XC6601B121MR-G

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The XC6601B121MR-G Integrated Circuit Voltage Regulator is a mobile voltage regulator designed to provide a wide range of adjustable 3.2V - 5.5V output voltage in a small 5mm x 5mm QFN package. This linear voltage regulator features low quiescent current and true output voltage accuracy of ±3.3%. Package also features enable pin, power-good indicator, feedback detect pin and over-voltage protection (OVP) pin.

XC6601B121MR-G can be used to provide high performance power supply solutions for smartphones, tablets and notebook PCs. The adjustable 3.2V output voltage is suitable for the power requirement of multiple application circuits. Moreover, the chip can save the regular switching voltage regulators for space-constrained and mobile designs. The integrated over-voltage protection (OVP) and internal thermal protection provide high reliability.

Working Principle

The XC6601B121MR-G integrated circuit voltage regulator is a low drop-out (LDO) linear regulator which features a voltage reference, an error amplifier, an output drive circuit and a thermal warning circuit. As shown in the figure, the output voltage is regulated by adjusting the output current which is controlled by the error amplifier. The error amplifier compares the output voltage with the internal voltage reference which is determined by the trigger voltage of the voltage reference. If the output voltage is higher than the reference voltage (Vref), the output current will decrease, thus reduces the output voltage. On the other hand, if the output voltage is lower than the reference voltage, the output current will increase such that the output voltage increases.

The integrated OVP circuit can sense the over-voltage event then shuts off the output voltage once it is detected. In addition, the chip also features a power-good indicator. The indicator is active and the output voltage drops below the accuracy range if the output voltage is not good. The feedback detect pin can also recognize any round-trip transmission to detect the output voltage.

Application Fields

XC6601B121MR-G Linear Voltage Regulator can be used in applications such as:

• Smartphones
• Tablet PCs
• Notebook PCs
• Netbooks
• Game Consoles
• Portable Media Players

XC6601B121MR-G can also be used in other portable power solutions and embedded devices. The small 5mmx5mm QFN package enables the chip to fit into small devices, while offering full-fledge power management solutions.

Conclusion

XC6601B121MR-G integrated circuit voltage regulator is an ideal solution for low quiescent current, high accuracy and small form factor voltage regulation. The chip is suitable for a variety of mobile applications, such as smartphones, tablets and notebooks, as well as game consoles and portable media players. An integrated over voltage protection circuit and a power-good indicator offer additional safety and performance, making the XC6601B121MR-G an excellent choice for a wide range of applications.

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