CAT6217-250TDGT3

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PMIC, or power management integrated circuits, make it easier to design, power, and manage the power supply of a device. PMICs are particularly useful for devices with high power demands, such as embedded systems and automotive electronics. In this article, we will take a look at the CAT6217-250TDGT3, a linear voltage regulator from Catalyst Semiconductor, and discuss its application field and working principle.

CAT6217-250TDGT3 Application Field

The CAT6217-250TDGT3 is a linear voltage regulator designed for use in DC/DC power conversion applications. It is designed to provide a regulated output voltage of +5V at up to 250mA of load current. The CAT6217-250TDGT3 is optimized to provide low dropout voltage, low quiescent current, and high efficiency in order to reduce power consumption and extend battery life. The device is also designed to provide superior thermal performance with its small package size and integrated thermal regeneration circuit.

The CAT6217-250TDGT3 is able to accurately regulate output voltages from 4.7V to 5.5V with an output accuracy of ±0.6V and a line regulation of 10mV. The device’s output is protected from excessive load current, overvoltage, and overtemperature conditions. The device also has a user-programmable enable/shutdown pin, allowing the user to turn off the regulator without having to remove power to the circuit. The CAT6217-250TDGT3 is designed to operate over a wide temperature range of -40°C to +125°C.

CAT6217-250TDGT3 Working Principle

The CAT6217-250TDGT3 operates in a linear manner. In this type of regulator, an external pass transistor is used to regulate the output voltage. The pass transistor is connected in series between the input and output of the device, and the output voltage is regulated by controlling the current through the pass transistor. The external pass transistor is in turn controlled by the internal linear control block, which uses a linear control technique involving comparing the output of an error amplifier to a reference voltage.

When the output voltage drops below the set point due to an increase in load current, the error amplifier senses the change and its output voltage increases. This increase in the error amplifier output is then fed to the gate of the pass transistor, increasing its conductance. This increases the current flow through the pass transistor, and in turn, increases the voltage at the device’s output, thus regulating the output voltage. Conversely, when the output voltage is above the set point due to a decrease in load current, the error amplifier senses the change and its output voltage decreases. This decrease in the error amplifier output is then fed to the gate of the pass transistor, decreasing its conductance. This decreases the current flow through the pass transistor, and in turn, decreases the voltage at the device’s output, thus regulating the output voltage.

Conclusion

The CAT6217-250TDGT3 is a linear voltage regulator designed for use in DC/DC power conversion applications. It is designed to provide a regulated output voltage of +5V at up to 250mA of load current, and its optimized features provide improved power savings and better thermal performance. Its linear regulation technique involves an external pass transistor which is controlled by an internal linear control block, utilizing an error amplifier which compares a reference voltage to the output of the regulator. This article has discussed the application field and working principles of the CAT6217-250TDGT3.

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