Typical operating characteristics – Rainbow Electronics MAX8548 User Manual
Page 4
MAX8545/MAX8546/MAX8548
Low-Cost, Wide Input Range, Step-Down
Controllers with Foldback Current Limit
4
_______________________________________________________________________________________
Typical Operating Characteristics
(V
IN
= V
L
= V
CC
= 5V, typical values are at T
A
= +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
MAX8545/46/48 toc01
LOAD CURRENT (A)
(CIRCUIT OF FIGURE 1; TABLE 1a)
EFFICIENCY (%)
1
0.1
10
20
30
40
50
60
70
80
90
100
0
0.01
10
V
IN
= 3.3V
V
OUT
= 1.2V
EFFICIENCY vs. LOAD CURRENT
MAX8545/46/48 toc02
LOAD CURRENT (A)
(CIRCUIT OF FIGURE 1; TABLE 1a)
EFFICIENCY (%)
1
0.1
10
20
30
40
50
60
70
80
90
100
0
0.01
10
V
IN
= 5V
V
OUT
= 1.8V
V
OUT
= 3.3V
EFFICIENCY vs. LOAD CURRENT
MAX8545/46/48 toc03
LOAD CURRENT (A)
(CIRCUIT OF FIGURE 2; TABLE 2a)
EFFICIENCY (%)
1
0.1
10
20
30
40
50
60
70
80
90
100
0
0.01
10
V
OUT
= 1.8V
V
OUT
= 3.3V
V
IN
= 12V
EFFICIENCY vs. LOAD CURRENT
MAX8545/46/48 toc04
LOAD CURRENT (A)
(CIRCUIT OF FIGURE 2; TABLE 2a)
EFFICIENCY (%)
1
0.1
10
20
30
40
50
60
70
80
90
100
0
0.01
10
V
IN
= 17V
V
OUT
= 3.3V
V
OUT
= 1.8V
EFFICIENCY vs. LOAD CURRENT
MAX8545/46/48 toc05
LOAD CURRENT (A)
EFFICIENCY (%)
1
0.1
10
20
30
40
50
60
70
80
90
100
0
0.01
10
V
OUT
= 1.8V
V
OUT
= 1.2V
V
IN
= 3.3V
(CIRCUIT OF FIGURE 1; TABLE 1b)
EFFICIENCY vs. LOAD CURRENT
MAX8545/46/48 toc06
LOAD CURRENT (A)
EFFICIENCY (%)
1
0.1
10
20
30
40
50
60
70
80
90
100
0
0.01
10
V
OUT
= 3.3V
V
OUT
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.2V
V
IN
= 5V
(CIRCUIT OF FIGURE 1; TABLE 1b)
EFFICIENCY vs. LOAD CURRENT
MAX8545/46/48 toc07
LOAD CURRENT (A)
EFFICIENCY (%)
1
0.1
10
20
30
40
50
60
70
80
90
100
0
0.01
10
V
OUT
= 3.3V
V
OUT
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.2V
V
IN
= 12V
(CIRCUIT OF FIGURE 2; TABLE 2b)
EFFICIENCY vs. LOAD CURRENT
MAX8545/46/48 toc08
LOAD CURRENT (A)
EFFICIENCY (%)
1
0.1
10
20
30
40
50
60
70
80
90
100
0
0.01
10
V
OUT
= 3.3V
V
OUT
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.2V
V
IN
= 17V
(CIRCUIT OF FIGURE 2; TABLE 2b)
CHANGE IN OUTPUT VOLTAGE
vs. LOAD CURRENT
MAX8545/46/48 toc09
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
5
4
3
2
2.485
2.490
2.495
2.500
2.505
2.510
2.515
2.520
2.480
1
6
V
OUT
= 2.5V
V
IN
= 12V