XC8101 Series

Low Quiescent Current Load Switch

The XC8101 series is a low On resistance line switch IC with ON/OFF control which integrates P-channel MOSFET.

The XC8101 is suited for power distribution switch. With connecting to the output pin of step-down DC/DC converters, the CE pin controls ON/OF for each distribution switch to deliver power per requirements and maximize total power efficiency. As result, the XC8101 helps extend battery life and product operation time. The XC8101 is available in an ultra small package USP-4 and does not require any external capacitors so that it can provide small power unit design and board space saving. When low signal is input to the CE pin, the XC8101 enters stand-by mode. Even where a load capacitor is connected to the output pin during in the stand-by mode, the internal switch between the VOUT and VSS of the XC8101 enables the electric charge in the load capacitor to be discharged. Because of this discharge function, the VOUT pin voltage falls quickly to VSS level.

The XC8101 contains an over current protection with foldback current circuitry which operates as over current protection and short circuit protection for the output pin.

Typical Application Circuit


On Resistance 0.75Ω@VIN=2.9V(TYP.)1.15Ω@VIN=1.8V(TYP.)
Output Current 200mA(300mAlimitTYP.)
Input Voltage Range 1.8V~6.0V
Quiescent Current 3.0μA@VIN=1.8V
Stand-by Current 0.1μA
Protection Circuits Current Limit 300mA(TYP.)
Short Circuit Protection
Short current 30mA(TYP.)
ON/OFF Function High Active Enable
Discharge Function High-Speed Discharge Function
Operating Ambient Temperature -40℃~+85℃



Quality Reports


QuestionHow does the CL discharge function work?

The function rapidly releases the charge remained in the CL capacitor to make the VOUT pin voltage zero. The VOUT pin voltage does not reach zero immediately after being turned off by the CE function due to the charge remained in the connected CL capacitor. While the charge in the CL capacitor is gradually reaching zero, the LSI continues operating and does not work with the CE pin signal, which may cause a malfunction. This is why the discharge is required when turning off the CE pin. A larger capacitance of the capacitor needs longer time to be discharged.

QuestionWhat does CL mean?

Load capacitor. Other companies often refer to it as COUT.