TPS53679RSBT

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PMIC(Power Management Integrated Circuit) technology has made an important breakthrough in the field of power management. With its mature technology and advanced design, it has solved many of the power management problems that have plagued digital products for years and become the most indispensable element for digital products. Among them, TPS53679RSBT is one of the PMIC products. It is mainly used for voltage stabilization in system level power supply and peripheral power supply, and often as a series voltage regulator. This article will discuss the application field and working principle of the TPS53679RSBT.

1. Application Field

TPS53679RSBT is mainly used for voltage regulation in system-level power supply and peripheral power supply, and can be used as a series voltage regulator. In terms of specific application scenarios, it can be used in the following fields:

• Network Communications:
  • 5G mobile broadband base station
  • Smart grid
• Computer:
  • desktop personal computer
  • Server
• Consumer Electronics:
  • D2D TV
  • Solid state drive
• Automotive:
  • Automotive mid-range ECU
  • ADAS sensors

2. Working Principle

TPS53679RSBT is a switching mode voltage regulator, which is mainly composed of control circuit, protection circuit, power switch, power transformer and other components. Its specific working principle is:

• Step 1： The output voltage of the voltage regulator is set by the feedback control loop. The output voltage of the regulator is sensed by the feedback signal and then compared with the reference voltage to determine the duty ratio of the power switch.
• Step 2：The power switch circuit composed of MOSFET drives and controls the conduction of the power switch. The output voltage is proportional to the duty cycle of the power switch.
• Step 3：The energy released by the power switch is transmitted to the power transformer and then rectified into a stable DC voltage.

The TPS53679RSBT voltage regulator has a wide range of operating frequencies. It can adjust the switching frequency according to the input, load and other parameters to minimize the size of the inductor and the output capacitor, and to improve the regulation performance of the voltage regulator.

3. Advantages of TPS53679RSBT

TPS53679RSBT voltage regulator has several features:

• High Current Output: The TPS53679RSBT is capable of providing up to 20A continuous current without requiring a large heatsink.
• High efficiency: The wide operating frequency range ensures that the regulator can deliver up to 95~98% efficiency.
• Low quiescent current operation: The TPS53679RSBT consumes only 0.4mA of quiescent current, ideal for battery-powered applications.
• Small size: The TPS53679RSBT is a highly integrated voltage regulator with small size.

4. Application Example

The TPS53679RSBT voltage regulator can be used in a variety of applications, such as in automotive mid-range ECU, 5G mobile broadband base station and other systems. The following is an example of using the TPS53679RSBT voltage regulator in an automotive mid-range ECU.

In order to ensure the stability of the mid-range ECU power supply system, a series of voltage regulators are needed for power supply chain regulation. The TPS53679RSBT is used as the main switch regulator to meet the current demand of 20A, and the output voltage is adjustable from 0.6V to 5.5V. At the same time, the switching frequency of the voltage regulator is adjustable according to the input, load and other parameters to effectively reduce the volume of the inductor and the output capacitor.

In general, the TPS53679RSBT voltage regulator is an ideal voltage regulator for system-level and peripheral power supply voltage regulation applications. Its adjustable operating frequency range and high current output capability make it suitable for any system power supply chain regulation.

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