MAX1981A Maxim Integrated Products, MAX1981A Datasheet - Page 9

• Manufacturer Part Number: MAX1981A
• Description: (MAX1907A / MAX1981A) Quick-PWM Master Controllers
• Manufacturer: Maxim Integrated Products

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(Circuit of Figure 1, V+ = 12V, V
Positioned CPU Core Power Supplies (IMVP-IV)
1.46
1.44
1.42
1.40
1.38
1.36
1.34
1.32
1.30
1.28
100
90
80
70
60
50
-1
-2
-3
3
2
1
0
0.1
-40
0
vs. LOAD CURRENT (V
EFFICIENCY vs. LOAD CURRENT
V
VOLTAGE-POSITIONED OUTPUT
-20
IN
V
= 8V
10
Quick-PWM Master Controllers for Voltage-
OUTPUT VOLTAGE SHIFT
IN
= 5V
vs. TEMPERATURE
0
(V
TEMPERATURE (°C)
LOAD CURRENT (A)
LOAD CURRENT (A)
1
OUT
20
_______________________________________________________________________________________
20
= 0.844V)
V
IN
40
V
30
= 20V
IN
OUT
20A LOAD
= 12V
10
60
= 1.436V)
CC
NO LOAD
40
= V
80
DD
100
100
50
= 5V, B0–B2 set to 1.276V, S0–S2 set to 0.748V.)
0.77
0.76
0.75
0.74
0.73
0.72
0.71
0.70
0.69
0.68
0.67
100
400
350
300
250
200
150
100
90
80
70
60
50
50
0
0.1
0
0
vs. LOAD CURRENT (V
SUS = V
V
FREQUENCY vs. LOAD CURRENT
SKIP OPERATION
EFFICIENCY vs. LOAD CURRENT
VOLTAGE-POSITIONED OUTPUT
IN
V
IN
5
= 8V
5
= 5V
CC
(V
LOAD CURRENT (A)
LOAD CURRENT (A)
LOAD CURRENT (A)
10
1
OUT
10
FORCED PWM
= 1.436V)
15
V
V
IN
IN
Typical Operating Characteristics
= 20V
15
= 12V
OUT
10
20
SINGLE PHASE
= 0.748V)
20
25
100
25
30
0.86
0.84
0.82
0.80
0.78
0.76
0.74
100
350
330
310
290
270
250
230
90
80
70
60
50
0.1
0
0
.
SINGLE PHASE
vs. LOAD CURRENT (V
V
FREQUENCY vs. INPUT VOLTAGE
EFFICIENCY vs. LOAD CURRENT
VOLTAGE-POSITIONED OUTPUT
IN
5
5
= 8V
V
IN
V
= 5V
IN
(V
LOAD CURRENT (A)
INPUT VOLTAGE (V)
LOAD CURRENT (A)
10
10
= 20V
1
OUT
NO LOAD
= 0.748V)
V
15
15
IN
= 12V
OUT
10
20
20
= 0.844V)
I
OUT
SUS = V
25
25
= 20A
CC
100
30
30
9