Triple-Output Power-Management IC for
Microprocessor-Based Systems
Typical Operating Characteristics
(Circuit of Figure 1, T A = +25 ° C, unless otherwise noted.)
100
REG1 EFFICIENCY
vs. LOAD CURRENT
100
REG3 INCREMENTAL EFFICIENCY
vs. LOAD CURRENT
100
REG2 INCREMENTAL EFFICIENCY
vs. LOAD CURRENT
90
80
90
80
V OUT3 = 3.3V
90
80
V OUT2 = 1.3V
V OUT2 = 1.1V
70
60
70
60
V OUT3 = 1.8V
V OUT3 = 2.5V
70
60
V OUT2 = 1V
50
50
50
40
30
20
10
0
40
30
20
10
0
NOTE: INCREMENTAL EFFICIENCY
IS REG3 OUTPUT POWER OVER
ADDITIONAL INPUT POWER.
REG1 AND REG3 QUIESCENT
CURRENT IS REFLECTED IN
REG1 ’ S EFFICIENCY GRAPH.
40
30
20
10
0
NOTE: INCREMENTAL EFFICIENCY
IS REG2 OUTPUT POWER OVER
ADDITIONAL INPUT POWER.
REG1 AND REG3 QUIESCENT
CURRENT IS REFLECTED IN
REG1 ’ S EFFICIENCY GRAPH.
1
10
100
1000
1
10
100
1000
1
10
100
1000
0.7
LOAD CURRENT (mA)
NO LOAD QUIESECNT CURRENT
vs. SUPPLY VOLTAGE
350
LOAD CURRENT (mA)
REG1 DROPOUT VOLTAGE
vs. LOAD CURRENT (V IN = 3.3V)
160
LOAD CURRENT (mA)
REG3 DROPOUT VOLTAGE
vs. LOAD CURRENT (V IN = 3.3V)
0.6
0.5
300
250
140
120
V OUT3 = 3.3V
100
0.4
0.3
200
150
80
60
0.2
0.1
0
100
50
0
40
20
0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
0 100 200 300 400 500 600 700 800 900 1000
0
50 100 150 200 250 300 350 400 450
3.33
SUPPLY VOLTAGE (V)
REG1 OUTPUT VOLTAGE
vs. LOAD CURRENT
1.107
LOAD CURRENT (mA)
REG2 OUTPUT VOLTAGE
vs. LOAD CURRENT
3.325
LOAD CURRENT (mA)
REG3 OUTPUT VOLTAGE
vs. LOAD CURRENT (V OUT3 = 3.3V)
3.31
T A = +85°C
3.315
3.29
1.105
1.103
T A = +40 ° C
T A = +85 ° C
3.305
T A = +85 ° C
3.27
T A = -40°C
T A = 0 ° C
T A = +40°C
1.101
3.295
3.25
3.23
1.099
1.097
T A = -40 ° C
T A = 0 ° C
3.285
3.275
T A = -40 ° C
T A = 0 ° C
T A = +40 ° C
3.21
1.095
3.265
0
100
200
300
400
500
600
700
0
50
100
150
200
250
300
0
50 100 150 200 250 300 350 400 450
LOAD CURRENT (mA)
LOAD CURRENT (mA)
LOAD CURRENT (mA)
6
_______________________________________________________________________________________
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