The MAX1946ETA+T is a single USB switch with autoreset and fault blanking in 8 pin TDFN package. This single current limited switch with autoreset supplies provides 500mA load in accordance with USB specifications. The MAX1946 operates from 2.7V to 5.5V input supply and consumes 40μA of quiescent current when operating and only 3μA in shutdown mode. An autoreset feature latches switch off in the event of short circuit which saves system power. The switch reactivates upon removal of shorted condition. 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 (μP) when thermal overload, current-limit, undervoltage lockout (UVLO) or short circuit fault occurs. The fault blanking feature prevents fault signals from being issued when the device powers up the load.
Maximum switch on-resistance of 90mohm at VIN = 5, TA = +25°C
Operating temperature range from -40°C to 85°C
Autoreset feature saves system power
OUT autoreset threshold of 0.4V to 0.6V at TA = -40°C to +85°C
Built-in 2ms fault blanking function enables the circuit to ignore momentary faults
Selectable active-high/active-low control logic and shutdown control provide additional flexibility
Fully compliant to USB specifications
Fault indicator output
Continuous current limit from 0.6A to 1.3A at TA = -40°C to +85°C
(EN)
