TPS7301QDRG4

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TPS7301QDRG4 Application Field and Working Principle

The TPS7301QDRG4 is a low-dropout linear voltage regulator that is part of the Texas Instruments (TI) SMBus-Compliant Voltage Monitor and Regulator family. This family of devices provides small, cost-effective voltage regulation capabilities in all types of systems, including both portable and stationary applications. It is suitable for use in a wide range of power management applications, including but not limited to automotive, industrial, telecom, networking, and many commercial and consumer products.

The TPS7301QDRG4 is a low-dropout voltage regulator that regulates an input voltage of –0.2 V to 4.6 V to a stable output voltage of up to 4.6 V with an accuracy of ±2 % (±1 % for the FT variant). The device features a low quiescent current of only 10 µA and a maximum dropout voltage of 0.7 V for step-down voltages ranging from 0.8 V to 4.6 V. For some specific conditions, the device can have a maximum output current of up to 2 A.

Features

• Low dropout (LDO) regulator
• Input voltage range from – 0.2 V to 4.6 V
• Ability to regulate up to 4.6 V
• Accuracy of ±2 %
• Current limit of 2A (under certain conditions)
• Maximum dropout voltage of 0.7 V
• Quiescent current of only 10 µA
• Improved power supply rejection ratio
• User-adjustable output voltage

Working Principle

The TPS7301QDRG4 is a low-dropout linear voltage regulator that provides an uncompromised clean regulated voltage with excellent transient performance and tight load and line regulation. The internal circuitry of the TPS7301QDRG4 includes a series pass transistor, an internal reference, a temperature-compensated cascode-pair with an adjustable current source, and an adjustable resistor network. It includes an input voltage sense comparator and an output voltage sense amplifier for accurate control of the output voltage.

When the input voltage drops, the pass transistor conducts and lowers the output voltage. When the pass transistor is on, the voltage drop across the transistor is low and the load regulation is excellent. The TPS7301QDRG4 also has an internal pull-up resistor that connects to the sensing pin, allowing it to detect the actual output voltage and maintain it at the desired level even under heavy transient load conditions.

The TPS7301QDRG4 provides all the features necessary for use in a wide range of power management applications. It comes in a 3-pin SOT-23 package and is rated for operation from –40 °C to +85 °C. It has an operating temperature range of–40 °C to +85 °C, and can withstand a load dump of up to 25 V and a load dump pulse of 1 ms.

Conclusion

The TPS7301QDRG4 is a low-dropout linear voltage regulator that is part of the TI’s SMBus-Compliant Voltage Monitor and Regulator family. It provides small, cost-effective voltage regulation capabilities in all types of systems, and is suitable for use in a wide range of power management applications. It also features a low quiescent current of only 10 µA and a maximum dropout voltage of 0.7 V for step-down voltages ranging from 0.8 V to 4.6 V. The TPS7301QDRG4 provides all the features necessary for use in a wide range of power management applications and comes in a 3-pin SOT-23 package.

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