TPS79912DDCTG4

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TPS799xxDCTG4 Application Field and Working Principle

The TPS799xxDCTG4 family of low-noise, high-precision linear voltage regulators offer a wide range of current and voltage capabilities to meet the needs of backlight systems, embedded device power requirements, industrial controllers, and other power rail applications. The family includes an adjustable output and three fixed-voltage options - 3.3V, 5V, and 10V.

Functionality of TPS799xxDCTG4 Regulators

The TPS799xxDCTG4 regulators feature excellent line and load regulation, low noise levels and excellent thermal stability. The adjustable output variant includes a power-on reset (POR) and power-good (PG) function, which can be used to detect and protect the system from unexpected events. With the internal voltage reference, an output voltage trim is available through one or two external resistors.

The TPS799xxDCTG4 also provides an independent enable pin (EN) control feature, allowing the user to turn the regulator on and off. The device can also be configured with external resistors to provide user-selectable limits (on/off) to map the system requirements.

Applications

The TPS799xxDCTG4 offers a wide range of current and voltage capabilities to meet the needs of various applications. It is ideal for backlight systems and embedded device power applications due to its low noise levels and excellent thermal stability. Additionally, it can be used in industrial controllers for voltage rails up to 10V as well as for other power rail applications.

Working Principle

The TPS799xxDCTG4 is a low-noise, high-precision linear voltage regulator which uses a band gap reference for the controlled output voltage. Two comparators are used, one to compare the external voltage applied to the output and the other to compare the feedback voltage to the reference voltage. The internal control stage minimizes noise and ripple and corrects any voltage errors. When the output of the comparator changes, the output voltage of the regulator is adjusted to maintain its predetermined accuracy.

The EN pin allows the user to turn the regulator on or off. When EN is low the regulator is in shutdown mode, the output voltage is 0V, and there is no power draw. When EN is high, the regulator is in normal operation, providing the regulated output voltage. The POR pin indicates the state of the regulator; it is low when the output voltage is below the power-on reset threshold and high when the output voltage is above the threshold. The PG pin indicates when the output voltage is within the specified range.

Conclusion

The TPS799xxDCTG4 family of low-noise, high-precision linear voltage regulators offer excellent line and load regulation, low noise levels and excellent thermal stability, as well as an adjustable output and three fixed output options to meet the needs of backlight systems, embedded device power requirements, industrial controllers, and other power rail applications. The internal voltage reference, an output voltage trim feature, an independent enable pin, and power-on reset and power-good functions make the TPS799xxDCTG4 a versatile and powerful linear voltage regulator.

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