MAX8550(2004) Ver la hoja de datos (PDF) - Maxim Integrated
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MAX8550
(Rev.:2004)
(Rev.:2004)
Maxim Integrated
MAX8550 Datasheet PDF : 29 Pages
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Integrated DDR Power-Supply Solutions for
Desktops, Notebooks, and Graphic Cards
Typical Operating Characteristics
(VVIN = 12V, VOUT = 2.5V, TON = GND, SKIP = AVDD, circuit of Figure 8, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
(TON = GND)
100
90 fSW = 600kHz
80
VOUT = 2.5V
70
60
VOUT = 1.8V
50
VOUT = 1.5V
40
30
20
10
0
0.01
SKIP = GND
SKIP = AVDD
0.1
1
10
100
ILOAD (A)
SWITCHING FREQUENCY vs. INPUT VOLTAGE
(TON = GND)
700
680
660
640
ILOAD = 12A
620
600
580
560
540
520
500
480
ILOAD = 0A
460
440
420
400
4 6 8 10 12 14 16 18 20 22 24 26 28
VIN (V)
VTT VOLTAGE
vs. VTT CURRENT
1.28
1.27
1.26
1.25
1.24
1.23
1.22
1.21
1.20
-3 -2 -1 0 1 2 3
IVTT (A)
EFFICIENCY vs. LOAD CURRENT
(TON = OPEN)
100
90 fSW = 300kHz
80
70
VOUT = 2.5V
60
VOUT = 1.8V
50
VOUT = 1.5V
40
30
20
10
0
0.01
SKIP = GND
SKIP = AVDD
0.1
1
10
100
ILOAD (A)
SWITCHING FREQUENCY vs. TEMPERATURE
(TON = GND)
700
690
680
670
660
ILOAD = 12A
650
640
630
620
610
600
-40 -25 -10 5 20 35 50 65 80
TEMPERATURE (°C)
VTTR VOLTAGE
vs. VTTR CURRENT
1.28
1.27
1.26
1.25
1.24
1.23
1.22
1.21
1.20
-15 -10
-5 0 5
IVTTR (mA)
10 15
SWITCHING FREQUENCY vs. LOAD CURRENT
(TON = GND)
700
650
600
550
500
450
400
350
300
250
200
150
SKIP = GND
100
50
SKIP = AVDD
0
0 1 2 3 4 5 6 7 8 9 10 11 12
ILOAD (A)
OUTPUT VOLTAGE
vs. LOAD CURRENT
2.540
2.535
2.530
VIN = 15V,
TON = GND
2.525
2.520
2.515
2.510
2.505
2.500
SKIP = GND
SKIP = AVDD
2.495
2.490
0 2 4 6 8 10 12 14
ILOAD (A)
LINE REGULATION
(VOUT vs. VIN)
2.55
2.54
2.53
2.52
ILOAD = 0A
2.51
2.50
2.49
ILOAD = 12A
2.48
2.47
2.46
2.45
4 6 8 10 12 14 16 18 20 22 24 26 28
VIN (V)
6 _______________________________________________________________________________________
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