AP2128K-3.0TRG1

AP2128K-3.0TRG1 application field and working principle

AP2128K-3.0TRG1 is a port type linear voltage regulator from Diodes Inc., which is low power, low noise, and low dropout. It is capable of providing fixed 3.0V output voltage with only 0.4V dropout voltage and extremely low quiescent current for better battery lifetime. AP2128K-3.0TRG1 offers enable/shutdown, thermal warning output and high ESD protection, which makes it suitable for portable electronic devices.

Application field

AP2128K-3.0TRG1 is a highly reliable regulator for portable electronic devices, especially those battery operated. It is suitable for the applications such as Smartphones, Tablets and other portable gadgets. With its enable/shutdown, thermal warning output, low dropout voltage and low quiescent current, the AP2128K-3.0TRG1 also reduces thermal disturbance, enabling accurate control of standby power and better battery lifetime.

Working principle

AP2128K-3.0TRG1 is a port type linear voltage regulator with an integrated MOSFET to regulate voltage without increasing the output voltage. It works in three stages – pre-regulator, error amplifier, and power MOSFET. Initially, the input voltage is pre-regulated using a low drop regulator. Then, the error amplifier compares the output voltage with the reference voltage and passes the signal to the MOSFET in order to maintain the output voltage. Finally, the MOSFET adjusts the input voltage in order to maintain the output voltage at a stable level. This linear voltage regulator provides a low dropout voltage, which means that the output voltage is near the same as the input voltage.

Conclusion

AP2128K-3.0TRG1 is a highly efficient port-type linear voltage regulator, which is ideal for applications requiring a low dropout voltage, low output noise and low quiescent current. It is especially well-suited for portable electronic applications such as smartphones and tablets. It uses a three-stage approach of pre-regulation, error amplifier and power MOSFET regulation to maintain low dropout voltage and stable output voltage.