onsemi NCV1117DTARKG: Technical Datasheet and Application Circuit Overview

The onsemi NCV1117DTARKG is a popular low-dropout (LDO) linear voltage regulator renowned for its reliability, ease of use, and robust performance in a wide range of automotive and industrial applications. This component delivers a fixed 5.0V output with a maximum current of 1A, making it an ideal choice for powering microcontrollers, sensors, and other logic circuits that require a stable and clean voltage supply.

A key feature of this regulator is its low dropout voltage, which is typically 1.2V at full load current. This allows the device to continue regulating the output voltage effectively even when the input voltage dips to a level very close to the output, enhancing efficiency and extending operational range in battery-powered or noisy environments. Furthermore, the NCV1117DTARKG is designed to meet stringent automotive qualifications, offering exceptional performance under the harsh conditions typical of automotive electronics, including wide temperature fluctuations and significant electrical noise.

The device incorporates essential protection mechanisms to ensure system safety and longevity. These include internal current limiting to safeguard the regulator and the load during overload conditions and thermal shutdown to prevent damage from excessive junction temperature.

Application Circuit Overview

The standard application circuit for the NCV1117DTARKG is straightforward, requiring only a few external components for stable operation. The basic configuration includes input and output capacitors to ensure stability and improve transient response.

Input Capacitor (C_IN): A 10µF tantalum or aluminum electrolytic capacitor is recommended to be placed close to the input pin. This capacitor helps to smooth any input voltage ripple and is crucial for circuit stability.

Output Capacitor (C_OUT): An output capacitor is required for stability. The datasheet specifies a minimum of 22µF tantalum capacitor on the output to guarantee stability and proper transient response. A larger value can be used for applications with higher transient load demands.

The adjustable version of the 1117 family allows for custom output voltages using two external resistors, but the NCV1117DTARKG fixed version simplifies design by integrating the voltage setting resistors internally.

ICGOODFIND Summary: The onsemi NCV1117DTARKG stands out as a highly reliable, automotive-grade LDO voltage regulator. Its combination of low dropout voltage, fixed 5V output, and built-in protection features makes it an excellent and simple solution for providing stable power in demanding electronic systems.

Keywords: Low-Dropout (LDO) Regulator, Automotive Grade, Fixed 5V Output, Current Limiting, Thermal Shutdown.