TPS6755IDR

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TPS6755IDR is a single-chip synchronous step-down DCDC switching converter that is engineered to deliver up to 3A of continuous output current. It is optimized for low-cost and small-footprint AC/DC wall adapter and adapters for consumer electronics, such as digital cameras. It has a wide input voltage range of 3.4V to 40V, providing 4.5V to 36V output voltage range. TPS6755IDR provides low output ripple and high accuracy, low quiescent current, and low EMI operation features.

Application Field

TPS6755IDR is ideal for many consumer electronics applications, such as digital cameras and AC/DC wall adapters; and also for battery charging applications or low-power lighting. The synchronous step-down DCDC switching converter is specifically designed for portable applications with high efficiency and low power dissipation. It suits best for powering embedded systems with low power requirements.

The integrated power switch consists of an N-channel MOSFET, which offers the benefits of high current drive capability and peak efficiency levels. This makes it suitable for point-of-load power conversion in notebook PCs, peripherals and other applications.

Working Principle

The step-down DC/DC switching regulator includes an input supply voltage, an output voltage, and a switching circuit connected between the input and output voltages. The switching circuit contains a voltage regulator, an inductor and a MOSFET switch. When an input voltage is applied to the DC/DC converter, the voltage regulator will regulate the voltage to the desired level. The MOSFET switch operating together with the inductor will convert the input voltage to the desired output voltage.

The MOSFET switch is turned on and off periodically. During the on-time, the inductor stores energy from the input voltage source, then releases it to the output load during the off-time. This type of switching regulator is known as a Buck converter. The inductor acts as a current source and will generate less noise as compared to regular linear regulators.

In addition to the power conversion, the TPS6755IDR includes protection functions such as adjustable overcurrent protection, adjustable overvoltage protection and over-temperature protection. A power good flag is also included. This feature indicates when the output voltage is within the valid range. The switching frequency is adjustable and the device can optimize performance by utilizing the external components. It also offers excellent DC Accuracy.

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