TPS76718QPWP

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The TPS76718QPWP is a linear voltage regulator integrated circuit (IC) from Texas Instruments (TI). It belongs to TI\'s family of low-power microprocessor-compatible voltage regulators, and it is designed for supplying microprocessors and other systems with low quiescent current consumption. The TPS76718QPWP enables designs that have a wide input voltage range and combines low-dropout regulator (LDO) and switch-mode power (PMOS) into a single IC. It is used in applications with 3.3V to 5V power supply, such as smartphones, tablets, and other mobile devices.

Features

• High-frequency operation up to 1MHz
• Wide input supply range of 2.5V to 6V
• Wide output voltage range of 0.75V to 5.5V
• Low output voltage variation over line, load, and temperature
• Low shutdown current of 0.01 μA
• High PSRR of > 60 dB
• Low output noise over a wide operating current range
• High reliability with HBM ESD protection of up to 2000 V
• True logic-controlled shutdown

Applications

• Mobile phones
• Tablets
• Industrial computers
• Consumer Products
• Point-of-load regulators
• Medical equipment
• Portable controllers
• Power management in battery operated systems

Working Principle

The TPS76718QPWP is a linear voltage regulator. It works using an internal PMOS output transistor which is driven by an internal error amplifier. The error amplifier monitors the output voltage and compares it with a reference voltage. If the output voltage is too low, the amplifier will turn on the PMOS output transistor, which will increase the current flow from the input to the output, thus providing more output voltage. If the output voltage is too high, the amplifier will decrease the current flow from the input to the output.

In addition, the TPS76718QPWP has protection features such as under-voltage lockout, current-limit protection, thermal shutdown, and soft-start. The under-voltage lockout feature prevents the device from turning on when the input voltage is too low or varies outside the acceptable voltage range. The current-limit protection prevents excessive current flow. The thermal shutdown feature turns off the output if the die temperature of the IC exceeds a preset threshold to avoid damage. The soft-start feature prevents the output voltage of the IC from overshooting the set value during start-up by slowly increasing the voltage over a specified time period.

Conclusion

The TPS76718QPWP is a low-power microprocessor-compatible linear voltage regulator IC that enables designs with a wide input voltage range and low quiescent current. It has many features that make it suitable for a variety of applications, including mobile phones, tablets, consumer products, and portable controllers. It works by monitoring and comparing the output voltage with a reference voltage, and then regulating the current flow from the input to the output accordingly.

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