TL750M08CKVURG3

TL750M08CKVURG3 Application Field and Working Principle

The TL750M08CKVURG3 belongs to the power management integrated circuit (PMIC) category, specifically voltage regulator or linear type. It is developed by Texas Instruments company and comes in a very efficient, small-form-factor 8-pin package. It implements positive and negative voltage regulation with high accuracy. It is designed to provide either high current dual voltage supplies, or single voltage with low dropout voltage and high current capability.

Features of TL750M08CKVURG3

• Bipolar output regulators
• Maximum output current up to 1.5A
• Low input voltage start up voltage range: +1.5 V to 18V
• Input to output differential voltage of 1.25V (typ.).
• Excellent line/load regulation
• Output voltage accuracy of 0.8% (typ.), 1.2% (max.).
• High power supply rejectio ratio (PSRR) of 80 dB (typ.)
• Stable with a variety of low ESR ceramic capacitors.

Applications

The TL750M08CKVURG3 is a versatile and powerful integrated circuit, suitable for a wide range of applications. Its dual output capabilities combined with its low input start up voltage range make it attractive for systems where one voltage need to be supplied at a lower voltage, such as computer peripherals, cameras and tools. Its low dropout voltage and high current capability make it desirable for automotive circuits, such as temperature and speed control systems. Its high PSRR makes it excellent for use in noise-sensitive systems, such as portable handheld audio devices.

Working Principle

The TL750M08CKVURG3 operates under the classic LM317 voltage regulator configuration, which works as an adjustable voltage regulator, using single resistor to set the voltage. The voltage regulator consists of three parts: the input, the output, and the feedback circuit. TheLM317 includes an internal pass element operating as a variable resistor between the input and output, thus controlling the output voltage. The output voltage is determined by a voltage divider network consisting of two resistors and a voltage reference. The TL750M08CKVURG3 pass element adjusts its resistance automatically in order to keep the voltage across the feedback network constant.

The TL750M08CKVURG3 input is connected to a source of unregulated DC voltage. The adjustable output is generated between the output pin and the ground. The adjustable voltage is created in the voltage divider network by connecting a reference voltage to the regulator’s feedback pin. The reference voltage goes to the non-inverting input terminal of a voltage comparator. The inverting input terminal is connected to the voltage divider network. The voltage at the junction of the resistors R1 and R2 is sensed by the TL750M08CKVURG3. A voltage amplification stage amplifies the output of the voltage comparator and sends the signal to the error amplifier input. The error amplifier output is then used to adjust the resistance of the pass element.

The TL750M08CKVURG3 is specifically designed for high current, low voltage applications. Its small package size and low dropout voltage make it an ideal solution for the high power, small form factor designs. Its dual output supply capability make it suitable for use in applications requiring two voltages from a single input source, such as cameras or peripherals.