MAX8743(2004) 데이터 시트보기 (PDF) - Maxim Integrated
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MAX8743
(Rev.:2004)
(Rev.:2004)
Maxim Integrated
MAX8743 Datasheet PDF : 27 Pages
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Dual, High-Efficiency, Step-Down
Controller with High Impedance in Shutdown
Typical Operating Characteristics (continued)
(Circuit of Figure 1, components from Table 1, VIN = 15V, SKIP = GND, TON = unconnected, TA = +25°C, unless otherwise noted.)
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE (SKIP = VCC)
15.0
13.5
12.0
IDD
10.5
9.0
7.5 VCC = VDD = 5V
6.0
4.5
ICC
I+ (25µA TYP)
3.0
1.5
0
5
10
15
20
25
30
INPUT VOLTAGE V+ (V)
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE (SKIP = GND)
1100
1000 VCC = VDD = 5V
900
800
ICC
700
600
500
400
300
200
IDD (600nA TYP)
I+
100
0
5
10
15
20
25
30
INPUT VOLTAGE V+ (V)
EFFICIENCY vs. LOAD CURRENT
(8A COMPONENTS, SKIP = VCC)
100
90
V+ = 7V
80
V+ = 20V
70
60
50
V+ = 12V
40
30
20
10
0.01
OUT1 = 1.8V
0.1
1
10
LOAD CURRENT (A)
EFFICIENCY vs. LOAD CURRENT
(8A COMPONENTS, SKIP = GND)
100
95
90
V+ = 7V
85
80
75
V+ = 12V
70
V+ = 20V
65
60
55
50
0.01
OUT1 = 1.8V
0.1
1
10
LOAD CURRENT (A)
EFFICIENCY vs. LOAD CURRENT
(4A COMPONENTS, SKIP = VCC)
100
90
V+ = 7V
80
V+ = 20V
70
60
50
V+ = 12V
40
30
20
10
0.01
OUT2 = 2.5V
0.1
1
10
LOAD CURRENT (A)
EFFICIENCY vs. LOAD CURRENT
(4A COMPONENTS, SKIP = GND)
100
95
90
85
80
75
0.01
V+ = 7V
V+ = 20V
V+ = 12V
OUT2 = 2.5V
0.1
1
10
LOAD CURRENT (A)
250
230
210
190
170
150
130
110
90
70
50
30
10
0
CURRENT-LIMIT TRIP POINT
vs. ILIM VOLTAGE
0.5 1.0 1.5 2.0 2.5
ILIM VOLTAGE (V)
NORMALIZED OVERVOLTAGE PROTECTION
THRESHOLD vs. OVP VOLTAGE
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8
OVP VOLTAGE (V)
LOAD-TRANSIENT RESPONSE
(4A COMPONENTS, PWM MODE, VOUT2 = 2.5V)
MAX8743 toc11
VOUT2
100mV/div
20µs/div
IOUT2
2A/div
_______________________________________________________________________________________ 7
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