MAX6651 MAXIM [Maxim Integrated Products], MAX6651 Datasheet - Page 4

• Manufacturer Part Number: MAX6651
• Description: Fan-Speed Regulators and Monitors with SMBus/I2C-Compatible Interface
• Manufacturer: MAXIM [Maxim Integrated Products]

TIMING CHARACTERISTICS (continued)
(V
Fan-Speed Regulators and Monitors
with SMBus/I
Note 1: For proper measurement of V
Note 2: GPIO2, GPIO3, and GPIO4 only in the MAX6651.
Note 3: Note that the transition must internally provide at least a hold time to bridge the undefined region (300ns max) of SCL’s
Note 4: C
(T
4
Setup Time for Stop Condition
Pulse Width of Spike Suppressed
CC
A
2.20
2.15
2.10
2.05
2.00
1.95
1.90
1.85
1.80
= +25°C, unless otherwise noted.)
265
260
255
250
245
240
_______________________________________________________________________________________
= 3.0V to 5.5V, T
3.0
3.0
falling edge.
V
INTERNAL OSCILLATOR FREQUENCY
PARAMETER
B
CC
FEEDBACK VOLTAGE vs. SUPPLY
is the total capacitance of one bus line in pF. Tested with C
and 0.7 x V
VOLTAGE (DAC SET TO 35)
3.5
3.5
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
V
4.0
V
FAN
4.0
FAN
A
= 12.0V
= -40°C to +85°C, unless otherwise noted. Typical values are at T
= 5.5V
CC
4.5
4.5
.
5.0
5.0
SYMBOL
2
t
SU:STO
t
SPIKE
FB
C-Compatible Interface
5.5
5.5
, connect OUT and FB as shown in the Typical Operating Circuit.
300
280
260
240
220
200
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4
2.2
2.0
-50
3.0
INTERNAL OSCILLATOR FREQUENCY
3.2
3.4
vs. SUPPLY VOLTAGE
vs. TEMPERATURE
SUPPLY CURRENT
3.6
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
CONDITIONS
0
3.8
V
CC
V
4.0
= 3.0V
CC
B
Typical Operating Characteristics
= 5.5V
4.2
= 400pF. Rise and fall times are measured between 0.3 x
50
4.4
4.6
4.8 5.0
100
A
= +25°C and V
2.2
1.9
2.5
2.4
2.3
2.1
2.0
1.8
4.0
3.5
3.0
2.5
2.0
1.5
-50
-40
MIN
SUPPLY CURRENT vs. TEMPERATURE
0.6
0
V
-20
CC
= 5.5V
FEEDBACK VOLTAGE
vs. TEMPERATURE
V
CC
0
FAN
TEMPERATURE (°C)
TYP
V
0
TEMPERATURE (°C)
50
FAN
= 12.0V, V
= 5V.)
= 5.5V, V
V
20
CC
V
CC
= 3.0V
= 5.5V,
V
40
FAN
MAX
CC
FAN
50
= 3V
= 5.5V
= 12.0V
60
UNITS
80
µs
ns
100
100