MAX5025–MAX5028
500kHz, 36V Output, SOT23,
Step-Up DC-DC Converters
4 _______________________________________________________________________________________
0
20
10
40
30
50
60
80
70
90
0246810
MAX5025-28 toc01
LOAD CURRENT (mA)
EFFICIENCY (%)
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 12V)
MAX5026
V
CC
= 5V,
V
OUT
= 12V
CIRCUIT OF FIGURE 2.
R1 = 147kΩ, R2 = 16.2kΩ
0
20
10
50
40
30
80
70
60
90
04268
MAX5025-28 toc02
LOAD CURRENT (mA)
EFFICIENCY (%)
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 15V)
MAX5026
V
CC
= 5V,
V
OUT
= 12V
CIRCUIT OF FIGURE 2.
R1 = 147kΩ, R2 = 13kΩ
0
20
10
30
60
70
50
40
80
012345
MAX5025-28 toc03
LOAD CURRENT (mA)
EFFICIENCY (%)
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 24V)
MAX5026
V
CC
= 5V,
V
OUT
= 24V
CIRCUIT OF FIGURE 2.
R1 = 147kΩ, R2 = 8.07kΩ
0
10
30
20
50
60
40
70
01234
MAX5025-28 toc04
LOAD CURRENT (mA)
EFFICIENCY (%)
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 30V)
MAX5026
V
CC
= 5V,
V
OUT
= 30V
CIRCUIT OF FIGURE 2.
R1 = 147kΩ, R2 = 6.34kΩ
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
01234
MAX5025-28 toc05
LOAD CURRENT (mA)
STARTUP VOLTAGE (V)
MAX5026 MINIMUM STARTUP VOLTAGE
vs. LOAD CURRENT
0
150
100
50
200
250
300
350
400
450
500
036912
MAX5025-28 toc06
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (μA)
MAX5026/MAX5028
SUPPLY CURRENT vs. SUPPLY VOLTAGE
CURRENT INTO V
CC
PIN
DEVICE NOT SWITCHING
0
2
4
6
8
10
12
14
16
357911
MAX5025-28 toc07
SUPPLY VOLTAGE (V)
NO LOAD SUPPLY CURRENT (mA)
MAX5026
NO LOAD SUPPLY CURRENT
vs. SUPPLY VOLTAGE
CIRCUIT OF FIGURE 2
V
OUT
= 30V
150
350
250
550
450
750
650
850
-40 0 20-20 40 60 80
SUPPLY CURRENT vs. TEMPERATURE
MAX5025-28 toc08
TEMPERATURE (°C)
SUPPLY CURRENT (μA)
CURRENT INTO V
CC
PIN
V
CC
= 11V
V
CC
= 9V
V
CC
= 7V
V
CC
= 5V
V
CC
= 3V
200
300
250
450
400
350
600
550
500
650
-40 0 20-20 40 60 80
MAX5025-28 toc09
TEMPERATURE (°C)
SWITCHING FREQUENCY (kHz)
MAX5026
SWITCHING FREQUENCY vs. TEMPERATURE
V
CC
= 5V
V
OUT
= 30V
CIRCUIT OF FIGURE 2.
Typical Operating Characteristics
(V
CC
= 5V, V
OUT
= 30V, T
A
= +25°C, unless otherwise noted.)
