MAX8543 MAXIM [Maxim Integrated Products], MAX8543 Datasheet - Page 7

• Manufacturer Part Number: MAX8543
• Description: Step-Down Controllers with Prebias Startup, Lossless Sensing, Synchronization, and OVP
• Manufacturer: MAXIM [Maxim Integrated Products]

(T
A
2.510
2.508
2.506
2.504
2.502
2.500
2.498
2.496
2.494
2.492
2.490
= +25°C, unless otherwise noted.)
100
90
80
70
60
50
40
30
20
10
0
10.8
0.1
Lossless Sensing, Synchronization, and OVP
V
Step-Down Controllers with Prebias Startup,
LINE REGULATION WITH 12V INPUT
OUT
EFFICIENCY vs. LOAD CURRENT
= 3.3V
11.4
AND 2.5V OUTPUT
15A LOAD
NO LOAD
WITH 12V INPUT
INPUT VOLTAGE (V)
LOAD CURRENT (A)
1
V
_______________________________________________________________________________________
OUT
12.0
= 1.8V
V
OUT
= 2.5V
10
12.6
f
S
= 600kHz
13.2
100
2.54
2.52
2.50
2.48
2.46
2.44
2.42
100
700
680
660
640
620
600
580
560
540
520
500
90
80
70
60
50
40
30
20
10
0
0.1
3.0
5.5
EFFICIENCY vs. LOAD CURRENT
3.1
NO LOAD
15A LOAD
f
T
S
OSCILLATOR FREQUENCY
A
15A LOAD
f
= 350kHz
S
= -40°C
7.5
3.0V TO 3.6V INPUT
= 500kHz
vs. INPUT VOLTAGE
LINE REGULATION
WITH 3.3V INPUT
V
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
LOAD CURRENT (A)
3.2
OUT
1
V
OUT
= 1.5V
V
OUT
= 1.8V
3.3
9.5
= 2.5V
Typical Operating Characteristics
T
A
T
= +25°C
A
3.4
10
= +85°C
11.5
R6 = 42.2kΩ
f
S
= 500kHz
3.5
13.5
100
3.6
2.55
2.54
2.53
2.52
2.51
2.50
2.49
2.48
2.47
2.46
2.45
600
580
560
540
520
500
480
460
440
420
400
3.0
0
LOAD REGULATION WITH 12V INPUT
3.5
OSCILLATOR FREQUENCY
3
T
vs. INPUT VOLTAGE
A
= -40°C
INPUT VOLTAGE (V)
LOAD CURRENT (A)
4.0
6
4.5
T
9
A
T
= +85°C
A
= +25°C
R6 = 53.6kΩ
5.0
12
5.5
15
7