ADP2386ACPZN-R7 datasheet(14/24 Pages) AD

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ADP2386

Data Sheet

Rev. A | Page 14 of 24

OVERVOLTAGE PROTECTION (OVP)

The ADP2386 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, the internal

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

ADP2386 resumes normal operation.

UNDERVOLTAGE LOCKOUT (UVLO)

Undervoltage lockout circuitry is integrated in the ADP2386 to

prevent the occurrence of power-on glitches. If the VPVIN voltage

falls to less than 3.8 V typical, the part shuts down, and both the

power switch and synchronous rectifier turn off. When the

VPVIN voltage rises to greater than 4.3 V typical, the soft start

period is initiated, and the part is enabled.

THERMAL SHUTDOWN

If the ADP2386 junction temperatures rises to greater than 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 shut-down circuit so that, if an overtemperature

event occurs, the ADP2386 does not return to normal operation

until the on-chip temperature falls to less than 125°C. Upon

recovery, a soft start is initiated before normal operation begins.

ADP2386ACPZN-R7 Datasheet(PDF) 14 Page - Analog Devices