PQ09RA11

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Introduction

PQ09RA11 is a voltage regulator made by PQ Corporation, which belongs to PMIC - Voltage Regulators - Linear. It is a low dropout (LDO) voltage regulator in a small package. It has wide input voltage range, good load/line regulation, low quiescent current, fast transient response, and low output noise. This article will discuss the application fields and working principle of PQ09RA11.

Application Fields of PQ09RA11

PQ09RA11 is mainly used in the power supply design of mobile phones, tablets and laptops. It is suitable for the various power supply applications, such as battery supplies, switching power suppliers, and intelligent power management IC (IPM IC). Its small size and high performance make it an ideal choice for portable device power supply design.

Working Principle of PQ09RA11

PQ09RA11 is an integrated circuit with high-performance low dropout (LDO) voltage regulation. It consists of an internal high-efficiency N-channel power MOS, a voltage reference, an operational amplifier and other protection and control circuits. The main control loop of the circuit is formed by the operational amplifier. The voltage reference sets the reference voltage, which is compared with the input voltage by the operational amplifier. If the comparison result shows that the output voltage is lower than the expected one, the operational amplifier will output positive electrical signals to reduce the resistance value of the internal MOS, and the output current will increase accordingly. By using this control loop and the internal high-efficiency N-channel power MOS, the output voltage can be regulated precisely and stably.

Conclusion

PQ09RA11 is a voltage regulator belonging to PMIC - Voltage Regulators - Linear and manufactured by PQ Corporation. It mainly used in the power supply design of mobile phones, tablets and laptops. Its main working principle is that the internal high-efficiency N-channel power MOS and the operational amplifier are used to form a control loop which adjust the resistance value of the MOS and regulate the output voltage precisely and stably.

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