SI9185DMP-25-T1-E3

Introduction to SI9185DMP-25-T1-E3 Application Field and Working Principle

The SI9185DMP-25-T1-E3 is a linear voltage regulator from Signetic’s IC family which provides highly efficient and cost-effective voltage regulation for battery-powered, low-power applications. This article is intended to provide an understanding of the application field and working principle of the SI9185DMP-25-T1-E3.

Application Field of the SI9185DMP-25-T1-E3

The SI9185DMP-25-T1-E3 is well-suited for many low-power applications, including battery-powered as well as automotive, industrial and consumer/computer applications. It features adjustable output voltages from 2.3V to 5.5V, ideal for powering microprocessors, DSPs, voltage detectors, charge pumps and other low power components. In addition, its integrated on-chip safeguards including overvoltage, overcurrent and overtemperature protection ensure reliable operation under extreme operating conditions.

The SI9185DMP-25-T1-E3 is particularly beneficial in automotive applications, where its TSSOP-14 package and low quiescent current provide an ideal solution for automotive electronic control units and battery-management systems. Furthermore, the device offers fast turn-on transient response and load regulation, as well as good line/load transient characteristics, making it suitable for use in portable and stationary applications.

This regulator features low dropout voltage and a wide range of operating temperature from -20°C to +125°C, making it suitable for use in harsh environments. Its integrated current-limiting circuit and shut-down feature are also welcome features in automotive applications, as are its low oscillation frequency, low noise and fast response features.

Working Principle of the SI9185DMP-25-T1-E3

The SI9185DMP-25-T1-E3 is an integrated, low-dropout voltage regulator that can produce a variety of output voltages up to 5.5V. The device operates by drawing power from a source, such as a battery, and converting it to the required output voltage.

The device has several core components, including a voltage divider, a voltage amplifier, a PNP and NPN transistors, and a current source. The voltage divider serves to sense the input voltage and compare it to the reference voltage, while the voltage amplifier amplifies the output voltage to match the programmed voltage.

The PNP and NPN transistors act as switches. When the voltage sensed by the voltage divider is lower than the reference voltage, the PNP transistor is switched on, allowing current to flow from the input to the output. When the input voltage is higher than the reference voltage, the NPN transistor is switched on, diverting current away from the output and powering the device’s built-in current source. This current source is used to adjust the output voltage to match the programmed voltage.

The SI9185DMP-25-T1-E3 is a simple, yet effective voltage regulator that can be used in a variety of applications. Its extremely low dropout voltage, high efficiency and wide range of operating temperatures make it an ideal choice for low-power applications, particularly in automotive applications.

Conclusion

The SI9185DMP-25-T1-E3 is a linear voltage regulator from Signetic’s IC family. Its extremely low dropout voltage, high efficiency and wide range of operating temperatures make it an ideal choice for low-power applications, particularly in automotive applications. With adjustable output voltages from 2.3V to 5.5V, it is well-suited for powering microprocessors, DSPs, voltage detectors, charge pumps and other low power components. In addition, its integrated on-chip safeguards, including overvoltage, overcurrent and overtemperature protection, ensure reliable operation under extreme operating conditions.