Datasheet

ADP2384 Data Sheet
Rev. 0 | Page 14 of 24
OVERVOLTAGE PROTECTION (OVP)
The ADP2384 includes an overvoltage protection feature
to protect the regulator against an output short to a higher
voltage supply or when a strong load disconnect transient
occurs. If the feedback voltage increases to 0.7 V, t h e i n ternal
high-side and low-side MOSFETs are turned off until the
voltage at the FB pin decreases to 0.63 V. At that time, the
ADP2384 resumes normal operation.
UNDERVOLTAGE LOCKOUT (UVLO)
Undervoltage lockout circuitry is integrated in the ADP2384 to
prevent the occurrence of power-on glitches. If the V
PVIN
voltage
falls below 3.8 V typical, the part shuts down and both the
power switch and synchronous rectifier turn off. When the
V
PVIN
voltage rises above 4.3 V typical, the soft start period
is initiated and the part is enabled.
THERMAL SHUTDOWN
If the ADP2384 junction temperatures rises above 150°C, the
internal thermal shutdown circuit turns off the regulator for self-
protection. Extreme junction temperatures can be the result of
high current operation, poor circuit board thermal design,
and/or high ambient temperature. A 25°C hysteresis is included
in the thermal shutdown circuit so that, if an overtemperature
event occurs, the ADP2384 does not return to normal operation
until the on-chip temperature falls below 125°C. Upon recovery, a
soft start is initiated before normal operation begins.