ST1S12G18R Integrated Circuits (ICs)

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ST1S12G18R is a part of STMicroelectronics’ voltage regulators product line, in specific, DC DC switching regulators. The ST1S12G18R is a small, low capacitance, low-voltage, low-power smart switch ideal for protection and bandwidth management as part of a voltage regulator system. The device is designed to provide both protection and control, with an accurate under-voltage lockout (UVLO) threshold and adjustable voltage reference. The device can operate up to 12A continuous current or 18A peak current and is designed to meet a wide range of applications where a compact, low-voltage regulator is required. The internal comparator can switch up to 400V and has a low quiescent current of only 5µA, making it suitable for battery-powered systems. Additionally, the design of the switch contains a wide range of features that make it an ideal choice for powering low-voltage systems. These features include: over-current, over-voltage and over-temperature protection; integrated dead time control for greater stability; programmable slew rate, preventing current overloads; adjustable under-voltage lockout and dual-mode control logic for both PWN and linear voltage regulation. The ST1S12G18R is best suited for applications requiring accurate voltage regulation, such as mobile phone charger systems, LCD and LED backlighting, USB port power management, automotive safety systems, and many more. The switch is available in SOT-23 package, allowing for an overall small form factor. This makes it suitable for small, space restricted applications. The operating temperature range of the device is -40°C to 85°C, which makes it a reliable and resilient choice. The working principle of the ST1S12G18R is simple and straightforward. The switch consists of a high-side MOSFET controlled by an internal comparator. The input voltage is provided to the comparator, which compares it to a reference voltage set by the user. When the input voltage is higher than the reference voltage, the comparator will switch the MOSFET on, allowing current to flow to the output. When the input voltage drops below the reference voltage, the MOSFET opens, blocking the current and stopping the output voltage from dropping. This ensures that there is a stable output voltage, even when the input voltage varies significantly. The ST1S12G18R is an ideal choice for a vast range of applications that require accurate and reliable voltage regulation. Whether it is used to power a mobile phone charger system, automotive safety system, or a basic voltage regulator, the ST1S12G18R is sure to provide a reliable, safe and efficient solution. Its small form factor and wide operating temperature range makes it an ideal choice for small, space-restricted applications.

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