EZ1587CT-2.5T

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EZ1587CT-2.5T Application Field and Working Principle

The EZ1587CT-2.5T belongs to the family of step-down, low-dropout (LDO) linear voltage regulators. Developed and manufactured by Richtek, this series of voltage regulator ICs provide excellent regulation performance for battery-powered devices. It is highly suitable for applications requiring low-dropout and low standby power, such as mobile phones, portable consumer electronics, tablet PCs, etc.

The feature set of the EZ1587CT-2.5T includes an excellent line and load regulation, as well as low-noise operation. It is available in both surface mount (QFN) and column type package (QCC), and support output voltage range of 1.8V to 6V. It also provides a current limit and short circuit protection, as well as thermal shutdown. Thanks to the low-dropout voltage of 200mV@250mA, it can easily meet rigorous conditions demanded by multiple electronic devices.

Operation Principle

The operation principle of the EZ1587CT-2.5T can be summarized as a three step process. First, a voltage reference or an external reference voltage is connected to the external pin of the voltage regulator IC. then, a voltage sensing resistor is connected in series with a rounded capacitor to form a band gap circuit. This circuit produces a reference voltage that is proportional to the reference voltage. Finally, an error amplifier compares the output voltage to the reference voltage and regulates the output voltage accordingly.

The output voltage of the EZ1587CT-2.5T can be adjusted by connecting a feedback resistor divider between the output and the error amplifier. When the output voltage deviates from the desired value, the error amplifier sends a control signal to the internal PWM controller, which then generates the necessary amount of current (load current) to drive the output voltage back to its desired voltage level.

Features and Benefits

The EZ1587CT-2.5T provides a wide range of features that make it a highly suitable for battery-powered applications. Some of the notable features are:-

• Low dropout voltage – 200mV@250mA
• High switching frequency up to 2.5MHz
• Integrated short circuit, current limit, and thermal shutdown protection
• Available in both QFN and QCC packages

These features make the EZ1587CT-2.5T an ideal solution for battery-powered devices. Its low dropout voltage ensures a highly efficient operation, leading to improved battery life and reduced power consumption. Additionally, its high switching frequency further helps in achieving a very low output ripple voltage. The integrated protection circuits provide an additional layer of safety for the device. Moreover, the availability of both QFN and QCC packages makes it applicable to a wide range of applications.

Conclusion

The EZ1587CT-2.5T is a versatile LDO linear voltage regulator developed by Richtek. It is a highly suitable voltage regulator for applications requiring low-dropout and low standby power, such as mobile phones, tablet PCs, etc. Its distinguishable features include high switching frequency, low dropout voltage, output voltage range of 1.8V to 6V, and integrated short circuit, current limit, and thermal shutdown protection. Additionally, the availability of both QFN and QCC packages make it applicable to a wide range of applications. All these features make the EZ1587CT-2.5T an excellent solution for modern, battery-powered electronic applications.

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