TPS51313DRCT Integrated Circuits (ICs)

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TPS51313DRCT is a synchronous, step-down DC-DC converter operating from input voltage sources of 4.75 V to 13.2 V. It can deliver up to 3 A continuous output current with output voltages as low as 0.6 V. It operates at high efficiency at light loads with a high-speed current-mode control architecture and a low ripple Burst Mode® operation. With a wide input voltage range, high switching frequency and low ripple, TPS51313DRCT is ideal for a variety of applications such as portable medical, industrial, computing and wireless communication.

Application Field of TPS51313DRCT

TPS51313DRCT is a synchronous, step-down DC-DC converter operating from an input voltage source of 4.75 V to 13.2 V. It is ideal for applications requiring high-efficiency at light loads, such as portable medical, industrial, computing and wireless communication applications. With its wide input voltage range and high switching frequency, it can be used in applications where a low noise and high efficiency output is desired. It also supports a single output as low as 0.6 V with a 3 A (max) current rating. Furthermore, its low ripple Burst Mode operation and current-mode control architecture enable it to achieve a high level of performance in many different applications.

Working Principle of TPS51313DRCT

The TPS51313DRCT DC-DC converter utilizes a buck switching topology. The buck converter uses an inductor and two switches to convert a higher input voltage to a regulated lower output voltage. The two switches, labeled SW1 and SW2 (or Q1 and Q2), are usually implemented as an H-bridge with two transistors and two diodes as shown in Figure 1. The TPS51313DRCT supports a low ripple Burst Mode operation and a current-mode control architecture.

In normal operation, switch SW1 conducts first and then switch SW2 conducts after a short dead time of the switching cycles. This causes the output voltage to be lowered. During the second half of the switching cycle, the inductor current flows through the body-diode of SW2 and the output capacitor. This allows the output voltage to remain regulated, at the desired level.

The switching frequency of the TPS51313DRCT is adjustable depending on the application. The frequency can be set from 200 KHz to 2 MHz with an external resistor. The current limit is also adjustable depending on the application. An internal feedback loop regulates the output voltage and the current limit for a constant voltage and current output.

Conclusion

The TPS51313DRCT is a synchronous, step-down DC-DC converter that operates from an input voltage source of 4.75 V to 13.2 V. It can deliver up to 3 A continuous output current with output voltages as low as 0.6 V. It offers a wide input voltage range, high switching frequency and low ripple, making it ideal for a variety of applications such as portable medical, industrial, computing and wireless communication. The switching frequency is adjustable and the current limit is also adjustable depending on the application. The TPS51313DRCT supports a low ripple Burst Mode® and a current-mode control architecture for high performance in many different applications.

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