85mΩ High Function Power Switch with Current Limit Adjustable Pin

The XC8109 series is a P-channel MOSFET power switch IC with a low ON resistance. A current limit, reverse current protection (prevents reverse current from VOUT to VIN), soft start, thermal shutdown, and an under voltage lockout (UVLO) are incorporated as protective functions. A flag function monitors the power switch status.

The flag output has N-channel open drain structure, and outputs Low level signal while over-current or overheating is detected, or while the reverse current protection is operated.

A variable current limiting function is integrated, allowing the current limit value to be set, using an external resistor.

The voltage level which is fed to CE pin determines the status of XC8109. The logic level of CE pin is selectable between either one of active high or active low.


Input Voltage Range 2.5V~5.5V
MaximumOutput Current 0.9A
On Resistance 85mΩ@VIN=5.0V(TYP.)
Quiescent Current 40μA@VIN=5.0V
Stand-by Current 0.1μA(TYP.)
Flag Delay Time 7.5ms(TYP.)*Current LimitDetect
4ms(TYP.)*Reverse voltage detection
Protection Circuits Current Limit 75mA~1.3A(TYP.)
Reverse Current Prevention
Thermal Shutdown
Under Voltage Lockout(UVLO)
Functions Flag Output
CE Pin Input Logic Selectable
Current Limit Response Time 2μs(TYP.)
Operating Ambient Temperature -40℃~+105℃
Environmentally Friendly EU RoHS compliant, Pb free

Typical Application Circuit

Technical Document


Package Number of Pins Pcs/Reel Package Size(mm)
USP-6C 6 3,000 1.8 x 2.0 x 0.6

XC8109 Series Part Numbers

Part number Sample CE Logic Protection Circuits Type Packages EDA Online Store
XC8109AC10ER-G ActiveHigh Without Latch Protection USP-6C
XC8109AD10ER-G ActiveHigh With Latch Protection USP-6C
XC8109BC10ER-G ActiveLow Without Latch Protection USP-6C
XC8109BD10ER-G ActiveLow With Latch Protection USP-6C

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