Rainbow Electronics MAX15022 - 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