TPS73201DBVRG4

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TPS73201DBVRG4 is a linear voltage regulator with low-dropout operation, offering low quiescent current, low noise, and fast transient response. It is a 200mA, low-dropout and low-quiescent-current, low-noise linear regulator, with an operating input voltage range of 1.4V to 13.2V. The device is available in the DSBGA (2mm2) package and is qualified for automotive-grade applications.

Application Field of TPS73201DBVRG4

TPS73201DBVRG4 is targeted for use in a variety of automotive, industrial and other applications, where low-dropout voltage and a low quiescent current are necessary. Itregulates, for example, supply voltage for automotive ECUs, and provides power for industrial applications such as Ethernet, handheld, controller and communications systems. The 1.2V reference voltage accuracy combined with the ultra-low 1.7µA quiescent current make the device the perfect choice for point-of-load and precision systems. The output voltage range is adjustable from 1.3V to 5.5V and since the device is stable with very low-ESR ceramic capacitors and therefore cost-effective, it simplifies many cost-sensitive designs.

Working Principle of TPS73201DBVRG4

TPS73201DBVRG4 is based on a CMOS error amplifier and a power pass element. The output voltage level is set by a resistor divider applied to the reference voltage. A TTL-compatible enable input allows the device to be disabled to reduce the current consumption to less than 1µA. Furthermore, the device can be placed into a low- current sleep mode, where it will still maintain the proper regulation.

The output voltage of TPS73201DBVRG4 is monitored internally and compared to the reference voltage. The current that is drawn by this error amplifier is proportional to the difference between the programmed output voltage and the voltage that is developing across the power pass device.

The error amplifier, along with the feedback network, forms a linear loop, which is capable of regulating the output voltage of the device. When the output voltage is lower than normal, the output pin of the error amplifier is pulled lower, causing an increase in the gate of the pass device, thus resulting in an increase in the output voltage.

The current-limit protection is based on a voltage-monitoring circuit. Slew-rate limiting is implemented to suppress transients. Thermal-limiting protection is implemented to protect the device from overheating.

Conclusion

TPS73201DBVRG4 is a 200mA, low-dropout and low-quiescent-current, low-noise linear voltage regulator. It is targeted for use in a variety of automotive, industrial and other applications, where low-dropout voltage and a low quiescent current are necessary. The output voltage range is adjustable from 1.3V to 5.5V, and it can be used with very low-ESR ceramic capacitors. It offers low quiescent current, low noise, and fast transient response and implements slew-rate limiting and thermal-limiting protection to safeguard the IC. The working principle of the device is based on a CMOS error amplifier and a power pass element, and it is capable of regulating the output voltage properly via a linear loop.

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