MAX15022_11 Datasheet, PDF (5/28 Pages) Maxim Integrated Products – Dual, 4A/2A, 4MHz, Step-Down DC-DC Regulator with Dual LDO Controllers

Dual, 4A/2A, 4MHz, Step-Down DC-DC
Regulator with Dual LDO Controllers
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 = 16.5kΩ. T_A = +25°C, unless
otherwise noted.)
100
90
80
70
60
50
40
30
20
10
0
100
CHANNEL 1 EFFICIENCY
vs. LOAD CURRENT
VPVIN1 = 3.3V
VPVIN1 = 5V
VOUT1 = 1.8V
fSW = 2MHz
EN2 = 0V
1000
5000
LOAD CURRENT (mA)
CHANNEL 1 EFFICIENCY
vs. LOAD CURRENT
100
90
80
70
VOUT1 = 1.0V
60
VOUT1 = 1.8V
50
40
VOUT1 = 3.3V
30
20
10
0
100
VPVIN1 = 5V
fSW = 2MHz
EN2 = 0V
1000
5000
LOAD CURRENT (mA)
100
90
80
70
60
50
40
30
20
10
0
100
CHANNEL 2 EFFICIENCY
vs. LOAD CURRENT
PVIN2 = 3.3V
PVIN2 = 5V
VOUT2 = 1.5V
fSW = 2MHz
EN1 = 0V
1000
3000
LOAD CURRENT (mA)
CHANNEL 2 EFFICIENCY
vs. LOAD CURRENT
100
90
80
70
VOUT2 = 2.5V
60
VOUT2 = 1.5V
50 ^{VOUT2 = 1.0V}
40
30
20
10
0
100
VPVIN2 = 5V
fSW = 2MHz
EN1 = 0V
1000
3000
LOAD CURRENT (mA)
3.320
3.318
3.316
3.314
3.312
3.310
3.308
3.306
3.304
3.302
3.300
0
CHANNEL 1
LOAD REGULATION
VPVIN1 = 5V
fSW = 2MHz
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
LOAD CURRENT (A)
1.5070
1.5065
1.5060
1.5055
1.5050
1.5045
1.5040
1.5035
1.5030
1.5025
1.5020
0
CHANNEL 2
LOAD REGULATION
VPVIN2 = 5V
VPVIN2 = 3.3V
fSW = 2MHz
0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
LOAD CURRENT (A)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
SWITCHING FREQUENCY
vs. RT RESISTANCE
5 10 15 20 25 30 35
RT RESISTANCE (kΩ)
SWITCHING FREQUENCY
vs. TEMPERATURE
0.5
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
fSW = 2MHz
-0.5
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
_______________________________________________________________________________________ 5