MAX15046_10 Datasheet, PDF (5/24 Pages) Maxim Integrated Products – 40V, High-Performance, Synchronous Buck Controller

40V, High-Performance Synchronous
Buck Controller
(VIN = 24V, TA = +25NC, unless otherwise noted.)
Typical Operating Characteristics
100
90
80
70
60
50
40
30
20
10
0
0
EFFICIENCY vs. LOAD CURRENT
(VIN = 24V)
VOUT = 3.3V _{VOUT = 1.8V}
VOUT = 5V
VOUT = 1.2V
3
6
9
12
15
LOAD CURRENT (A)
VCC vs. LOAD CURRENT
5.256
5.254
5.252
5.250
5.248
5.246
5.244
5.242
0
5 10 15 20 25 30 35 40 45
LOAD CURRENT (mA)
1000
900
800
700
600
500
400
300
200
100
0
0
SWITCHING FREQUENCY
vs. RRT
40
80
120
160
RRT (kI)
100
90
80
70
60
50
40
30
20
10
0
0
EFFICIENCY vs. LOAD CURRENT
(VIN = 12V)
VOUT = 1.8V
VOUT = 1.2V
V_OUT = 3.3V ^{VOUT = 5V}
3
6
9
12
15
LOAD CURRENT (A)
VCC LINE REGULATION
5.2
5.0
IVCC = 5mA, 10mA, 20mA, 30mA
4.8
4.6
4.4
IVCC = 40mA
4.2
4.0
0
5 10 15 20 25 30 35 40
VIN (V)
SWITCHING FREQUENCY
vs. TEMPERATURE
1200
1000
RT = 14.3kI
800
RT = 25.5kI
600
400
RT = 49.9kI
200
RT = 150kI
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (NC)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
0
VOUT vs. LOAD CURRENT
2 4 6 8 10 12
LOAD CURRENT (A)
VCC vs. TEMPERATURE
5.266
ILOAD = 5mA
5.265
5.264
5.263
5.262
5.261
5.260
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (NC)
IIN vs.
SWITCHING FREQUENCY
2.8
CDH = CDL = 0
2.7
2.6
2.5
2.4
2.3
2.2
100
1000
FREQUENCY (kHz)
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