Typical operating characteristics – Rainbow Electronics MAX15022 User Manual
Page 5
MAX15022
Dual, 4A/2A, 4MHz, Step-Down DC-DC
Regulator with Dual LDO Controllers
_______________________________________________________________________________________
5
Typical Operating Characteristics
(V
AVIN
= V
DVDD1
= V
DVDD2
= V
PVIN1
= V
PVIN2
= 5V, V
OUT1
= 3.3V, V
OUT2
= 1.5V, V
PGND_
= 0V, R
T
= 16.5k
Ω. T
A
= +25°C, unless
otherwise noted.)
CHANNEL 1 EFFICIENCY
vs. LOAD CURRENT
MAX15022 toc01
LOAD CURRENT (mA)
EFFICIENCY (%)
1000
10
20
30
40
50
60
70
80
90
100
0
100
5000
V
PVIN1
= 3.3V
V
PVIN1
= 5V
V
OUT1
= 1.8V
f
SW
= 2MHz
EN2 = 0V
CHANNEL 1 EFFICIENCY
vs. LOAD CURRENT
MAX15022 toc02
LOAD CURRENT (mA)
EFFICIENCY (%)
1000
10
20
30
40
50
60
70
80
90
100
0
100
5000
V
PVIN1
= 5V
f
SW
= 2MHz
EN2 = 0V
V
OUT1
= 3.3V
V
OUT1
= 1.8V
V
OUT1
= 1.0V
CHANNEL 2 EFFICIENCY
vs. LOAD CURRENT
MAX15022 toc03
LOAD CURRENT (mA)
EFFICIENCY (%)
1000
10
20
30
40
50
60
70
80
90
100
0
100
3000
P
VIN2
= 5V
P
VIN2
= 3.3V
V
OUT2
= 1.5V
f
SW
= 2MHz
EN1 = 0V
CHANNEL 2 EFFICIENCY
vs. LOAD CURRENT
MAX15022 toc04
LOAD CURRENT (mA)
EFFICIENCY (%)
1000
10
20
30
40
50
60
70
80
90
100
0
100
3000
V
OUT2
= 1.0V
V
OUT2
= 1.5V
V
OUT2
= 2.5V
V
PVIN2
= 5V
f
SW
= 2MHz
EN1 = 0V
CHANNEL 1
LOAD REGULATION
MAX15022 toc05
LOAD CURRENT (A)
V
OUT1
(V)
3.302
3.304
3.306
3.308
3.310
3.312
3.314
3.316
3.318
3.320
3.300
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
4.0
V
PVIN1
= 5V
f
SW
= 2MHz
CHANNEL 2
LOAD REGULATION
MAX15022 toc06
LOAD CURRENT (A)
V
OUT2
(V)
1.25
1.00
0.75
0.50
0.25
1.5025
1.5030
1.5035
1.5040
1.5045
1.5050
1.5055
1.5060
1.5065
1.5070
1.5020
0
1.50 1.75 2.00
f
SW
= 2MHz
V
PVIN2
= 5V
V
PVIN2
= 3.3V
SWITCHING FREQUENCY
vs. RT RESISTANCE
MAX15022 toc07
RT RESISTANCE (k
Ω)
SWITCHING FREQUENCY (MHz)
35
30
20
25
10
15
5
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0
0
SWITCHING FREQUENCY
vs. TEMPERATURE
MAX15022 toc08
TEMPERATURE (
°C)
CHANGE IN SWITCHING FREQUENCY (%)
110
95
65 80
-10 5
20 35 50
-25
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
-0.5
-40
125
f
SW
= 2MHz