AIC1521

AIC1521 Single High-Side Power Switch With Control Function n FEATURES 120mΩ (5V Input) High-Side MOSFET Switch. l 500mA Continuous Load Current. l 80µA Typical On-State Supply Current. l 1µA Typical Off-State Supply Current. l Current-Limit / Short Circuit Protection. l Thermal Limiting Protection under Overcurrent Condition. l Undervoltage Lockout Ensures that Switch is off at Start Up. l Output can be Forced Higher than Input (Off-State). l Slow Turn ON and Fast Turn OFF. l Active-High or Active-Low Enable. n DESCRIPTION The AIC1521 is an integrated high-side power switch for self-powered and bus-powered Universal Serial Bus (USB) applications. The high-side switch is a MOSFET with 120mΩ RDS(ON), which meets USB voltage drop requirements for maximum transmission wire length. The switch ON/OFF is controlled by CTL pin. Output current is typically limited to 1.0A, well below the 5A safety requirement, and thermal shutdown function shuts the switch off to prevent damage under overcurrent conditions. n APPLICATIONS l l l l l Motherboard USB Management. USB Power Management. Hot Plug-In Power Supplies. Battery-Charger Circuit. Power Distribution Switch. Guaranteed minimum output rise time limits inrush current during hot plug-in, minimizing EMI and preventing the voltage at upstream port from dropping excessively. n TYPICAL APPLICATION CIRCUIT Ferrite Bead AI C1521-0 VCC 5.0V IN OUT + VBUS 33µ F 0.1µF CTL GND + *33µ F 0 .01µ F D+ DGND *33µF, 16V Tantalum, or...