Datasheet

MAX8535/MAX8536/MAX8585
ORing MOSFET Controllers with Fastest
Fault Isolation for Redundant Power Supplies
_______________________________________________________________________________________ 3
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
= 0°C to +85°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
R
TIMER
= 20kΩ
187
R
TIMER
= 125kΩ
450
R
TIMER
= open
500
Charge-Pump Switching
Frequency
V
TIMER
= 1.5V
550
kHz
TIMER
TIMER Voltage
1.219 1.25 1.281
V
TIMER Maximum Source Current
V
TIMER
= 1V 80
100 120
µA
TIMER High-Input Current V
TIMER
= 1.5V 10 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 1.0 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 ( MAX 8535 /MAX 8535A/MAX 8585)
5
Fault Leakage Current
FAULT = 6V (MAX8536) 5
µA
GATE
Gate On Threshold Measured from V
CC
to CS 0.3 0.4 0.5 V
I
TIMER
= 0µA (MAX8535/
MAX8535A/MAX8585)
35 50 65
V
GATE
=
V
CC
= 12V
I
TIMER
= 50µA (MAX8535/
MAX8535A/MAX8585)
15 25 36
I
TIMER
= 0µA (MAX8536) 17 25 33
Gate Drive Current
V
GATE
=
V
CC
= 5V
I
TIMER
= 50µA (MAX8536) 8 12 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
200 300
ns
GATE = V
CC
+ 5V (MAX8535/MAX8536)
100 200 300
Gate Discharge Current
GATE = V
CC
+ 5V (MAX8535A/MAX8585)
200 300 400
mA
G ate vol tag e fal l fr om faul t to V
GAT E
= V
C C
,
C
GAT E
= 0.01µF ( 200ns + C V /I = 700ns, typ )
(MAX8535/MAX8536)
0.7
Gate Fall Time
MAX8535A/MAX8585
0.55
µs
CURRENT SENSE
Measured from CS to V
CC
(MAX8535/MAX8535A/MAX8536)
20 30 40
Reverse-Current Threshold
MAX8585 -3 0 +3
mV