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MAX4995B Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX4995B Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 12 page 50mA to 600mA Programmable Current-Limit Switches _______________________________________________________________________________________ 9 FLAG Indicator FLAG is an open-drain fault indicator output and requires an external pullup resistor to a DC supply. FLAG goes low when any of the following conditions occurs: • The device is in current-limit mode. • The OUT voltage is above the IN voltage by more than 110mV (typ). • The die temperature exceeds the thermal-shutdown temperature limit of +150°C. • SETI is connected to ground. Thermal Shutdown Thermal-shutdown circuitry protects the devices from overheating. The switch turns off and FLAG goes low immediately when the junction temperature exceeds +150°C (typ). The switch turns on again after the device temperature drops by approximately 15°C (typ). tRETRY tBLANK tBLANK tBLANK tBLANK tRETRY FLAG OUT CURRENT LIMIT LOAD CURRENT THE DEVICE GOES TO THERMAL-SHUTDOWN MODE Figure 2. Autoretry Fault Diagram tBLANK tBLANK FLAG OUT CURRENT LIMIT LOAD CURRENT THE DEVICE GOES TO THERMAL-SHUTDOWN MODE Figure 3. Latchoff Fault Diagram |
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