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1V to 16V, Single-Channel, Hot-Swap Controllers
with Precision Current-Sensing Output
ELECTRICAL CHARACTERISTICS (continued)
(V PWR = V IN = 12V, R SENSE = 4m I , R FCOMP = R SCOMP = 2k I , R GATE = 1k I , C GATE = 330nF, C REG = 1 F F, unless otherwise noted.
Typical Values at V PWR = V IN = 3.3V, T A = +25 N C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CHARGE PUMP (GATE)
Charge-Pump Output Voltage
Charge-Pump Output Source
Current
Charge-Pump Pulldown Current
V OHGATE
I GATEPU
I GATEPD
Relative to V SOURCE
V GATE = V SOURCE = 0V
V IN - V SOURCE < 100mV
V GATE = 2V, V SOURCE = 0 to 16V
4.5
4
8
5
5
10
500
5.5
6
12
V
F A
mA
OUTPUTS ( FAULT , PG)
Output Voltage Low
Output Leakage (Open Drain)
V OLFAULT /
V OLPG
I LKFAULT /
I LKPG
I SINK = 3.2mA
Tested at 0V and 5.2V
0.4
1
V
F A
UV/OV COMPARATOR INPUTS
UV/OV Threshold
V UV/OVR
UV, OV rising input voltage threshold
580
590
600
mV
UV/OV Threshold Hysteresis
V UV/OVHYS UV, OV falling input hysteresis
4
%
UV/OV Input Current
I LKUV/
I LKOV
V UV = V OV = 0V and 5.5V
-100
+100
nA
CALIBRATION MODE
CAL Low-Voltage Input
CAL High-Voltage Input
V ILCAL
V IHCAL
1.4
0.4
V
V
CAL Input Current
CALSENSE Input Current
I IHCAL
V CAL = 2.5V, the CAL input pulls low if left
unconnected
20
±300
F A
F A
FAULT RESPONSE
Retry Timeout Period
t RETRY
MAX5977B
175
ms
Note 2: All devices 100% tested at TA = +25°C. Limits over temperature guaranteed by design.
Typical Operating Characteristics
(V PWR = V IN = 3.3V, T A = +25 N C, R FCOMP = R SCOMP = 2k I , R GATE = 1k I , C GATE = 330nF, C REG = 1 F F, unless otherwise noted.)
0.73
I PWR vs. V PWR
125
V IN - V SENSE vs. I CSOUT
2550
TRANSCONDUCTANCE
vs. TEMPERATURE
0.72
0.71
0.70
0.69
0.68
0.67
0.66
100
75
50
2540
2530
2520
2510
2500
2490
2480
V IN = V PWR = 12V
V IN - V SENSE = 10mV AND 50mV
0.65
0.64
25
V IN = V PWR = 12V
R CSOUT = 10k I
2470
2460
0.63
0
5
10
15
20
0
0
10
20
30
40
50
2450
-50
-25
0
25
50
75
100
4
V PWR (V)
V IN - V SENSE (mV)
TEMPERATURE (°C)
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