TPS78825DBVR

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The TPS78825DBVR is a low-noise, high-performance, low-dropout linear regulator (LDO) from Texas Instruments. It has an output voltage that is adjustable from 0.8V to 5.5V. This linear regulator can be powered from sources ranging from 1.4 V to 5.5 V. The excellent power supply rejection ratio is superior to the TPS78225 with the same output voltage. The TPS78825DBVR is suitable for a wide range of applications, including DSCs, DTVs, and general-purpose logic.

Application Field

The TPS78825DBVR linear regulator solves tough power supply noise issues. It is used in many devices to improve power supply noise, such as digital still cameras, digital TVs, and general-purpose logic. It has superior power supply rejection, so it can reduce the radiated noise in these kinds of digital products.

The high current output for its compact size makes the TPS78825DBVR ideal for applications that require higher current in limited space. It can be used in battery-powered portable devices, such as cell phones and digital cameras, due to its low dropout voltage and low quiescent current.

Working Principle

The TPS78825DBVR linear regulator uses a differential amplifier to regulate the output voltage. The positive input of the differential amplifier is connected to the voltage reference and the negative input is connected to the output voltage. When the voltage at the negative input rises higher than the voltage at the positive input, the circuit begins to amplify the discrepancy, thus reducing the current flowing through the output device and stabilizing the output voltage.

The circuit also includes active current limiting, thermal shutdown, and disable functions. Active current limiting protects the circuit from being overloaded. The thermal shutdown function protects the device from thermal runaway. The disable function allows the device to be turned off when not in use.

The TPS78825DBVR linear regulator also features ultra-low noise performance because of its low-noise design, which prevents the generated noise from affecting other circuits. This makes it the ideal choice for applications that require low-noise performance.

The TPS78825DBVR is an efficient and reliable low-dropout linear regulator. It features excellent power supply rejection, high current output, and low quiescent current. Its low-noise performance also makes it suitable for noise-sensitive applications. Its wide range of applications and working principles make TPS78825DBVR an ideal choice for low-noise, low-dropout, and high-performance linear regulators.

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