NCP383 Adjustable Current-Limiting Power-Distribution Switches The NCP383 is a single input dual outputs powerdistribution switch designed for applications where heavy capacitive loads and NCP383 USB Data D+ USB USB INPUT D Port 5 V IN OUT1 VBUS 1 F IN GND R fault 120 F 100 k NCP383 USB FLAG1 /FLAG1 Data /EN1 EN1 ILIM D+ USB Port D /FLAG2 FLAG2 OUT2 VBUS EN2 120 F GND /EN2 GND Figure 1. Typical Application Circuit: NCP383xMUAJxx Adjustable Current limit on Channel 1 and Channel 2 PIN FUNCTION DESCRIPTION Pin Name Number Type Description GND 1 P Ground connection. IN 2, 3 P Power switch input voltage connect a 1 F or greater ceramic capacitor from IN to GND as close as possible to the IC. Both IN pins must be hardwired together on the PCB. /EN1 4 I Enable 1 input, logic low turns on power switch 1 If channel 1 is not used, do not leave this pin unconnected. Pull it to V IN /EN2 5 I Enable 2 input, logic low turns on power switch 2. If channel 2 is not used, do not leave this pin unconnected. Pull it to V IN /FLAG2 6 O Activelow opendrain output 2, asserted during overcurrent, overtemperature, or reverse voltage conditions. Connect a 10k or greater resistor pullup, otherwise leave unconnec- ted. ILIM 7 O External resistor used to set currentlimit threshold recommended 20k < R < 120 k . ILIM OUT2 8 O Powerswitch output2 connect a 1 F ceramic capacitor from OUT2 to GND as close as possible to the IC is recommended. A 120 F or greater ceramic capacitor from OUT2 to GND must be connected if the USB requirement is not met. OUT1 9 O Powerswitch output1 connect a 1 F ceramic capacitor from OUT1 to GND as close as possible to the IC is recommended. A 120 F or greater ceramic capacitor from OUT1 to GND must be connected if the USB requirement is not met. /FLAG1 O Activelow opendrain output 1, asserted during overcurrent, overtemperature, or reverse voltage conditions. Connect a 10 k or greater resistor pullup, otherwise leave unconnec- 10 ted. PAD 11 Therm Exposed Thermal Pad: Must be soldered to PCB Ground plane