RT9161-15GX

RT9161-15GX Application Field and Working Principle

Linear voltage regulators regulate output voltage by providing a preset amount of voltage regardless of input voltage. RT9161-15GX is a synchronous buck regulator with a flexible PMIC that suits for various voltage regulation applications for mobile and consumer electronics.

Application and Advantages of RT9161-15GX

As a linear voltage regulator, RT9161-15GX supports adjustable output voltage range from 0.6V to 5.5V, suitable for various chip and component requirements on power supply. It offers highly efficient and reliable power designs in power banks, mobile phones, notebook computers and other portable devices.

RT9161-15GX also utilizes a power saving as low quiescent current (QCS) operation of 0.3 μA and a highly efficient step-down Mode with tiny minimal component size. The average efficiency of up to 95.4% provides superior thermal dissipation, allowing for a more compact module size and better power saving performance.

It employs a one-time programming (OTP) during the manufacturing period which achieves the high accuracy output voltage after the power-on sequence, and also supports a soft-start time for optimal thermal performance. The low dropout voltage of 50mV at no load operation maintains high efficiency across the load range.

Power Path Management of RT9161-15GX

The PMIC also has a wide array of integrated functions such as overvoltage protection, overcurrent protection, thermal shutdown, soft-start and fast transient response. In addition, RT9161-15GX allows adjustable input voltage up to 10V as well as supporting equal power sharing between multiple LDOs or DC-DC converters.

Working Principle of RT9161-15GX

RT9161-15GX is based on the synchronous buck topology and utilizes the combined MOSFET switches to reduce the power switch losses. The adjust output voltage can be achieved via an internal voltage reference and the internal resistor divider.

The voltage feedback comes from the internal voltage divider network, then error amplifiers modulate the differential signal between the reference voltage and feedback voltage. The differential signal forms the control inputs for the current sense comparator and the internal MOSFET driver.

For current mode operation, the current sense comparator receives the signal from the integrated control loop and then produces the signal to control the current of the MOSFET switches. RT9161-15GX allows users to set the current limit of the output to ensure safe and reliable operation.

Conclusion

In conclusion, RT9161-15GX is an excellent linear voltage regulator for mobile and consumer electronics. The PMIC features a wide adjustable output voltage range and low quiescent current operation with higher efficiency, which helps to save power for the device and reduce the thermal dissipation. In addition, it integrates process management and advanced protection features which ensure the safe and reliable operation of the device.