Switched-Capacitor Voltage Converters
MAX1044/ICL7660
____________________________Typical Operating Characteristics (continued)
(V+ = 5V; C
BYPASS
= 0.1µF; C1 = C2 = 10µF; LV = open; OSC = open; T
A
= +25°C; unless otherwise noted.)
OSCILLATOR FREQUENCY
vs. TEMPERATURE
MAX1044-Fig 10
QUIESCENT CURRENT
vs. OSCILLATOR FREQUENCY
MAX1044-Fig 11
100
OSCILLATOR FREQUENCY (kHz)
A: MAX1044 with
BOOST = V+
B: ICL7600
C: MAX1044 with
BOOST = OPEN
10,000
QUIESCENT CURRENT (µA)
80
A
60
1000
100
40
USING
EXTERNAL
CAPACITOR
USING
EXTERNAL
HCMOS
OSCILLATOR
10
1
10
2
10
3
10
4
10
5
5x10
5
20
C
0
-50
B
-25
0
25
50
75
100 125
10
1
10
0
TEMPERATURE (°C)
OSCILLATOR FREQUENCY (Hz)
QUIESCENT CURRENT
vs. SUPPLY VOLTAGE
MAX1044-Fig 12
QUIESCENT CURRENT
vs. TEMPERATURE
400
QUIESCENT CURRENT (µA)
MAX1044-Fig 13
2000
1000
QUIESCENT CURRENT (µA)
A
B
C
D
500
100
300
MAX1044 with
BOOST = V+
10
A: MAX1044, BOOST = V+, LV = GND
B: MAX1044, BOOST = V+, LV = OPEN
C: ICL7660 and MAX1044 with
BOOST = OPEN, LV = GND;
ABOVE 5V, MAX1044 ONLY
D: ICL7660 and MAX1044 with
BOOST = OPEN, LV = OPEN
200
1
100
ICL7660, MAX1044 with BOOST = OPEN
0.1
1
2
0
-50
-25
0
25
50
75
100 125
TEMPERATURE (°C)
3
4
5
6
7
8
9
10
SUPPLY VOLTAGE (V)
OUTPUT RESISTANCE
vs. OSCILLATOR FREQUENCY
MAX1044-Fig 14
OUTPUT RESISTANCE
vs. SUPPLY VOLTAGE
MAX1044-Fig 15
OUTPUT RESISTANCE
vs. TEMPERATURE
MAX1044-Fig 16
1000
900
800
RESISTANCE (Ω)
700
C1, C2 = 100µF
EXTERNAL
HCMOS
OSCILLATOR
200
180
OUTPUT RESISTANCE (Ω)
160
140
120
100
80
60
40
20
0
80
70
60
50
40
30
20
-60 -40 -20 0
MAX1044 with
BOOST = V+
ICL7660,
MAX1044 with
BOOST = OPEN
600
500
400
300
200
100
0
10
1
10
2
10
3
FREQUENCY (Hz)
10
4
10
5
1
2
3
4
5
6
7
8
9
10
OUTPUT RESISTANCE (Ω)
C1, C2 = 10µF
C1, C2 = 1µF
20 40 60 80 100 120 140
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
4
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
