MAX5037 Datasheet, PDF (6/30 Pages) Maxim Integrated Products – VRM 9.0, Dual-Phase, Parallelable, Average Current-Mode Controller

VRM 9.0, Dual-Phase, Parallelable,
Average Current-Mode Controller
Typical Operating Characteristics (continued)
(Circuit of Figure 1, T_A = +25°C, unless otherwise noted.)
CURRENT-SENSE THRESHOLD
vs. OUTPUT VOLTAGE
55
54
53
52
51
50
49 ^{PHASE 2}
48 _{PHASE 1}
47
46
45
1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8
V_OUT (V)
OVERVOLTAGE THRESHOLD (PGOOD)
vs. INPUT VOLTAGE
2.0
1.9
V_OUT = +1.8V
1.8
1.7
1.6
1.5
1.4
1.3
1.2
V_OUT = +1.1V
1.1
1.0
4.75 4.80 4.85 4.90 4.95 5.00 5.05 5.10 5.15 5.20 5.25
V_IN (V)
UNDERVOLTAGE THRESHOLD (PGOOD)
vs. INPUT VOLTAGE
1.75
1.65
V_OUT = +1.8V
1.55
1.45
1.35
1.25
1.15
1.05
V_OUT = +1.1V
0.95
0.85
0.75
4.75 4.80 4.85 4.90 4.95 5.00 5.05 5.10 5.15 5.20 5.25
V_IN (V)
OUTPUT VOLTAGE
vs. I_LOAD AND R_CNTR
1.90
R_CNTR = 50kΩ
1.85
1.80
R_CNTR = 100kΩ
1.75
1.70
R_CNTR = 200kΩ
1.65
R_CNTR = ∞
V_IN = +12V
VID SETTING = +1.75V
1.60
0 5 10 15 20 25 30 35 40 45 50 55
I_LOAD (A)
OUTPUT VOLTAGE vs. OUTPUT CURRENT
AND ERROR AMP GAIN (R_F / R_IN)
1.85
V_IN = +12V
V_OUT = +1.8V
1.80
R_f / R_IN = 15
R_f / R_IN = 12.5
1.75
1.70
R_f / R_IN = 7.5
1.65
R_f / R_IN = 10
DIFFERENTIAL AMPLIFIER BANDWIDTH
3.5
90 ^{MAX5037 toc17}
3.0
45
PHASE
0
2.5
-45
2.0
-90
1.5
-135
GAIN
1.0
-180
0.5
-225
1.60
0
5 10 15 20 25 30 35 40 45 50 55
I_LOAD (A)
0
0.01
0.1
1
FREQUENCY (MHz)
-270
10
OVERVOLTAGE THRESHOLD (OVPOUT)
vs. INPUT VOLTAGE
2.1
2.0
V_OUT = +1.8V
1.9
1.8
1.7
1.6
1.5
1.4
1.3
V_OUT = +1.1V
1.2
1.1
4.75 4.80 4.85 4.90 4.95 5.00 5.05 5.10 5.15 5.20 5.25
V_IN (V)
OUTPUT VOLTAGE
vs. I_LOAD AND R_CNTR
1.60
V_IN = +12V
1.55
VID SETTING = +1.4V
R_CNTR = 50kΩ
1.50
1.45
1.40
R_CNTR = 100kΩ
1.35
R_CNTR = 200kΩ
1.30
R_CNTR = ∞
1.25
1.20
0
5 10 15 20 25 30 35 40 45 50 55
I_LOAD (A)
DIFF OUTPUT ERROR
vs. SENSE+ TO SENSE- VOLTAGE
0.200
0.175
V_IN = +12V
NO DRIVER
0.150
0.125
0.100
0.075
0.050
0.025
0
1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0
∆V_SENSE (V)
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