S-1137C21-U5T1U

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PMIC or Power Management Integrated Circuit Voltage Regulators help to maintain the preferred voltage in a device. Generally, the voltage regulator utilizes a linear voltage regulator, which are designed to constantly provide a desired voltage level to a circuit or device irrespective of the changes in the power conditions, such as change in current or input voltage. One such specific linear voltage regulator is S-1137C21-U5T1U.

Application Field and Working Principle of S-1137C21-U5T1U

The S-1137C21-U5T1U is a CMOS voltage regulator. It is an ideal choice for the circuits that require an input voltage of 1000 mA (or) more and an output current of 350 mA (or) more. It has excellent accuracy of 0.5% and fast response to dynamic changes in input voltage. The S-1137C21-U5T1U works in the range from 0.7V to 15V with a large operating temperature range of -40 to 85°C. It offers 3 different types of preset voltage settings to the user like 1.8V, 2.5V, and 3.3V. It features Ultra Low Drop Out Voltage of 160 mV @ 350mA and also offers excellent thermal protection and short circuit protection capabilities.

The S-1137C21-U5T1U regulator works on a simple principle of regulating the output voltage value by changing its input voltage value. It works by using its built-in voltage reference, which forms the base of its operation. When the input voltage is less than the output voltage, the regulator employs a feedback loop with the help of two resistors and two transistors. The two resistors work to control the voltage drop across the two transistors. When the voltage drop across the two transistors is below the value regulated by the voltage reference, the transistor amplifies the current and this results in the increase in output voltage. Conversely, when the input voltage is greater than the output voltage, the two transistors reduce the voltage drop across them and this reduces the output voltage. This mechanism helps to keep the output voltage at the desired value even when there are changes in the input voltage.

Therefore, the S-1137C21-U5T1U linear voltage regulator performs a useful role in many applications, where a constant and steady voltage supply is essential. It is primarily used in mobile phones, portable medical products, automotive and industrial equipments, servers, power supplies and embedded systems, where a steady control over the voltage output is necessary. Its ultra low dropout voltage, wide operating temperature range and excellent accuracy makes it an ideal choice in many voltage regulation applications. The S-1137C21-U5T1U is also easy to use, as it does not require any additional components for regulation, making it a reliable and cost-effective voltage regulator.

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