SMH4804 Datasheet, PDF (18/41 Pages) Summit Microelectronics, Inc. – -48V Programmable Hot Swap Sequencing Power Controller

Timing Diagram
SMH4804
Power-on Timing
Figure 13 illustrates some power on sequences, including the UV and OV differentials to their reference, and
Power Good cascading. Refer to the table on page 17 for more information on the t_PDD and t_CBD timings.
V_DD
UV
OV
PD1#/
PD2#
VGATE
DRAIN
SENSE
CBSENSE
PG1#
PG2#
PG3#
PG4#
18
11 ≤ V_DD ≤ 13
2.5V_REF
t_PDD
5V
50mV_REF
<t_PUVF
V_DD – V_GT
2.5V_REF
V_DD Note - A 'Fault' condition
has caused Drain
Sense to go high.
t_PGD
<t_CBD
t_PGD
t_PGD
Figure 13. SMH4804 Power-On Sequences
2050 3.7 10/30/02
2050 Fig01 2.1
Summit Microelectronics