MAXIM MAX1940 Manual
MAX1940 is a triple current-limited switch with auto-reset that supplies a guaranteed 500mA load per channel in accordance with USB specifications. The MAX1940 operates from a 4V to 5.5V input supply and consumes only 60µA of quiescent current when operating and only 3µA in standby. Selectable active-high/active-low con- trol logic and independent shutdown controls for each channel provide additional flexibility. An autoreset fea- ture latches the switch off in the event of a short circuit, saving system power. The switch reactivates upon removal of the shorted condition. The MAX1940 provides several safety features to pro- tect the USB port. Built-in thermal-overload protection turns off the switch when the die temperature exceeds +160°C. Accurate internal current-limiting circuitry pro- tects the input supply against both overload and short- circuit conditions. Independent open-drain fault signals (FAULTA, FAULTB, and FAULTC) notify the micro- processor when a thermal-overload, current-limit, undervoltage lockout (UVLO), or short-circuit fault occurs. A 20ms fault-blanking feature enables the cir- cuit to ignore momentary faults, such as those caused when hot-swapping a capacitive load, preventing false alarms to the host system. The fault-blanking feature also prevents fault signals from being issued when the device powers up the load. The MAX1940 is available in a space-saving 16-pin QSOP package and operates over the extended (-40°C to +85°C) temperature r
Brand: MAXIM
File format: PDF
Size: 250 KB
MD5 Checksum: B0DFE681C66C3B1B36A6DE1CB98F084C
Publication date: 08 May, 2012
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PDF Link: MAXIM MAX1940 Manual PDF