Dual, 4A/2A, 4MHz, Step-Down DC-DC
Regulator with Dual LDO Controllers
Typical Operating Characteristics (continued)
(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 ? . T A = +25°C, unless
otherwise noted.)
5.00
4.75
QUIESCENT CURRENT
vs. TEMPERATURE
27
26
25
SWITCHING CURRENT
vs. TEMPERATURE
4.50
4.25
4.00
3.75
3.50
3.25
3.00
24
23
22
21
20
19
18
17
16
15
REGULATOR 1 ENABLED
V OUT1 = 3.3V
REGULATOR 2 ENABLED
V OUT2 = 1.5V
2.75
NO SWITCHING
14
13
2.50
1.030
1.025
1.020
1.015
1.010
1.005
1.000
0.995
0.990
0.985
0.980
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE ( ° C)
NORMALIZED UNDERVOLTAGE LOCKOUT
THRESHOLD vs. TEMPERATURE
12
1.260
1.255
1.250
1.245
1.240
1.235
1.230
1.225
1.220
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE ( ° C)
EN_ THRESHOLD
vs. TEMPERATURE
0.975
V UVLO (NOM) = 2.2V
1.215
0.970
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE ( ° C)
COINCIDENT TRACKING SOFT-START
MAX15022 toc13
V AVIN
5V/div
0V
V OUT1
1V/div
1.210
V OUT1
EN1
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE ( ° C)
COINCIDENT TRACKING SOFT-STOP
MAX15022 toc14
V AVIN
5V/div
0V
1ms/div
V OUT2
1V/div
0V
V OUT2
400 μ s/div
1V/div
0V
6
_______________________________________________________________________________________
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