TPS75925KTTRG3

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TPS75925KTTRG3 Application Field and Working Principle

The TPS75925KTTRG3, a linear voltage regulator manufactured by Texas Instruments, is a part of the PMIC (Power Management Integrated Circuit) family. As a linear voltage regulator, it is designed to regulate voltage between 1.3V and 1.95V, and is recommended as a power supply for a variety of portable applications that run at low current load – such as cellular phones, PDAs, handheld gaming devices, and digital still cameras.

The TPS75925KTTRG3 contains a 5mm x 7mm thermally enhanced HVSON package, capable of high power dissipation. It is a triple output linear voltage regulator with two low drop-out (LDO) regulators and one step-down converter. The LDO outputs are adjustable from 1.15V to 1.95V, making it suitable for regulating lower voltage levels. The step-down converter’s output voltage can be adjusted from1.3V to 1.95V.

The operating temperature range for the device is from -40°C to 85°C. It is built with a low drop-out voltage of 300mV at 1A, optimizing efficiency at any output voltage. The TPS75925KTTRG3 also incorporates circuitry to protect the system from faults like short circuits, output overvoltage, and input undervoltage. Its fast transient response also eliminates the need for external compensation.

Working Principle

The TPS75925KTTRG3 works on a linear regulator principle, which is typical of linear voltage regulators. The central idea behind this working principle is to force a controlled current through a sense element (like a resistor or transistor) that is connected to the output of the regulator. The current through this sense element is compared with a reference voltage, and the difference between the two is used to adjust the regulator output voltage.

The regulator has two input terminals – the input voltage and the control voltage. The input voltage is usually an unregulated voltage or a conditioned regulated voltage (like 5V or 12V). The control voltage is generated by an external potentiometer or an internal DAC (Digital-to-Analog Converter). A stable reference voltage is used to reference both the control voltage and the sense element.

The voltage generated at the output of the regulator is determined by the ratio of the voltage across the sense element and the reference voltage. This ratio is determined by the current sourced from the control terminals. If the actual output voltage is lower than the desired voltage, the control current will increase and more current is forced through the sense element. This, in turn, increases the output voltage to the desired level.

The TPS75925KTTRG3 requires minimum external components, only an input filter capacitor and an output capacitor. This makes it an ideal solution for tight quarters, such as portable media devices. Additionally, the on/off enable control of the TPS75925KTTRG3 helps reduce power consumption in battery-operated applications.

Conclusion

The TPS75925KTTRG3 linear voltage regulator is designed to regulate voltages between 1.3V and 1.95V. It is engineered with a 5mm x 7mm thermally enhanced HVSON package and a low drop-out voltage of 300mV at 1A, making it suitable for low current load applications. It works on a linear regulator principle and needs minimum external components, reducing power consumption in battery-operated applications. With its wide range of features and applications, the TPS75925KTTRG3 is a popular choice for power supplies for a variety of portable applications.

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