the connected load. The output protection circuit acts as a voltage limiter, allowing for safe operation and recovery from short circuits and over-current conditions. The frequency of the internal oscillator can also be adjusted to optimize performance and reduce power losses.

The NCP662SQ33T1G also features an improved soft-start design that helps to limit in-rush current at start-up, while still providing a fast response time and accurate regulation of output voltages.

Conclusion

The NCP662SQ33T1G Linear Voltage Regulator is a compact and cost-effective solution for a wide range of applications. Its low quiescent current and high accuracy output voltage make it ideal for high-end computing, industrial equipment, and instrumentation applications. Its over-current protection and improved soft-start design also make it suitable for solar battery chargers and other power sensitive systems. This article has discussed the application field and working principle of the NCP662SQ33T1G.

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