ADP2387ACPZN-R7 datasheet(14/25 Pages) AD

14 / 25 page

ADP2387

Data Sheet

Rev. C | Page 14 of 25

UNDERVOLTAGE LOCKOUT (UVLO)

Undervoltage lockout circuitry is integrated in the ADP2387 to

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

drops below 3.8 V typical, the device shuts down and both the

power switch and synchronous rectifier turn off. When the VPVIN

voltage rises again above 4.3 V typical, the soft start period is

initiated and the device is enabled.

THERMAL SHUTDOWN

If the ADP2387 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. If an overtemperature event

occurs, the ADP2387 does not return to normal operation until

the on-chip temperature falls below 125°C because a 25°C

hysteresis is included in the thermal shutdown circuit. Upon

recovery, a soft start initiates before normal operation begins.

ADP2387ACPZN-R7 数据表(PDF) 14 Page - Analog Devices