MIC2589/2595
Micrel
Timing Diagrams
OVERCURRENT
EVENT
t < tFLT
t ≥ tFLT
ILIMIT
ILOAD
tNLD
INLDTH
0A
Output OFF
(at VDD
Load current is regulated
at ILIMIT = 50mV/RSENSE
)
VDRAIN
(at VEE
)
(at VEE
)
(at VEE)
VUV or VOFF
VUVL
V
UVH —
Reduction in VDRAIN to support
ILIMIT = 50mV/RSENSE
(VUV
—
VEE)
(VUV VEE
)
(at VEE
)
Figure 1. Overcurrent and Undercurrent (No Load) Response
100mV
VSENSE - VEE
tOCSENSE
VGATE
1V
Figure 2. SENSE to GATE LOW Timing Response
1.223V
1.203V
VOV
tOVPHL
tOVPLH
VGATE
1V
1V
Figure 3. MIC2589/89R Overvoltage Response
M9999-031504
8
March 2004