MAX8535/MAX8536/MAX8585
ORing MOSFET Controllers with Fastest
Fault Isolation for Redundant Power Supplies
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 12V (MAX8535/MAX8535A/MAX8585), V
CC
= 5V (MAX8536), V
CS
= V
CC
- 0.1V, R
TIMER
= 25kΩ, UVP = 2V, OVP = 1V, C
GATE
= 0.01µF, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
CHARGE-PUMP VOLTAGE
Measured from V
GATE
to V
CC
, V
CC
= 3.3V
(MAX8536)
56
V
CC
= 5V (MAX8536) 5 6
Gate Voltage V
GATE
V
C C
= 12V ( M AX 8535/M AX 8535A/M AX 8585) 9 12
V
TIMER
TIMER Voltage
1.200 1.281
TIMER Maximum Source Current
120
µA
TIMER High-Input Current V
TIMER
= 1.5V 20 µA
MAX8535/MAX8535A/MAX8585 1.5 3.4
TIMER Maximum Frequency
Select Voltage Input Range
MAX8536 1.5
V
CC
- 0.6
V
TIMER Logic High V
IH
Charge pump enabled 1.1 V
TIMER Logic Low V
IL
Charge pump disabled 0.5 V
FAULT
Fault Output Low Voltage I
FAULT
= 0.5mA 0.8 V
Fault Sink Current FAULT = 0.8V 0.5 mA
FAULT = 18V (MAX8535/
MAX8535A/MAX8585)
5
Fault Leakage Current
FAULT = 6V (MAX8536) 5
µA
GATE
Gate On Threshold Measured from V
CC
to CS 0.3 0.5 V
I
TIMER
= 0µA (MAX8535/
MAX8535A/MAX8585)
35 65
V
GATE
=
V
CC
= 12V
I
TIMER
= 50µA (MAX8535/
MAX8535A/MAX8585)
15 36
I
TIMER
= 0µA (MAX8536) 17 33
Gate-Drive Current
V
GATE
=
V
CC
= 5V
I
TIMER
= 50µA (MAX8536) 8 16
µA
Gate Shutdown Delay
From fault sense to the start of gate voltage
falling, or from TIMER to the start of gate
voltage falling
300
ns
GATE = V
CC
+ 5V (MAX8535/MAX8536)
100 300
Gate Discharge Current
MAX8535A/MAX8585
200 400
mA
CURRENT SENSE
Measured from CS to V
CC
(MAX8535/MAX8535A/MAX8586)
20 40
Reverse-Current Threshold
MAX8585 -5 +5
mV
Forward-Current Threshold Measured from V
CC
to CS 5 15 mV
