MCP1824T-5002E/OT

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MCP1824T-5002E/OT Application Field and Working Principle

The MCP1824T-5002E/OT is a voltage regulator integrated by Microchip Technology Inc. It is categorized under PMIC - voltage regulators -linear. In terms of features, the MCP1824T-5002E/OT has a low dropout voltage of 500mV, a low output voltage noise of 15mV and a high PSRR of 70dB at 600kHz. It also provides a wide input voltage range and can operate in a range between 2.2V and 18V.

Typical Application Field

MCP1824T-5002E/OT is a simple and efficient power supply solution for a wide range of applications, from common consumer electronics to more complex industrial equipment and automotive systems. Its vast input voltage range allows it to be applicable in multiple design scenarios with different types of input sources, such as Li-ion batteries, AC-DC power supplies, or DC-DC converters.

Its high PSRR (Power Supply Ripple Rejection) allows it to perform extremely well next to sources of large RF (Radio Frequency) noise, such as a built-in RF transmitter, which are more and more common in the modern electronics landscape.

In terms of its outputs, the MCP1824T-5002E/OT can provide up to 500mA of peak current, making it suitable for low power applications such as internal logic powering, LED driving, and analog-digital converters.

Working Principle

The MCP1824T-5002E/OT works using a three-terminal voltage regulator IC (Integrated Circuit) and it combines two basic building blocks which are the error amplifier and the series pass element. The error amplifier provides the correct reference voltage to the series pass element and the series pass element controls the magnitude of the output current.

The output voltage of the MCP1824T-5002E/OT is determined by an external resistor divider, R1 and R2, between ground and the output voltage as illustrated in Figure 1. For a given voltage at the sense terminal, the output voltage is regulated by the series pass element, which senses the voltage at the OUT and FB pins.

The input voltage is applied to the IN pin, and it is compared to the reference voltage (at FB pin). The difference between these two signals is amplified by the error amplifier inside the MCP1824T-5002E/OT, then the amplified signal is applied to the series pass element. The series pass element will then either increase or decrease the current flowing through it and therefore controlling the output voltage.

The MCP1824T-5002E/OT also features an enable pin which can be used to turn off the regulator. When the enable pin is driven low, the output is turned off and the device will draw no current.

Conclusion

The MCP1824T-5002E/OT is a low voltage regulator with a wide input voltage range which is compatible with different types of input sources. It has a low dropout voltage, low noise and can provide up to 500mA of peak current. It is suitable for a wide range of applications from consumer electronics to industrial equipment and automotive systems.

Its working principle is based on the error amplifier combined with the series pass element which allows it to regulate its output voltage according to the input voltage and external resistor divider.

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