3.3V-Input to Regulated 5V-Output
Charge Pumps
MAX682/MAX683/MAX684
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.)
MAX682 EFFICIENCY
vs. LOAD CURRENT (SKIP = LOW)
MAX682 TOC10
MAX683 EFFICIENCY
vs. LOAD CURRENT (SKIP = LOW)
MAX682 TOC11
MAX684 EFFICIENCY
vs. LOAD CURRENT (SKIP = LOW)
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
0
V
IN
= 3.3V
V
IN
= 3.6V
V
IN
= 3.0V
MAX682 TOC12
100
90
80
EFFICIENCY (%)
V
IN
= 3.0V
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
0
V
IN
= 3.3V
V
IN
= 3.6V
V
IN
= 3.0V
100
70
60
50
40
30
20
10
0
0.1
1
10
100
1000
LOAD CURRENT (mA)
V
IN
= 3.3V
V
IN
= 3.6V
0.1
1
10
100
1000
0.1
1
10
100
LOAD CURRENT (mA)
LOAD CURRENT (mA)
MAX682 EFFICIENCY
vs. LOAD CURRENT (SKIP = HIGH)
MAX682 TOC13
MAX683 EFFICIENCY
vs. LOAD CURRENT (SKIP = HIGH)
90
80
EFFICIENCY (%)
EFFICIENCY (%)
70
60
50
40
30
20
V
IN
= 5.0V
V
IN
= 3.3V
V
IN
= 3.0V
MAX682 TOC14
MAX684 EFFICIENCY
vs. LOAD CURRENT (SKIP = HIGH)
80
70
60
50
40
30
20
V
IN
= 5.0V
V
IN
= 3.0V
V
IN
= 3.3V
MAX682 TOC15
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
0
1
10
100
I
SHDN
= 22µA
V
IN
= 5.0V
V
IN
= 3.3V
V
IN
= 3.0V
100
90
10
0
1000
1
10
I
SHDN
= 22µA
100
1000
10
0
1
10
I
SHDN
= 22µA
100
LOAD CURRENT (mA)
LOAD CURRENT (mA)
LOAD CURRENT (mA)
OUTPUT WAVEFORM
(SKIP = HIGH)
MAX682 TOC16
OUTPUT WAVEFORM
(SKIP = LOW)
MAX682 TOC17
50mV/div
50mV/div
200ns/div
SKIP = HIGH, I
SHDN
= 22µA, I
LOAD
= 250mA, MAX682
200ns/div
SKIP = LOW, I
LOAD
= 250mA, MAX682
4
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
