JAJSQB6 April 2024 TPS7B92
PRODUCTION DATA
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The device operates in dropout mode when the input voltage is lower than the nominal output voltage plus the specified dropout voltage. However, make sure all other conditions are met for normal operation. In dropout operation, the pass transistor is in the ohmic or triode region of operation, and acts as a switch. Because of this operation, the transient performance of the device becomes significantly degraded. Line or load transients in dropout potentially result in large output voltage deviations.
When the device is in a steady dropout state, the pass transistor is driven into the ohmic or triode region. This state is defined as when the device is in dropout, directly after being in a normal regulation state, but not during start up. During dropout, VIN < VOUT(NOM) + VDO. When the input voltage returns to a value ≥ VOUT(NOM) + VDO, the output voltage overshoots for a short period of time. During this time, the device pulls the pass transistor back into the linear region. VOUT(NOM) is the nominal output voltage and VDO is the dropout voltage.