TPS61254YFFR

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TPS61254YFFR Application Field and Working Principle

The TPS61254YFFR is a DC-DC switching regulator designed and manufactured by Texas Instruments Incorporated. It provides wide input voltage range and high efficiency at light loads (down to 0.1% or lower). TPS61254YFFR has wide input voltage range of 4.5V to 28V and operates with a wide range of output voltages. It is capable of delivering a regulated output current up to 5A. Its low quiescent current of less than 1A allows it to operate even in extreme light load condition. In addition, the TPS61254YFFR offers superior ripple rejection and excellent line and load dynamic response.

Features

• Wide input voltage range: 4.5V to 28V
• High efficiency at light loads (down to 0.1% or lower)
• Capable of delivering output current up to 5A
• Low quiescent current below 1A
• Excellent ripple rejection
• Excellent line and load dynamic response

Application Field

The TPS61254YFFR switching regulator can be used in applications that require a wide input voltage range and high efficiency at light loads. It can be used in portable devices such as smartphones, tablets, and wearables. It is suitable for IoT and other connected devices. It can also be used in industrial and medical instruments, vehicles, and other applications where reliability and efficiency are of high importance.

Working Principle

The TPS61254YFFR is a buck-boost switching regulator. It works with input voltage that is above, below, or equal to the regulated output voltage. It takes a DC input voltage and produces an efficient, regulated DC output voltage. Its main components are an inductor, a switching device (MOSFET), and a control circuit. The TPS61254YFFR operates in fixed frequency PFM (pulse frequency modulation) mode. It is a current mode, charge mode control, which means that it measures the current through the inductor and adjusts the duty cycle of the switching device accordingly. The duty cycle is regulated by the control circuit to produce the desired output voltage.

The TPS61254YFFR switching regulator can operate in either normal mode or a skip mode which is used to optimize efficiency at low input voltage and low load current. When in normal mode, the switching regulator operates at a fixed frequency and duty cycle to provide a stable output voltage. In skip mode, the switching regulator changes its operating frequency to improve efficiency at light loads. It lowers the switching frequency to reduce the switching loss and has a built-in quiescent current step down feature that further reduces the quiescent current to a negligible value below 1mA.

Conclusion

The TPS61254YFFR from Texas Instruments Incorporated is a reliable, high performance DC-DC switching regulator that is suitable for a wide range of applications. It has wide input voltage range of 4.5V to 28V and a regulated output current up to 5A. It is highly efficient even at light loads and offers superior line and load dynamic response. Its low quiescent current of less than 1A and skip mode capabilities make it an ideal choice for applications that require low power consumption.

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