MAX856C Просмотр технического описания (PDF) - Maxim Integrated
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MAX856C Datasheet PDF : 12 Pages
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3.3V/5V or Adjustable-Output,
Step-Up DC-DC Converters
_____________________________Typical Operating Characteristics (continued)
(Circuits of Figure 2, TA = +25°C, unless otherwise noted.)
REFERENCE VOLTAGE vs. CURRENT
10
9
8
7
6
5
4
3
2
1
0
0
50 100 150 200 250
REFERENCE LOAD CURRENT (µA)
QUIESCENT CURRENT
vs. INPUT VOLTAGE
1.6
SEE NOTE 2
1.4
IN THE ELECTRICAL
CHARACTERISTICS
1.2
1.0
0.8
MAX856/MAX857
NO LOAD BATTERY CURRENT
vs. INPUT VOLTAGE
400
350 TA = +85°C
INCLUDES ALL EXTERNAL
300
COMPONENT LEAKAGES.
CAPACITOR LEAKAGE
250
DOMINATES AT TA = +85°C.
CAPS ARE SPRAGUE 595 D
200
TA = +25°C
150
100
50 TA = -40°C
0
1.5 2.0
2.5 3.0
3.5 4.0
INPUT VOLTAGE (V)
MAX856/MAX857
MINIMUM START-UP INPUT VOLTAGE
vs. LOAD CURRENT
1.15
VOUT = 5V
1.10
1.05
1.00
VOUT = 3.3V
0.95
MAX858/MAX859
NO LOAD BATTERY CURRENT
vs. INPUT VOLTAGE
1.6
1.4 TA = +85°C
1.2
INCLUDES ALL EXTERNAL
COMPONENT LEAKAGES.
1.0
CAPACITOR LEAKAGE
DOMINATES AT TA = +85°C.
0.8
CAPS ARE SPRAGUE 595D
0.6
0.4 TA = +25°C
0.2
TA = -40°C
0
1.5 2.0 2.5 3.0 3.5 4.0
INPUT VOLTAGE (V)
MAX858/MAX859
MINIMUM START-UP INPUT VOLTAGE
vs. LOAD CURRENT
1.4
1.3
1.2
VOUT = 5V
1.1
0.6
0.4
0.2
0 TA = -40°C
1.5 2.0 2.5
TA = +85°C
3.0 3.5 4.0
INPUT VOLTAGE (V)
0.90
0.85
0.80
0.75
0.1
1
10
100
LOAD CURRENT (mA)
1.0
0.9
0.8
0.1
1
10
100
LOAD CURRENT (mA)
SHUTDOWN CURRENT
vs. INPUT VOLTAGE
1.0
0.9
0.8
0.7
0.6
0.5
TA = +85°C
0.4
TA = +25°C
0.3
0.2
0.1
TA = -40°C
0
1.5 2.0 2.5 3.0 3.5 4.0
INPUT VOLTAGE (V)
MAX856/MAX857
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
400
350
300
250
VOUT = 3.3V
200
150
VOUT = 5.0V
100
50
0
1.0
1.5 2.0 2.5 3.0
INPUT VOLTAGE (V)
3.5 4.0
MAX858/MAX859
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
100
90
80
70 VOUT = 3.3V
60
50
VOUT = 5.0V
40
30
20
10
0
1.0 1.5 2.0 2.5 3.0 3.5 4.0
INPUT VOLTAGE (V)
4 _______________________________________________________________________________________
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