Datasheet

MAX5938
-48V Hot-Swap Controller with V
IN
Step Immunity,
No R
SENSE
, and Overvoltage Protection
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Timing Table
NAME
SYMBOL
TYPICAL
TIME (s)
Power-Up Delay t
ONDLY
220m
Load-Probe Test Timeout t
LP
220m
Load-Probe Retry Time t
LP_OFF
3.5
PGOOD Assertion
Delay Time
t
PGOOD
1.26m
Autoretry Delay t
RETRY
3.5
Circuit-Breaker Glitch Rejection t
CB_DLY
1.4m
ON Glitch Rejection t
REJ
1.5m
OV Transient Rejection t
OVREJ
1.5m
GATE Pulldown Pulse Following
a V
IN
Step
— 350µ
GATE Low after a V
IN
Step,
Prior to Ramp
—1m
*OPTIONAL COMPONENT.
**OPTIONAL COMPONENT REPLACED BY SHORT.
MAX5938
PGOOD
V
OUT
OFF
C
LOAD
DC-DC
CONVERTER
V+
ON
V-
BACKPLANE
GND
-48V
**
*
GATE
V
EE
STEP_MON
LP
GND
POL_SEL
ON
OV
CB_ADJ
(V
IN
= GND - V
EE
)
V
IN
Typical Operating Circuit
Chip Information
TRANSISTOR COUNT: 2320
PROCESS: BiCMOS