ISL6550A Datasheet, PDF (8/11 Pages) Intersil Corporation – SAM Supervisor And Monitor

ISL6550A, ISL6550C
Logic Options
OPTION DEFINITIONS
START Pin:
PEN input is high AND
VCC is above the UVLO threshold AND
OV condition does not exist AND
UVDLY condition does not exist.
Fault Latch is not set.
PGOOD Pin:
VCC is above the UVLO threshold AND
UV condition does not exist AND
OV condition does not exist AND
PEN input is high AND
Fault latch is not set.
Fault Latch Set by:
OV condition OR
UVDLY condition (UV has persisted past the UVDLY time-out)
Fault Latch Reset by:
OV condition does not exist AND
UVDLY condition does not exist AND
VCC below UVLO threshold OR
PEN input low
OVUV Detection:
UV detect threshold = Vovuvth (voltage at OVUVTH pin)
OV detect threshold = Vbdac + (Vbdac - Vovuvth)
UV and OV threshold hysteresis = 10% of (Vbdac - Vovuvth)
UV and OV threshold hysteresis = 40% of (Vbdac - Vovuvth)
A
C
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
8
FN9036.4
January 18, 2005