Rainbow-electronics MAX684 Manual do Utilizador Página 4

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MAX682/MAX683/MAX684
3.3V-Input to Regulated 5V-Output
Charge Pumps
4 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(Circuit of Figure 5, V
IN
= 3.3V, component values from Tables 2 and 3, T
A
= +25°C, unless otherwise noted.)
100
0
1 10 100 1000
MAX682 EFFICIENCY
vs. LOAD CURRENT (SKIP = HIGH)
20
10
MAX682 TOC13
LOAD CURRENT (mA)
EFFICIENCY (%)
50
70
60
40
30
80
90
V
IN
= 5.0V
V
IN
= 3.3V
V
IN
= 3.0V
I
SHDN
= 22µA
100
0
1 10 100 1000
MAX683 EFFICIENCY
vs. LOAD CURRENT (SKIP = HIGH)
20
10
MAX682 TOC14
LOAD CURRENT (mA)
EFFICIENCY (%)
50
70
60
40
30
80
90
V
IN
= 5.0V
V
IN
= 3.3V
V
IN
= 3.0V
I
SHDN
= 22µA
90
0
1 10 100
MAX684 EFFICIENCY
vs. LOAD CURRENT (SKIP = HIGH)
20
10
MAX682 TOC15
LOAD CURRENT (mA)
EFFICIENCY (%)
40
30
50
60
70
80
V
IN
= 3.0V
V
IN
= 3.3V
V
IN
= 5.0V
I
SHDN
= 22µA
200ns/div
OUTPUT WAVEFORM
(SKIP = HIGH)
MAX682 TOC16
50mV/div
SKIP = HIGH, I
SHDN
= 22µA, I
LOAD
= 250mA, MAX682
100
0
0.1 1 10 100 1000
MAX682 EFFICIENCY
vs. LOAD CURRENT (SKIP = LOW)
20
10
MAX682 TOC10
LOAD CURRENT (mA)
EFFICIENCY (%)
50
70
60
40
30
80
90
V
IN
= 3.6V
V
IN
= 3.3V
V
IN
= 3.0V
100
0
0.1 1 10 100 1000
MAX683 EFFICIENCY
vs. LOAD CURRENT (SKIP = LOW)
20
10
MAX682 TOC11
LOAD CURRENT (mA)
EFFICIENCY (%)
50
70
60
40
30
80
90
V
IN
= 3.6V
V
IN
= 3.3V
V
IN
= 3.0V
100
0
0.1 1 10 100
MAX684 EFFICIENCY
vs. LOAD CURRENT (SKIP = LOW)
20
10
MAX682 TOC12
LOAD CURRENT (mA)
EFFICIENCY (%)
50
70
60
40
30
80
90
V
IN
= 3.6V
V
IN
= 3.3V
V
IN
= 3.0V
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