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TPS73401DRVR Application Field and Working Principle

Texas Instruments\' TPS73401DRVR is a Linear Voltage Regulator (PMIC) designed to regulate the voltage either from an input voltage source or from an external reference voltage.

The TPS73401DRVR is a synchronous low dropout (LDO) regulator. It operates in fixed-output or adjustable-output modes that allow easy configuration of the output voltage. It offers excellent precision, stability and fast transient response over a wide variety of input voltage and load conditions.

The TPS73401DRVR is suitable for a wide variety of applications, including embedded designs in industrial, consumer, communications, and automotive markets. It is also well-suited for portable and wearable applications, charging and power supply applications, as well as demand response systems.

Features

• Wide operating junction temperature range of -40°C to +125°C
• Adjustable output voltage from 0.75 V to 5.5 V
• Input voltage from 3.2 V to 17 V
• Output current up to 1.2 A
• Low noise and fast transient response
• High load and line regulation
• Fixed and adjustable output voltage options
• Soft start and output discharge function
• Optional fast overvoltage protection

Working Principle

The TPS73401DRVR is a low dropout (LDO) regulator, which means that it will maintain a consistent output voltage with input voltages as much as several volts lower than the output voltage - often as high as 17 volts. The TPS73401DRVR operates as a synchronous device, which means that switching transistors are connected directly between the input and output. This method of regulation is much more efficient than a traditional LDO and provides the ability to supply higher loads with the same input voltage.

The TPS73401DRVR has an adjustable output voltage range of 0.75 V to 5.5 V. It is designed to provide an output voltage that is very stable and accurate over a wide variety of input and load conditions. The output voltage is controlled via an external resistor divider, allowing a wide range of output voltages to be set. The output current capability of the device is 1.2 A, with a maximum output voltage ripple of 40 mV.

The TPS73401DRVR features advanced design techniques to provide excellent load and line regulation, low output voltage noise, as well as fast output voltage and current transient response. It also has an internal soft start, which limits inrush current at startup and prevents overstress of input power sources. The device also features an output discharge function, which discharges the output capacitors in the event of an output voltage fault. The device is designed for very low on-resistance and thus has very low output noise.

The TPS73401DRVR also has an optional fast overvoltage protection (FVP) function. This function allows the output voltage to be monitored and excess voltages above a predetermined level are clamped. This feature helps protect downstream components in the event of an overvoltage condition.

Conclusion

The TPS73401DRVR is a versatile and high-performance synchronous low dropout regulator that is well-suited for a wide variety of applications. It provides a highly stable, precise and fast output voltage with support for a wide input voltage range and excellent load and line regulation performance. In addition, the device offers an optional FVP function to help protect downstream components. The TPS73401DRVR is an ideal solution for a wide range of industrial, consumer, communications, and automotive applications.

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