TPS54340QDDARQ1

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TPS54340QDDARQ1 is a DC-DC switching voltage regulator in the power management integrated circuit (PMIC) family. It is widely used in the field of mobile devices, and has a wide range of applications such as laptop computers, notebooks and tablet computers. The chip can provide an isolated 3A output current solution and is equipped with synchronous rectifier. It is a high performance switching-mode power supply (SMPS) with wide input range and excellent transient response.

The TPS54340QDDARQ1 is a synchronous buck converter designed for point of load (POL) applications. It provides a precise output voltage of 0.86V with a wide input range of 4V to 28V. The device is highly efficient and has a low quiescent current, making it ideal for portable applications. The input under-voltage lockout (UVLO) ensures safe start up and it also has a built-in current limit, overtemperature protection and output voltage accuracy.

The TPS54340QDDARQ1 features a high switching frequency of 2.5 MHz, enabling high power density with small footprint inductors and capacitors. The switching regulator uses an internal oscillator, eliminating the need for external clock components. It offers programmable current sensing and power good capability. The device also offers output voltage tracking, where the output voltage can be pre-programmed to follow the input voltage.

The TPS54340QDDARQ1 includes a controller, a power switch and an inductor in a single package. The controller is based on a proprietary topology and includes a power switch, an inductor, a switch mode controller and loop compensation. The controller also offers an internal compensation circuit to ensure stability and a wide-range dynamic load response. The included power switch features low RDS (ON) and is designed to maximize efficiency. The included inductor provides high efficiency at high switching frequency and is optimized for low profile.

The working principle behind the TPS54340QDDARQ1 is based on a cycle by cycle current mode controller. The controller pulses the power switch to regulate the output voltage when a load is applied. When the switch opens, energy stored in the inductor is transferred to the output capacitor, providing the load current. During the off-time of the power switch, the inductor current will be reverse, and the energy will be transferred to the output through the diode.

The TPS54340QDDARQ1 buck converter includes many features such as a wide 4V - 28V input voltage range and a precise 0.86V output voltage, making it an ideal DC-DC converter solution for mobile device peripherals. The device’s high switching frequency enables small packages, allowing for higher power density, reducing form factor. And with its built-in protections, such as current limit and an overtemperature, it ensures safe and reliable operation for any application.

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