Datasheet
4 Maxim Integrated
1V to 16V, Single-Channel, Hot-Swap Controllers
with Precision Current-Sensing Output
MAX5977A/MAX5977B
ELECTRICAL CHARACTERISTICS (continued)
(V
PWR
= V
IN
= 12V, R
SENSE
= 4mI, R
FCOMP
= R
SCOMP
= 2kI, R
GATE
= 1kI, C
GATE
= 330nF, C
REG
= 1FF, unless otherwise noted.
Typical Values at V
PWR
= V
IN
= 3.3V, T
A
= +25NC, unless otherwise noted.) (Note 2)
Note 2: All devices 100% tested at T
A
= +25°C. Limits over temperature guaranteed by design.
Typical Operating Characteristics
(V
PWR
= V
IN
= 3.3V, T
A
= +25NC, R
FCOMP
= R
SCOMP
= 2kI, R
GATE
= 1kI, C
GATE
= 330nF, C
REG
= 1FF, unless otherwise noted.)
I
PWR
vs. V
PWR
MAX5977 toc01
V
PWR
(V)
I
PWR
(mA)
15105
0.64
0.65
0.66
0.67
0.68
0.69
0.70
0.71
0.72
0.73
0.63
02
0
V
IN
- V
SENSE
vs. I
CSOUT
V
IN
- V
SENSE
(mV)
I
CSOUT
(µA)
40302010
25
50
75
100
125
0
05
0
MAX5977 toc02
V
IN
= V
PWR
= 12V
R
CSOUT
= 10kI
TRANSCONDUCTANCE
vs. TEMPERATURE
MAX5977 toc03
TEMPERATURE (°C)
Gm (µS)
7550250-25
2460
2470
2480
2490
2500
2510
2520
2530
2540
2550
2450
-50 100
V
IN
= V
PWR
= 12V
V
IN
- V
SENSE
= 10mV AND 50mV
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CHARGE PUMP (GATE)
Charge-Pump Output Voltage V
OHGATE
Relative to V
SOURCE
4.5 5 5.5 V
Charge-Pump Output Source
Current
I
GATEPU
V
GATE
= V
SOURCE
= 0V 4 5 6
FA
V
IN
- V
SOURCE
< 100mV 8 10 12
Charge-Pump Pulldown Current I
GATEPD
V
GATE
= 2V, V
SOURCE
= 0 to 16V 500 mA
OUTPUTS (FAULT, PG)
Output Voltage Low
V
OLFAULT
/
V
OLPG
I
SINK
= 3.2mA 0.4 V
Output Leakage (Open Drain)
I
LKFAULT
/
I
LKPG
Tested at 0V and 5.2V 1
FA
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 V
ILCAL
0.4 V
CAL High-Voltage Input V
IHCAL
1.4 V
CAL Input Current I
IHCAL
V
CAL
= 2.5V, the CAL input pulls low if left
unconnected
20
FA
CALSENSE Input Current ±300
FA
FAULT RESPONSE
Retry Timeout Period t
RETRY
MAX5977B 175 ms