ZHCSK00D September 2010 – July 2019 TLV702
PRODUCTION DATA.
If the input voltage is lower than the nominal output voltage plus the specified dropout voltage, but all other conditions are met for normal operation, the device operates in dropout mode. In this condition, the output voltage is the same as the input voltage minus the dropout voltage. The transient performance of the device is significantly degraded because the pass device is in a triode state and no longer regulates the output voltage of the LDO. Line or load transients in dropout may result in large output voltage deviations.
Table 1 lists the conditions that lead to the different modes of operation.
OPERATING MODE | PARAMETER | |
---|---|---|
VIN | IOUT | |
Normal mode | VIN > VOUT(nom) + VDO | IOUT < ICL |
Dropout mode | VIN < VOUT(nom) + VDO | IOUT < ICL |
Current limit | VIN > UVLO | IOUT > ICL |