TPS62748YFPR

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TPS62748YFPR Application Field and Working Principle

The TPS62748YFPR device from Texas Instruments is a high-efficiency, tiny/low-noise step-down converter that has a wide range of applications. It provides a low quiescent current and excellent power efficiency over a wide range of load currents. This makes it the ideal choice for a wide range of applications, including automotive, portable devices, wireless charging and battery management systems. This step-down converter is designed for operation from a 2.6V to 5.5V input voltage range and a maximum output voltage of 3.3V. The device has an output accuracy of ±1.5% and a maximum output current of 3.5A. It also features a power-save mode, which reduces the quiescent current to just 2µA.

Background

DC-DC converters are used to convert a DC voltage from one level to another. Step-down converters, such as the TPS62748YFPR, are used to reduce the output voltage from a higher input voltage. DC-DC converters are typically used in a variety of portable and automotive applications, such as smartphones, PDAs, digital cameras, and automotive batteries.

Working Principle

The TPS62748YFPR is a buck (step-down) converter that works on the principle of pulse-width modulation (PWM). It uses an internal high-side switch and a low-side switch to regulate the output voltage according to the set point. The internal high-side switch is capable of switching up to 35V and the low-side switch is capable of switching up to 5.5V. At the start of each switching cycle, the high-side switch is turned on, which connects the input voltage to the output of the converter. The duty cycle of the PWM signal determines the output voltage. The duty cycle is adjusted based on the output voltage feedback signal. The low-side switch is turned on after a predetermined time to complete the cycle and disconnect the input from the output.

Applications

The TPS62748YFPR is ideally suited for applications that require a wide input voltage and a low output voltage such as automotive, telecommunication systems, battery management systems, and wireless charging. The extremely low quiescent current and excellent efficiency make it the perfect choice for power-sensitive designs.

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