TPS54350PWPG4

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PMIC (Power Management Integrated Circuits) have a wide range of applications in various sectors such as industrial, automotive, consumer electronics and telecommunications. The TPS54350PWPG4 is a high-performance synchronous buck regulator that operates with extremely low ON resistance integrated power MOSFETs.

The TPS54350PWPG4 device is among DC-DC switching regulators and it is designed for a wide range of applications. It is most suitable for applications such as point-of-load (POL) voltage regulators, telecom base stations, on-card point-of-load regulators and other high-current, low-voltage applicationsThe TPS54350PWPG4 is specially designed for mobile applications and other low noise, low quiescent current applications. It features two integrated power MOSFETs, reducing the external component count by half. The device can deliver up to 5A continuously and can support a wide input range of 4.5V to 20V.

It can provide an adjustable output voltage down to 0.8V and adjustable switching frequency up to 1MHz. It also incorporates an array of protection features such as cycle-by-cycle current limit, short-circuit protection, thermal shutdown and over-voltage protection. It is offered in a 28-pin VQFN package and is available with fixed output voltage options.

The TPS54350PWPG4 has a simple working principle. It consists of an internal power stage formed by two integrated power MOSFETs and a voltage control loop. It employs a synchronous rectified buck converter to deliver the output power. A triangle wave and an externally adjustable ramp voltage control the output voltage. The MOSFETs turn on and off based on the triangle wave and the ramp voltage.

The TPS54350PWPG4 has an active output voltage tracking loop. This loop transmits a signal to the ramp block which, in turn, adjusts the frequency by comparing the FB voltage and a dynamic voltage reference. This on-trace tracking loop helps the device to deliver high output accuracy over load and temperature changes.

The TPS54350PWPG4 device employs two 0.85V voltage supply regulators. These two regulators are used for the IC\'s essential logic and for the high-side controller and low-side driver, thus reducing the power losses and supplying a very low quiescent current. The power stage of the TPS54350PWPG4 is controlled by a signal generator which consists of two parts.The first part is the oscillator which works with a fixed frequency and is generated from the signal of a resistor connected at the RT pin, while the second part is the signal generator which is regulated by the FB pin. The signal generator is used to provide the signals to the integrated power MOSFETs.

The TPS54350PWPG4 device supports overshoot and undershoot current limit functions to protect its components from high current stress. If the current limit is triggered, the device will lower the switching frequency and this will reduce the output ripple amplitude, allowing the device to find a new operating point at a reduced current level. This will cause the output voltage to drop until the over-current limit is released.The TPS54350PWPG4 device also features an adjustable hardware soft-start function, which helps reduce the inrush current when turning on the device. The output voltage rises in a programmable rate from 0V up to the final voltage.

In summary, the TPS54350PWPG4 device is among the DC-DC switching regulators. It is built with two integrated low on-resistance power MOSFETs and has an adjustable output voltage down to 0.8V. It supports a wide operating input voltage range and is suitable for various applications such as point-of-load (POL) voltage regulators, telecom base stations, on-card point-of-load regulators and other high-current, low-voltage applications.

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