Datasheet

MAX5938
-48V Hot-Swap Controller with V
IN
Step Immunity,
No R
SENSE
, and Overvoltage Protection
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
EE
= -10V to -80V, V
IN
= (GND - V
EE
), V
STEP_MON
=V
EE
, R
LP
= 200Ω, V
ON
= V
OFF
= 2V, V
OV
= V
CB_ADJ
= V
EE
, POL_SEL open, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
EE
= -48V, T
A
= +25°C.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CIRCUIT BREAKER AND SHORT CIRCUIT
T
A
= +85°C 55 72 89
T
A
= +25°C 39 50 61
CB_ADJ Bias Current
I
CB_ADJ
CB_ADJ = V
EE
T
A
= -40°C 33
µA
T
A
= +85°C 59 72 85
T
A
= +25°C 41 50 59
CB_ADJ = V
EE
T
A
= -40°C 33
T
A
= +85°C 123
144 165
T
A
= +25°C 85
100 115
T
A
= -10°C 66 82 98
Circuit-Breaker Threshold V
CB
R
CB_ADJ
= 2kΩ
T
A
= -40°C 66
mV
I
CB_ADJ
Temperature Coefficient -40°C < T
A
< +85°C
6000
ppm/°C
Circuit-Breaker Glitch Rejection
t
CB_DLY
1.0 1.2 1.6 ms
T
A
= +85°C 112
144 176
T
A
= +25°C 75
100 125
T
A
= -10°C 50 82
114
CB_ADJ = V
EE
T
A
= -40°C 66
T
A
= +85°C 224
288 352
T
A
= +25°C 159
200 241
T
A
= -10°C 108
164 220
Short-Circuit Threshold (Note 5) V
SC
R
CB_ADJ
= 2kΩ
T
A
= -40°C
132
mV
Short-Circuit Response Time
150mV overdrive, C
LOAD
= 0,
to GATE below 1V
330 500
ns
INPUT-VOLTAGE STEP PROTECTION
Input-Voltage-Step Detection
Threshold
STEP
TH
1.219 1.25 1.281
V
Input-Voltage-Step Threshold
Offset Current
I
STEP_OS
-10.8
-10
-9.2
µA
LOAD-PROBE CIRCUIT
Load-Probe Switch On-Resistance
V
LP
- V
EE
= 1V 7.5 11 Ω
Load-Probe Timeout t
LP
80
220 380
ms
Load-Probe Retry Time t
LP_OFF
16 x
t
LP
s
Shorted Load Detection Voltage
Threshold
V
TH_LP
Referenced to GND
-220 -200 -180
mV