The MAX1563ETC+ is a 4A programmable USB current limited switch with auto-reset and fault blanking in 12 pin TQFN package. This single current limited switch provides up to 4A current to power up to eight USB ports. It consumes only 40µA of quiescent current when operating and only 3µA in shutdown mode. The auto-reset feature latches switch off if output is shorted thereby saving system power. The switch is reactivated when the short is removed. A fault blanking feature enables circuit to ignore momentary faults such as those caused when hot swapping capacitive load by preventing false alarms to the host system. The built-in thermal overload protection turns off switch when die temperature exceeds 160°C. Accurate internal current limiting circuitry protects input supply against both overload and short circuit conditions. An open drain fault signal (active-low FAULT) notifies microprocessor when thermal overload, current limit, undervoltage lockout (UVLO) or short circuit fault occurs.
● Supply voltage range from 4V to 5.5V
● Operating temperature range from -40°C to 85°C
● Selectable active-high or active-low logic controlled enable
● Programmable current limit (1A to 3A) with resistor
● Switch on-resistance of 26Mohm at TA = 0°C to 85°C
● 20ms fault blanking circuitry, fault indicator output
● Active-high/low control logic
● Turn-on delay is 1.2ms and turn-off delay is 0.1ms at TA = 0°C to +85°C
● Thermal overload protection
