Rainbow Electronics MAX4995 - Manual (Page 9)

MAX4995A/AF/AL/MAX4995B/MAX4995C
50mA to 600mA Programmable
Current-Limit Switches
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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).
t RETRY t BLANK t BLANK t BLANK t BLANK t RETRY
FLAG
OUT
CURRENT LIMIT
LOAD CURRENT THE DEVICE GOES TO
THERMAL-SHUTDOWN MODE
Figure 2. Autoretry Fault Diagram
t BLANK t BLANK
FLAG
OUT
CURRENT LIMIT
LOAD CURRENT
THE DEVICE GOES TO
THERMAL-SHUTDOWN MODE
Figure 3. Latchoff Fault Diagram