TLV713285PDBVT

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TLV713285PDBVT Application Field and Working Principle

TLV713285PDBVT is a low dropout (LDO) linear regulator from Texas Instruments. It is part of the TLV713285 family, a fixed output voltage, low dropout voltage and low quiescent current device, ideal for many low noise power supply applications especially those with few external components. It offers automatic input voltage down to 2.8V and operates up to 6.5V range.

Application Field

The TLV713285PDBVT electric current regulator is suitable for a wide range of handheld, battery-operated applications such as cellular phones and digital cameras. Its low dropout voltage ensures stable operation for applications even when the main power source voltage is close to the output voltage. Furthermore its low quiescent current operation makes it ideal for battery powered applications.

In addition, low noise and ripple is also important in some audio applications. The TLV713285PDBVT provides extremely low noise of less than 500uVrms and an extremely low output noise peak-to-peak of 30uVrms, making it suitable for such applications.

Working Principle

Overall, the TLV713285PDBVT is a precision voltage reference which delivers a well-regulated output voltage that is set by an external resistor divider. The TLV713285PDBVT provides current regulation by means of a linear feedback circuit, which is connected between the Output and the Error amplifier\'s inverting input. The Error amplifier senses the output voltage and amplifies the difference between the Error amplifier\'s inverting input and its non-inverting input reference voltage.

When the output drops below the reference voltage, the Error amplifier makes its output higher and the TLV713285PDBVT increases the output current. To the contrary, when the output voltage rises above the reference voltage, the Error amplifier makes its output lower and the TLV713285PDBVT decreases the output current. Thus, it leads to the maintenance of the output voltage even when the load current is varied.

The TLV713285PDBVT has a differential pass element within its feedback loop that provides a low-pass filter action. This low-pass filter helps reduce the high-frequency noise commonly found in linear regulation circuits.

Other design considerations are also incorporated into the TLV713285PDBVT, such as thermal protection, overcurrent protection, and a Current Limit circuit. These details allow the TLV713285PDBVT to provide an excellent, robust package for low noise, economical power supply solutions.

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