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ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - voltage regulator - special purpose uMAX 10
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MAX1856
Wide Input Range, Synchronizable,
PWM SLIC Power Supply
_______________________________________________________________________________________ 5
-24.0
-23.8
-23.4
-23.6
-23.2
-23.0
0105152025
-24V OUTPUT VOLTAGE
vs. INPUT VOLTAGE
MAX1856 toc07
V
IN
(V)
V
OUT1
(V)
V
OUT1
= -24V
I
OUT1
= 100mA
V
OUT2
= -72V
I
OUT2
= 100mA
V
OUT1
= -24V
I
OUT1
= 50mA
V
OUT2
= -72V
I
OUT2
= 50mA
-73.0
-72.6
-71.8
-72.2
-71.4
-71.0
0105152025
-72V OUTPUT VOLTAGE
vs. INPUT VOLTAGE
MAX1856 toc08
V
IN
(V)
V
OUT1
(V)
V
OUT1
= -24V
I
OUT1
= 100mA
V
OUT2
= -72V
I
OUT2
= 100mA
V
OUT1
= -24V
I
OUT1
= 50mA
V
OUT2
= -72V
I
OUT2
= 50mA
50
60
70
80
90
100
0105152025
DUAL-OUTPUT EFFICIENCY
vs. INPUT VOLTAGE
MAX1856 toc09
V
IN
(V)
EFFICIENCY (%)
V
OUT1
= -24V
I
OUT1
= 100mA
V
OUT2
= -72V
I
OUT2
= 100mA
V
OUT1
= -24V
I
OUT1
= 50mA
V
OUT2
= -72V
I
OUT2
= 50mA
-48.5
-48.1
-47.7
-47.3
-46.9
-46.5
0 100 200 300 400
-48V OUTPUT VOLTAGE
vs. LOAD CURRENT
MAX1856 toc10
I
OUT2
(mA)
V
OUT2
(V)
V
OUT
= -48V
FIGURE 4
V
IN
= 5V
V
IN
= 24V
V
IN
= 12V
50
60
70
80
90
100
0 100 200 300 400
EFFICIENCY vs. LOAD CURRENT
(-48V OUTPUT)
MAX1856 toc11
I
OUT2
(mA)
EFFICIENCY (%)
V
OUT
= -48V
FIGURE 4
V
IN
= 5V
V
IN
= 24V
V
IN
= 12V
0
50
150
100
200
250
0105 15202530
SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX1856 toc12
INPUT VOLTAGE (V)
SUPPLY CURRENT (µA)
CURRENT INTO V
CC
PIN
R
OSC
= 500kΩ
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
CC
= V
SYNC/SHDN
= 12V, V
OUT1
= -24V, V
OUT2
= -72V, R
OSC
= 200kΩ, unless otherwise noted.)
-74
-73
-72
-71
-70
0 50 100 150 200 250
-72V OUTPUT VOLTAGE
vs. LOAD CURRENT
MAX1856 toc04
I
OUT2
(mA)
V
OUT2
(V)
V
OUT1
= -24V
V
OUT2
= -72V
I
OUT1
= 5mA
V
IN
= 5V
V
IN
= 24V
V
IN
= 12V
-24.0
-23.8
-23.4
-23.6
-23.2
-23.0
010050 150 200 250
-24V CROSS-REGULATION VOLTAGE
vs. LOAD CURRENT
MAX1856 toc05
I
OUT2
(mA)
V
OUT1
(V)
V
OUT1
= -24V
V
OUT2
= -72V
I
OUT1
= 5mA
V
IN
= 5V
V
IN
= 24V
V
IN
= 12V
50
60
70
80
90
100
010050 150 200 250
EFFICIENCY vs. LOAD CURRENT
(-72V OUTPUT)
MAX1856 toc06
I
OUT2
(mA)
EFFICIENCY (%)
V
OUT1
= -24V
V
OUT2
= -72V
I
OUT1
= 5mA
V
IN
= 5V
V
IN
= 24V
V
IN
= 12V