MAX15026_12 Datasheet, PDF (5/23 Pages) Maxim Integrated Products – Low-Cost, Small, 4.5V to 28V Wide Operating Range, DC-DC Synchronous Buck Controller

Low-Cost, Small, 4.5V to 28V Wide Operating
Range, DC-DC Synchronous Buck Controller
Typical Operating Characteristics
(V_IN = 12V, T_A = +25°C. The following TOCs are for MAX15026B/C/D, unless otherwise noted.) (See the circuit of Figure 5.)
EFFICIENCY vs. LOAD CURRENT
(MAX15026B/C)
100
90
80
70
60
V_OUT = 3.3V
50
V_OUT = 1.2V
V_OUT = 5V
40
30
V_OUT = 1.8V
20
10
0
0
2
46
8 10 12
LOAD CURRENT (A)
100
90
80
70
60
50
40
30
20
10
0
0
EFFICIENCY vs. LOAD CURRENT
(V_IN = 12V, V_CC = V_DRV = 5V)
V_OUT = 5V
V_OUT = 3.3V
V_OUT = 1.8V
V_OUT = 1.2V
2
4
6
8 10 12
LOAD CURRENT (A)
0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-0.8
-0.9
-1.0
0
V_OUT vs. LOAD CURRENT
2
4
6
8 10 12
LOAD CURRENT (A)
5.265
5.260
5.255
5.250
5.245
5.240
5.235
5.230
5.225
0
2500
V_CC vs. LOAD CURRENT
20
40
60
80
100
LOAD CURRENT (mA)
SWITCHING FREQUENCY
vs. RESISTANCE
2000
1500
1000
500
0
0
20
40
60
80 100
RESISTANCE (kΩ)
5.3
5mA
5.2
V_CC LINE REGULATION
5.1
5.0
50mA
4.9
4.8
4.7
4.6
4.5
4.4
4.3
0
5 10 15 20 25 30
V_IN (V)
SWITCHING FREQUENCY
vs. TEMPERATURE
2500
2000
R_RT = 7.2kΩ
1500
R_RT = 15.7kΩ
R_RT = 27kΩ
R_RT = 85kΩ
1000
500
0
-40 -15
10
35
60
85
TEMPERATURE (°C)
V_CC vs. TEMPERATURE
5.248
5.246
5.244
5.242
5.240
5.238
5.236
-40 -15
10
35
60
85
TEMPERATURE (°C)
90
80
70
60
50
40
30
20
10
0
100
SUPPLY CURRENT
vs. SWITCHING FREQUENCY
1000
SWITCHING FREQUENCY (kHz)
10,000
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