Datasheet

MAX5921/MAX5939
-48V Hot-Swap Controllers with External
R
SENSE
and High Gate Pulldown Current
_______________________________________________________________________________________ 7
Timing Diagrams (continued)
DRAIN
PWRGD
PWRGD
DRAIN
1.4V
1.4V
V
EE
V
EE
V
EE
1V
1V
t
PHLDL
t
PHLDL
V
DCEN
- V
DRAIN
= 0V
Figure 5a. DRAIN to PWRGD /PWRGD Timing
∆V
GATE
- V
GATE
= 0V
1.4V
GATE
PWRGD
1V
V
EE
V
EE
∆V
GATE
- V
GATE
= 0V
GATE
PWRGD
1.4V
V
DCEN
- V
DRAIN
= 0V
t
PHLGH
t
PHLGH
1V
Figure 5b. GATE to PWRGD /PWRGD Timing
UVLO
V
DD
AND
REFERENCE
GENERATOR
LOGIC
OUTPUT
DRIVER
GATE
DRIVER
MAX5921/MAX5939
REF
50mV
UV
OV
V
DD
V
DD
REF
V
EE
SENSE GATE DRAIN
V
DL
V
GH
∆V
GATE
PWRGD
PWRGD
V
EE
Block Diagram