TLV70028DSET

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TLV70028DSET Application Field and Working Principle

Linear voltage regulators are widely used in power management integrated circuits (PMIC) to convert voltage. The TLV70028DSET is a fixed-voltage regulator part of the TLV700 family of low-dropout linear regulators from Texas Instruments. This voltage regulator was designed to provide high efficiency with an ultra-small footprint, making it suitable for applications such as mobile phones, tablets, and other portable devices.

Overview

The TLV70028DSET is a low dropout linear voltage regulator in a QFN package with a low quiescent current operation, low dropout voltage, and a fast transient response. This regulator has a high PSRR, which helps eliminate noise on the power line in the presence of a noisy power source. It has a wide input voltage range of 1.5V to 6.0V, and its output voltage is adjustable from 0.6V to 5.0V, making it suitable for applications such as portable devices, which often require low voltage and high efficiency. The high open loop gain of this regulator helps it to achieve high precision regulation, minimizing the output tolerance and minimizing load regulation. The TLV70028DSET is available in the ultra-small and low profile QFN package, measuring only 2mm x 2mm x 0.5mm and has an EMI shielded option for improved EMI performance.

Features

The TLV70028DSET features a wide input voltage range, high PSRR, fast transient response, and overcurrent protection. The input voltage range is wide from 1.5V to 6.0V, making it suitable for use with various power inputs and various applications. The high PSRR of this regulator makes it ideal for use in the presence of noisy power source. The fast transient response ensures that the output voltage remains stable during transient changes in the input voltage or load. Overcurrent protection is included to protect the regulator from overloads.

Application Field

The TLV70028DSET is suitable for use in a wide range of applications, such as mobile phones, tablets, and other portable devices. It is ideal for use in portable systems, due to its low dropout voltage, wide voltage range, and low quiescent current operation. The ultra-small QFN package and the optional EMI shielding make it perfect for high density portable applications. This regulator is also suitable for automotive systems, thanks to its wide input voltage range and high PSRR.

Working Principle

The TLV70028DSET is a linear voltage regulator. This device uses a NPN bipolar transistor to process incoming voltage and then convert it to the desired output voltage. The input voltage is applied to the base of the transistor and the output voltage is taken from the collector of the transistor. The output voltage is determined by the setting of the resistor divider connected to the feedback pin. The current flowing through this divider sets the voltage, which is compared to the internal reference voltage of the regulator and the output voltage is adjusted accordingly. The current flowing to the output is controlled by the gain of the amplifier in the regulator.

The TLV70028DSET features a low quiescent current operation and low dropout voltage, resulting in a high efficiency of operation. This regulator also features a fast transient response, which enables it to quickly respond to changes in the input voltage or load and hold the output voltage stable. The high open loop gain of this regulator ensures high precision regulation, allowing low output voltages with minimal tolerance.

Conclusion

The TLV70028DSET is a low dropout linear voltage regulator from Texas Instruments. This regulator is suitable for use in applications such as mobile phones, tablets, and other portable devices due to its wide input voltage range, high PSRR, low dropout voltage, and low quiescent current operation. The fast transient response and high open loop gain ensure high precision and accurate operation. With its ultra-small package and optional EMI shielding, the TLV70028DSET is ideal for use in high density applications. This product is also suitable for use in automotive systems.

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