Datasheet

MAX8632
Integrated DDR Power-Supply Solution for
Desktops, Notebooks, and Graphic Cards
6 _______________________________________________________________________________________
Typical Operating Characteristics
(V
VIN
= 12V, V
OUT
= 2.5V, TON = GND, SKIP = AV
DD
, circuit of Figure 8, T
A
= +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
(TON = GND)
MAX8632 toc01
I
LOAD
(A)
EFFICIENCY (%)
1010.1
60
70
80
90
100
50
10
20
30
40
0
0.01 100
f
SW
= 600kHz
V
OUT
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.5V
SKIP = GND
SKIP = AV
DD
EFFICIENCY vs. LOAD CURRENT
(TON = OPEN)
MAX8632 toc02
I
LOAD
(A)
EFFICIENCY (%)
1010.1
10
20
30
40
50
60
70
80
90
100
0
0.01 100
f
SW
= 300kHz
V
OUT
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.5V
SKIP = GND
SKIP = AV
DD
SWITCHING FREQUENCY vs. LOAD CURRENT
(TON = GND)
MAX8632 toc03
I
LOAD
(A)
FREQUENCY (kHz)
11108 92 3 4 5 6 71
50
100
150
200
250
300
350
400
450
500
550
600
650
700
0
012
SKIP = GND
SKIP = AV
DD
SWITCHING FREQUENCY vs. INPUT VOLTAGE
(TON = GND)
MAX8632 toc04
V
IN
(V)
FREQUENCY (kHz)
262420 228 10 12 14 16 186
420
440
460
480
500
540
520
560
580
600
620
640
660
680
700
400
428
I
LOAD
= 12A
I
LOAD
= 0A
SWITCHING FREQUENCY vs. TEMPERATURE
(TON = GND)
MAX8632 toc05
TEMPERATURE (°C)
FREQUENCY (kHz)
80655035205-10-25
650
660
670
680
690
700
600
640
630
620
610
-40
I
LOAD
= 12A
OUTPUT VOLTAGE
vs. LOAD CURRENT
MAX8632 toc06
I
LOAD
(A)
V
OUT
(V)
12106 842
2.495
2.500
2.505
2.510
2.515
2.520
2.525
2.530
2.535
2.540
2.490
014
V
IN
= 15V,
TON = GND
SKIP = GND
SKIP = AV
DD
VTT VOLTAGE
vs. VTT CURRENT
MAX8632 toc07
I
VTT
(A)
V
VTT
(V)
V
VTT
(V)
21-2 -1 0
1.20
1.22
1.24
1.26
1.28
1.30
1.32
1.34
1.18
0.86
0.87
0.88
0.89
0.90
0.91
0.92
0.93
0.85
-3 3
V
VTT
= 0.9V
V
VTT
= 1.25V
VTTR VOLTAGE
vs. VTTR CURRENT
MAX8632 toc08
I
VTTR
(mA)
V
VTTR
(V)
105-10 -5 0
1.21
1.22
1.23
1.24
1.25
1.26
1.27
1.28
1.20
-15 15
LINE REGULATION
(V
OUT
vs. V
IN
)
MAX8632 toc09
V
IN
(V)
V
OUT
(
V
)
262420 228 10 12 14 16 186
2.46
2.47
2.48
2.49
2.50
2.51
2.52
2.53
2.54
2.55
2.45
428
I
LOAD
= 0A
I
LOAD
= 12A