MAX15023ETG-T Datasheet, PDF (5/28 Pages) Maxim Integrated Products – Wide 4.5V to 28V Input, Dual-Output Synchronous Buck Controller

MAX15023
Wide 4.5V to 28V Input, Dual-Output
Synchronous Buck Controller
Typical Operating Characteristics
(Supply = IN = 12V, unless otherwise noted. See Typical Application Circuit of Figure 6.)
95
90
85
80
75
70
65
60
55
50
45
40
35
30
0.1
EFFICIENCY
vs. LOAD CURRENT
VOUT1 = 3.3V
VOUT1 = 1.2V
VIN = 12V
1
10
100
LOAD CURRENT (A)
VCC VOLTAGE
vs. LOAD CURRENT
5.40
5.35
5.30
5.25
5.20
5.15
5.10
5.05
5.00
0 15 30 45 60 75 90 105 120 135 150
LOAD CURRENT (mA)
SWITCHING FREQUENCY
vs. RT
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
10 20 30 40 50 60 70 80 90
RT (kΩ)
Maxim Integrated
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
0.1
EFFICIENCY
vs. LOAD CURRENT
VOUT1 = 3.3V
VOUT1 = 1.2V
VIN = VCC = 5V
1
10
100
LOAD CURRENT (A)
5.50
5.35
5.20
5.05
4.90
4.75
4.60
4.45
4.30
4.15
4.00
4
VCC VOLTAGE
vs. IN VOLTAGE
ILOAD = 5mA
ILOAD = 50mA
8 12 16 20 24 28
IN VOLTAGE (V)
SWITCHING FREQUENCY
vs. TEMPERATURE
800
750
RT = 22.1kΩ
700
650
600
550
RT = 33.2kΩ
500
450
400
350
300 _{RT = 66.5kΩ}
250
200
-40 -15
10
35
60
85
TEMPERATURE (°C)
101.0
100.8
100.6
100.4
100.2
100.0
99.8
99.6
99.4
99.2
99.0
0
OUTPUT VOLTAGE CHANGE
vs. LOAD CURRENT
OUT1
2 4 6 8 10 12
LOAD CURRENT (A)
VCC VOLTAGE
vs. TEMPERATURE
5.50
ILOAD = 5mA
5.45
5.40
5.35
5.30
5.25
5.20
5.15
5.10
5.05
5.00
-40 -15
10
35
30
85
TEMPERATURE (°C)
IIN CURRENT
vs. SWITCHING FREQUENCY
210
VIN = 12V
180
150
CDL = CDH = 10nF
120
CDL = CDH = 4.7nF
90
60
CDL = CDH = 1nF
30
CDL = CDH = 0nF
0
200 300 400 500 600 700 800 900 1000
SWITCHING FREQUENCY (kHz)
5