C-compatible interface, Typical operating characteristics, Timing characteristics (continued) – Rainbow Electronics MAX6651 User Manual
Page 4
MAX6650/MAX6651
Fan-Speed Regulators and Monitors
with SMBus/I
2
C-Compatible Interface
4
_______________________________________________________________________________________
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
240
245
255
250
260
265
3.0
4.0
3.5
4.5
5.0
5.5
INTERNAL OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
MAX6650/51-01
SUPPLY VOLTAGE (V)
FREQUENCY (kHz)
200
220
260
240
280
300
INTERNAL OSCILLATOR FREQUENCY
vs. TEMPERATURE
MAX6650/51-02
TEMPERATURE (
°C)
FREQUENCY (kHz)
-50
0
50
100
V
CC
= +5.5V
V
CC
= +3.0V
2.0
2.1
2.3
2.2
2.4
2.5
FEEDBACK VOLTAGE
vs. TEMPERATURE
MAX6650/51-03
TEMPERATURE (
°C)
FEEDBACK VOLTAGE (V)
-50
0
50
100
1.9
1.8
V
CC
= +5.5V,
V
FAN
= +5.5V, V
FAN
= +12.0V
V
FAN
= +12.0V, V
FAN
= +5.5V
V
CC
= +3.0V
1.80
1.85
1.90
1.95
2.00
2.05
2.10
2.15
2.20
3.0
3.5
4.0
4.5
5.0
5.5
FEEDBACK VOLTAGE vs. SUPPLY
VOLTAGE (DAC SET TO 35)
MAX6650/51-04
SUPPLY VOLTAGE (V)
FEEDBACK VOLTAGE (V)
V
FAN
= +5.5V
V
FAN
= +12.0V
2.0
2.4
2.2
2.8
2.6
3.0
3.2
3.6
3.4
3.8
3.0
3.4
3.8
4.2
4.6
3.2
3.6
4.0
4.4
4.8 5.0
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX6650/51-05
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
1.5
2.0
3.0
2.5
3.5
4.0
-40
0
-20
20
40
60
80
100
SUPPLY CURRENT vs. TEMPERATURE
MAX6650/51-06
TEMPERATURE (
°C)
SUPPLY CURRENT (mA)
V
CC
= +5.5V
V
CC
= +3V
TIMING CHARACTERISTICS (continued)
(V
CC
= +3.0V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C and V
CC
= +5V.)
Note 1: For proper measurement of V
FB
, connect OUT and FB as shown in the Typical Operating Circuit.
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
falling edge.
Note 4: C
B
is the total capacitance of one bus line in pF. Tested with C
B
= 400pF. Rise and fall times are measured between 0.3 x
V
CC
and 0.7 x V
CC
.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
µs
ns
0
50
0.6
t
SPIKE
t
SU:STO
Setup Time for Stop Condition
Pulse Width of Spike Suppressed