Low dropout linear regulator (LDO) is widely used in various electronic products, and the market demand is huge. More perfect resources are provided, and the ultra-low power consumption LDO RS3221 is introduced. RS3221 is designed with CMOS process, and its main features are as follows:

● The self consumption current is as low as 1 µ A;

● Provide output current up to 200mA;

● Low Dropout voltage, 160mV@200mA &3.3V；

● Provide wider input voltage range, 1.7V~7.5V;

● Provide 0.8V/1.2V VFB voltage, covering common feedback reference voltage in the industry.

USB interface or other power interface will generate surge voltage during hot plug (see Figure 2), which is a troublesome problem that must be solved during circuit design. The maximum withstand voltage of ordinary low-voltage CMOS process is only 6V, and it is not enough to withstand the impact of surge voltage during hot plug without special surge prevention design.

USB interface hot plug surge waveform:

Note: The yellow line is surge voltage, and the red line is surge current.

As a rising star in the semiconductor industry, Runshi Technology has a deep understanding of the detailed requirements of the application. RS3221 is specially designed with 8V CMOS technology. Its wide input voltage range can not only perfectly cope with the surge voltage when USB VBUS interface or other power interfaces are hot plugged, but also cover the minimum discharge voltage requirements of multiple dry batteries, single lithium manganese batteries and other button batteries, thus providing a better solution choice. RS3221 provides a variety of standard packages, including SOT23-3, SOT23-5, SC70-5, DFN1x1, SOT89-3, etc. It also provides various common output voltages, and also accepts customized special output voltages and packages. Engineers from all walks of life are welcome to evaluate and select models.