TPS61251DSGR Integrated Circuits (ICs)

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The TPS61251DSGR is a high-efficiency DC-DC / Low-Dropout (LDO) converter device triple output regulator with input voltage range 2.7V to 5.5V and output voltage 0.9V to 5.25V. It is designed to provide power management to systems powered by battery or DC supplies.

This device offers a wide range of applications in consumer and industrial grade systems. It can be easily used in many applications such as TV / STB, Computing, HDD and portable products. It can also be used in high power applications in cellular base-stations and in high power distributed power systems.

Working Principle

The TPS61251DSGR integrated regulator works by using one input voltage which is then conditioned by an internal voltage regulator to supply a user selectable output voltage. The device is composed of two channels of regulators — one for the main output and one for the low-dropout regulators. The main output is enabled with the EN pin. The output voltage is monitored through the FB pin and can be adjusted through the ADJ pin.

The main channel consists of a pass transistor, current-sense amplifier, and error amplifier. The pass transistor is responsible for adjusting the output voltage by controlling the voltage across a power switch. The current-sense amplifier senses the current through the pass transistor and produces the output voltage by adjusting the bias of the error amplifier.

The low-dropout regulator channel consists of a pass transistor, current-sense amplifier, and error amplifier, as well as a low-dropout voltage reference. Using the low-dropout voltage reference, the error amplifier monitors the drain current of the pass transistor and adjusts the bias of the error amplifier to maintain a constant voltage.

Protection Features

The TPS61251DSGR integrated regulator has several protection features in order to maintain the system functioning without any danger to the components. The protection features are the thermal protection, overcurrent protection, and the undervoltage lockout (UVLO).

The thermal protection works by shutting down the output voltage when the current in the pass transistor exceeds the thermal protection threshold. The overcurrent protection monitors the current in the pass transistor and shuts it down when the current reaches the set limit. The undervoltage lockout works by shutting down the output voltage when the input voltage reaches the set limit.

Conclusion

The TPS61251DSGR integrated regulator is a DC-DC / Low-Dropout (LDO) converter device triple output regulator with input voltage range 2.7V to 5.5V and output voltage 0.9V to 5.25V. It is designed to provide power management to systems powered by battery or DC supplies. This device offers a wide range of applications in consumer and industrial grade systems and can be easily used in many applications such as TV / STB, computing, HDD, and portable products.

This device is equipped with several protection features for its reliable operation, including thermal protection, overcurrent protection, and undervoltage lockout (UVLO). With this device, it is possible to manage the power of systems powered by battery or DC supplies more efficiently and with more reliability.

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