MAX5079 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX5079 Datasheet PDF : 18 Pages
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ORing MOSFET Controller with
Ultra-Fast 200ns Turn-Off
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted. See the Typical Operating Circuit.)
SLOW-COMPARATOR BLANKING TIME
tSTH vs. CSTH (RSTH = 180kΩ)
100
90 75mV OVERDRIVE
80
70
60
50
40
30
20
10
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
CSTH (µF)
FAST-COMPARATOR REVERSE VOLTAGE
THRESHOLD (VFTH vs. RFTH)
1.5
1.4
1.3
1.2
1.1
TA = +85°C
1.0
0.9
TA = +125°C
0.8
0.7
0.6
0.5
0.4
TA = -40°C
0.3
0.2
0.1
0
0 20 40 60 80 100 120 140
RFTH (kΩ)
FAST-COMPARATOR RESPONSE TIME
80
72
VIN = 1V, VAUXIN = 5V
VIN = 5V, VAUXIN = 0V
64
56
48
40
32
24 VIN = 2.75V,
VAUXIN = 12V
16
VIN = 12V,
VAUXIN = 0V
8
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
CHARGE-PUMP FREQUENCY
vs. INPUT VOLTAGE
80
78
76
TA = +125°C
TA = +85°C
74
72
70
68
TA = +25°C TA = -40°C
66
64
62
60
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
VIN (V)
GATE-CHARGE CURRENT vs. CEXT
6.0
5.5
VIN = 12V
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
1
10
100
CEXT (nF)
FAULT CURRENT WAVEFORM
(IN SHORTED TO PGND)
MAX5079 toc09
MOSFET REVERSE
CURRENT
5A/div
BUS
5V/div
400ns/div
VIN = 5V, VBUS = 5V,
VAUXIN = 0V, CSTH = 0,
RSTH = OPEN, RFTH = 0,
UVLO = IN
GATE
10V/div
IN
5V/div
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