TS30011-M025QFNR

Voltage - Input (Max):	24V
Supplier Device Package:	16-QFN (3x3)
Package / Case:	16-VFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	1MHz
Current - Output:	1A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.5V
Series:	--
Voltage - Input (Min):	4.5V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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TS30011-M025QFNR Application Field and Working Principle

The TS30011-M025QFNR is a DC-DC switching regulator from Texas Instruments, categorized as a PMIC (Power Management IC). This regulator utilizes a constant on-time (COT) topology in order to provide a low output noise, low drop-out voltage, and fast transient response. It provides ripple rejection up to 50 dB, input voltage range from 3.2 V to 3.6 V, and adjustable output voltage range of 0.6 V to 3.3 V. This regulator also features over-temperature, over-current, and under-voltage protection for uninterrupted operation.

Practical Applications

DC-DC switching regulators play an important role in powering and regulating a variety of electronic systems. The TS30011-M025QFNR is an excellent choice for applications such as portable electronics, industrial control, networking and other low-voltage systems where low power consumption and high efficiency is a must. Additionally, this regulator is suitable for automotive applications, as it features a reverse battery input protection function.

Design Guidelines

When designing a circuit around the TS30011-M025QFNR, it is important to take into consideration the following parameters: output voltage, output current, load step transients, noise, efficiency and temperature. The output voltage can be adjusted with a voltage divider; however, the accuracy of this regulation is dependent on the tolerance of the resistor values. The output current can be determined by calculating the total output power, dividing by the output voltage, and accounting for the efficiency of the regulator. The actual load step transients must also be taken into consideration, as these can cause large transient variations in the output current. It is also important to ensure that the regulator does not produce too much noise, as this might interfere with other sensitive circuitry in the system. The efficiency of the regulator depends on the input/output voltage difference, so it is important to ensure that both are within the specified operating range. Finally, the regulator must be able to withstand the ambient operating temperature without exceeding the specified temperature range.

Working Principle

The TS30011-M025QFNR employs a COT topology, which utilizes a constant on-time control architecture. This topology ensures a low drop-out voltage and fast transient response while providing excellent ripple rejection. The device also features over-temperature, over-current, and under-voltage protection, as well as a reverse battery input protection function.The operating principle can be broken down into three main stages: the input stage, the control stage, and the output stage. The input stage is where the input voltage is regulated to ensure a stable and clean power supply. The control stage is where the constant on-time window is defined and set. The width of the window dictates the duty cycle and thus the output voltage. Finally, the output stage is where the duty cycle is applied to the switching FET in order to regulate the output voltage.

Conclusion

The TS30011-M025QFNR is a high-performance DC-DC switching regulator that can be used in a wide range of applications. Its constant on-time topology ensures low drop-out voltage, low noise, and excellent ripple rejection, making it an ideal choice for powering low-voltage systems. Designers must keep in mind the parameters discussed above in order to ensure an efficient and reliable circuit.

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