S-85S1PD18-I8T1U Integrated Circuits (ICs)

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PMIC (Power Management Integrated Circuits) play a critical role in overall system health and performance, and DC-DC switching regulators are a key component within the overall design of power management integrated circuits. The S-85S1PD18-I8T1U from Panjit International Corp. is a power IC regulator intended for use in the output of smartphone batteries and portable battery-powered equipment.

The S-85S1PD18-I8T1U DC-DC switching regulator is an integrated circuit designed to regulate an output voltage from a given input, typically a battery. It uses a voltage regulator to ensure that the voltage is kept constant through the process of PWM (pulse-width modulation). This is accomplished by switching the transistor on and off rapidly, resulting in an average output voltage that is determined by the duty cycle of the pulse.

The S-85S1PD18-I8T1U regulator is a 4.4A / 4.5A peak synchronous step-down converter with an input voltage of 3.5 to 18V and an output voltage of 0.8 to 4.5V. It features ultra-low quiescent current (3uA) to reduce standby power consumption and a wide input voltage range. It also features a DC offset mechanism that reduces current intake in light load conditions and an integrated Quiet-tone™ Noise Reduction Technology for low EMI (electromagnetic interference) and improved efficiency.

S-85S1PD18-I8T1U is a highly integrated solution with a typical efficiency of 95%, making it suitable for use in applications that powered by batteries, such as smartphones, tablets, wearables, and portable consumer electronics. It has an adjustable output voltage and excellent line and load regulation, as well as low bill-of-materials and fast transient response, making it an excellent choice for demanding battery-powered applications.

The PRM protection function of the S-85S1PD18-I8T1U prevents overcurrent damage due to output short-circuiting, overloads or over-voltage conditions. It has built-in over-temperature protection circuitry that shuts down the regulator when the die temperature reaches 150°C. In addition, it features over-voltage protection and tracking, as well as soft-start and fold-back current limiting.

The S-85S1PD18-I8T1U DC-DC switching regulator is a versatile, highly integrated solution with low quiescent current consumption, excellent line and load regulation, and a wide range of protection features. This makes it an ideal choice for applications requiring both reliability and efficiency, such as portable store equipment, power banks, and battery-powered consumer electronics.

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