MAX8553(2003) Просмотр технического описания (PDF) - Maxim Integrated
Номер в каталоге
Компоненты Описание
производитель
MAX8553
(Rev.:2003)
(Rev.:2003)
Maxim Integrated
MAX8553 Datasheet PDF : 24 Pages
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4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
Typical Operating Characteristics
(VV+ = 12V, VOUT = 1.8V, circuit of Figure 1, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
(CIRCUIT OF FIGURE 2)
100
90
80
VIN = 1.8V
VOUT = 0.9V
70
VIN = 2.5V
VOUT = 1.25V
60
50
40
30
0.1
1.0
10.0
LOAD CURRENT (A)
SWITCHING FREQUENCY
vs. INPUT VOLTAGE (CIRCUIT OF FIGURE 3)
320
300
280
260
240
220
200
6 8 10 12 14 16 18 20 22 24 26 28
INPUT VOLTAGE (V)
EFFICIENCY vs. LOAD CURRENT
(CIRCUIT OF FIGURE 1)
100
VOUT = 2.5V
90
80
VOUT = 1.8V
70
60
50
40
30
0.1
1.0
10.0
LOAD CURRENT (A)
100.0
FREQUENCY vs. TEMPERATURE
220
210
200
190
180
170
160
-40 -15 10
35
60
85
TEMPERATURE (°C)
SWITCHING FREQUENCY vs.
OUTPUT CURRENT (CIRCUIT OF FIGURE 2)
650
600
550
500
450
400
-8 -6 -4 -2 0 2 4 6 8
OUTPUT CURRENT (A)
MAX8554 SHUTDOWN SUPPLY CURRENT
vs. INPUT VOLTAGE
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
V+ = HSD, EN = GND
0
4 8 12 16 20 24 28
INPUT VOLTAGE (V)
MAX8553 SHUTDOWN SUPPLY CURRENT
vs. INPUT VOLTAGE
5.0
1.86
LOAD REGULATION
(CIRCUIT OF FIGURE 1)
LOAD REGULATION
(CIRCUIT OF FIGURE 2)
1.31
4.5
4.0
1.84
1.29
3.5
1.82
3.0
VTT CONNECTED
1.27
TO THE OUTPUT
2.5
1.80
1.25
2.0
1.5
1.78
1.23
1.0
1.76
0.5
VTT CONNECTED AS
1.21
SHOWN IN FIGURE 2
EN = GND
0
1.74
1.19
4
8 12 16 20 24 28
0
4.0 8.0 12.0 16.0 20.0
0
2
4
6
8
INPUT VOLTAGE (V)
LOAD CURRENT (A)
LOAD CURRENT (A)
8 _______________________________________________________________________________________
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