NCV1117ST12T3

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NCV1117ST12T3 is an integrated voltage regulator, which belongs to linear category of PMIC-Voltage Regulators-Linear. It is a low dropout (LDO) regulator with a wide range of operating voltages, including the wide industry standard of 1.3V to 42V, and adjustable output current of 4.2A continuous. Its application fields and working principes are what to be discussed.

Application Fields

NCV1117ST12T3 is designed for general-purpose voltage regulation in automotive, industrial, battery-driven and AC/DC power supplies. The main feature of this integrated device is its very low quiescent current that can be reduced to as low as 35uA in normal operation conditions. The low quiescent current makes it an excellent choice in low power applications and battery-driven devices. It has an operating temperature range of -40°C to +125°C, which makes it suitable for most application environments.

In addition, its low dropout voltage performances give NCV1117ST12T3 a competitive advantage and best-in-class output regulation of 1.2V for wide input voltage range.

Working Principle

The internal circuitry of the NCV1117ST12T3 contains an internal reference (1.2V) and an error amplifier. The internal reference has low temperature coefficients and good lineregulation performance, which enable the device to provide excellent output voltage stability.

In general operation, an external bias voltage is applied to the regulator, and a feedback loop is used to monitor and adjust the output voltage; the feedback signal is compared against the internal reference voltage and adjustments are made until the desired output voltage is reached.

The integrated output transistor employs a high-frequency architecture (pulse frequency modulation) with improved transient response and output voltage accuracy. Moreover, the device operates with a wide range of input voltages, up to 42V, making it suitable for a wide range of applications.

The NCV1117ST12T3 is complete with thermal protection, over-temperature protection, open-drain short-circuit protection and reverse battery protection features, making it highly reliable and robust in operation.

In conclusion, the NCV1117ST12T3 is an excellent choice for low-dropout, low-power applications where excellent output voltage regulation is needed. The device has a wide input voltage range, low quiescent current, fast transient response and a wide operating temperature range. Its integrated features and protections make it highly reliable and robust for a wide range of applications.

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