MAX8554 MAXIM [Maxim Integrated Products], MAX8554 Datasheet - Page 8

• Manufacturer Part Number: MAX8554
• Description: 4.5V to 28V Input, Synchronous PWM Buck Controllers for DDR Termination and Point-of-Load Applications
• Manufacturer: MAXIM [Maxim Integrated Products]

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