S w it c h e d -Ca p a c it o r Vo lt a g e Co n ve rt e rs
____________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )
(V+ = 5V; C
= 0.1µF; C1 = C2 = 10µF; LV = open; OSC = open; T = +25°C; unless otherwise noted.)
A
BYPASS
OSCILLATOR FREQUENCY
vs. TEMPERATURE
QUIESCENT CURRENT
vs. OSCILLATOR FREQUENCY
100
80
10,000
A: MAX1044 with
BOOST = V+
B: ICL7600
C: MAX1044 with
BOOST = OPEN
1000
100
10
A
60
40
USING
EXTERNAL
CAPACITOR
USING
20
EXTERNAL
HCMOS
OSCILLATOR
B
C
MAX14/ICL760
0
-50
1
10
0
1
2
3
4
5
10 5x10
5
-25
0
25
50 75 100 125
10
10
10
10
TEMPERATURE (°C)
OSCILLATOR FREQUENCY (Hz)
QUIESCENT CURRENT
vs. TEMPERATURE
QUIESCENT CURRENT
vs. SUPPLY VOLTAGE
500
400
2000
1000
A
B
MAX1044 with
BOOST = V+
300
200
100
10
C
D
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
100
0
1
ICL7660, MAX1044 with BOOST = OPEN
0.1
-50 -25
0
25
50
75 100 125
1
2
3
4
5
6
7
8
9
10
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
OUTPUT RESISTANCE
vs. SUPPLY VOLTAGE
OUTPUT RESISTANCE
vs. OSCILLATOR FREQUENCY
OUTPUT RESISTANCE
vs. TEMPERATURE
200
1000
80
70
EXTERNAL
HCMOS
OSCILLATOR
180
160
140
900
800
700
ICL7660,
MAX1044 with
BOOST = OPEN
60
50
40
120
100
80
600
500
400
300
200
100
60
40
MAX1044 with
BOOST = V+
30
20
20
0
0
10
1
2
3
4
5
10
1
2
3
4
5
6
7
8
9
10
10
10
FREQUENCY (Hz)
10
-60 -40 -20
0
20 40 60 80 100 120 140
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
4
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
