S-1137B28-I6T2U Integrated Circuits (ICs)

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Linear voltage regulators are one of the most common type of power management integrated circuits (PMIC) used in a variety of electronic products. They offer a number of advantages, including their ability to regulate voltage and provide isolation from circuit loading and variable input voltage. The S-1137B28-I6T2U is a linear voltage regulator designed for application in a broad range of industrial, medical and consumer electronics products. This article will discuss the application field and working principle of the S-1137B28-I6T2U regulator.

Application

The S-1137B28-I6T2U is a linear voltage regulator mainly used in industrial and medical products such as PID controllers, safety sensors, analytical instruments and medical diagnostic equipment. It is also suitable for use in consumer products such as computer peripherals, digital communication devices, portable audio and video players, andmechanical or electrical appliances. It features a wide supply voltage range of 2.5 V to 28 V, a broad output voltage range of 0.8 V to 26 V, low quiescent current of 1.2 mA, high power dissipation of 2.25 W and a wide range of temperature support from -20°C to +125°C. It has an input for undervoltage lockout, input for overvoltage preprotection, and output for post-regulating current limit. The regulator is certified to the industrial standard IEC60950.

Working Principle

The S-1137B28-I6T2U is a linear voltage-regulator IC with an adaptive on-chip voltage reference. It operates with an input voltage between 2.5 V and 28 V, and an output voltage adjustable from 0.8 V to 4 V with a ±2% accuracy. It also provides a precision voltage regulator in the form of two-terminal Zener diode on its own package. It is designed with a current sense circuit and a load line regulation circuit which helps to ensure stability and accuracy in the output voltage.

The regulator works on the principle of controlling the output voltage by comparing the reference voltage to the output voltage. The reference voltage is provided by an external power supply or a precise voltage regulator on the chip. When the output voltage is lower than the reference voltage, the regulator increases the current, and when the output voltage is higher than the reference voltage the regulator decreases the current. The current limit and thermal shut-off circuits of S-1137B28-I6T2U are designed to protect the IC from over-current and overheating. The device also has an undervoltage lockout circuitry provides overvoltage protection.

Conclusion

The S-1137B28-I6T2U is a linear voltage regulator designed for industrial and medical applications. It offers a wide supply voltage range of 2.5V to 28V and output voltage from 0.8V to 26V. It features low quiescent current, high power dissipation, and wide temperature support. It works on the principle of controlling the output voltage by comparing the reference voltage to the output voltage. The current limit and thermal shut-off circuits are designed to protect the device from over-current and overheating. It is certified to the industrial standard IEC60950.

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