S-1132B50-I6T2U

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PMIC (Power Management IC) is an ubiquitous embedded circuits which are regularly used for monitoring and controlling various power sources to ensure their efficient usage. Voltage Regulators are a subset of PMIC which are mainly used to regulate the voltage and current in the power system. In this article, we will focus on Linear Voltage Regulators and discuss the application field and working principles of the S-1132B50-I6T2U.

Linear voltage regulators are basic voltage regulators that use linear control schemes to step up and step down the output. It typically consist of an amplifier, a resistor and a transistor and control the output voltage by changing the duty cycle of the PWM signal and the voltage feedback loop. In comparison to switching regulators, linear voltage regulators offer greater efficiency and reliability, due to their lack of high-frequency components. The S-1132B50-I6T2U is a single channel linear voltage regulator from STMicroelectronics and it is designed for DC-DC step-down conversion.

The S-1132B50-I6T2U offer a wide operational voltage range from 2.5 V to 12 V, and it can provide adjustable output voltages from 0.7 V to VIN. It also has a maximum output current of 50 mA and can operate up to 1.2 MHz switching frequency. It includes various safety features such as input and output overvoltage protection, over-current protection, and under-voltage protection. The S-1132B50-I6T2U also feature high-side and low-side Pre-Bias start-up capability to enable smooth power transition to the load. These features make the S-1132B50-I6T2U an ideal choice for portable devices and applications with tight space constraints.

The S-1132B50-I6T2U uses a linear regulator topology to regulate the output voltage. The regulator has an internal amplifier and error amplifier that adjusts the reference voltage applied to an integrated P-Channel MOSFET to maintain the output voltage within the specified range. The regulator monitors the output voltage using a voltage divider circuit and adjusts the MOSFET gate voltage to adjust the regulation. This type of voltage regulator operates with no external components apart from the input and output capacitors.

The S-1132B50-I6T2U also features a low quiescent current of 1 μA. This means that when the output voltage is stable, the regulator only draws a small amount of current, which helps to conserve energy and extend battery life in applications that use batteries. In addition, during normal operation, the S-1132B50-I6T2U has a low output voltage ripple, helping to ensure reliable and stable operation of connected devices.

In conclusion, the S-1132B50-I6T2U is a single channel linear voltage regulator from STMicroelectronics that is designed for DC-DC step-down conversion. It has a wide operational voltage range from 2.5 V to 12 V and is capable of providing adjustable output voltages from 0.7 V to VIN. The S-1132B50-I6T2U also feature various safety features, a low quiescent current, and low output voltage ripple, making it an ideal choice for portable devices and applications with tight space constraints.

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