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
MAX14/ICL760
__________________________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(V+ = 5V; C
= 0.1µF; C1 = C2 = 10µF; LV = open; OSC = open; T = +25°C; unless otherwise noted.)
A
BYPASS
OUTPUT VOLTAGE and OUTPUT RIPPLE
vs. LOAD CURRENT
OUTPUT VOLTAGE and OUTPUT RIPPLE
vs. LOAD CURRENT
OUTPUT VOLTAGE and OUTPUT RIPPLE
vs. LOAD CURRENT
-2.0
-1.5
400
800
720
-10
-9
700
630
560
490
-5.0
-4.5
-4.0
A
OUTPUT VOLTAGE
A
OUTPUT
VOLTAGE
OUTPUT
B
350
300
250
VOLTAGE
C
-8
640
560
480
400
320
240
160
80
A: MAX1044 with
B
A: MAX1044 with
BOOST = V+
B: ICL7660
C: MAX1044 with
BOOST = OPEN
A: MAX1044 with
BOOST = V+
B: ICL7660
-7
-6
-5
-4
-3
-2
-1
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
BOOST = V+
B: ICL7660
420
350
280
C: MAX1044 with
BOOST = OPEN
-1.0 C: MAX1044 with
BOOST = OPEN
200
150
C
C
B
OUTPUT
RIPPLE
C
C
V+ = 10V
LV = OPEN
V+ = 5V
LV = OPEN
210
140
V+ = 2V
LV = GND
-0.5
100
B
B
A
50
0
70
0
A
A
OUTPUT RIPPLE
OUTPUT RIPPLE
0
0
0
0
0
1
2
3
4
5
6
7
8
9
10
0
5
10 15 20 25 30 35 40
LOAD CURRENT (mA)
0
5
10 15 20 25 30 35 40
LOAD CURRENT (mA)
LOAD CURRENT (mA)
EFFICIENCY and SUPPLY CURRENT
vs. LOAD CURRENT
EFFICIENCY and SUPPLY CURRENT
vs. LOAD CURRENT
EFFICIENCY and SUPPLY CURRENT
vs. LOAD CURRENT
10
9
100
90
50
45
40
35
50
45
40
35
100
90
100
90
B, C
A
A
EFFICIENCY
EFFICIENCY
EFFICIENCY
B
8
80
80
80
A: MAX1044 with
C
A: MAX1044 with
BOOST = V+
B: ICL7660
C: MAX1044 with
BOOST = OPEN
7
70
60
50
40
30
20
10
70
60
50
40
30
20
10
70
60
50
40
30
20
10
BOOST = V+
B: ICL7660
C: MAX1044 with
BOOST = OPEN
6
5
30
25
30
25
SUPPLY CURRENT
4
3
2
1
SUPPLY CURRENT 20
SUPPLY CURRENT
20
15
10
5
15
10
5
V+ = 5V
LV = OPEN
V+ = 2V
LV = GND
V+ = 10V
LV = OPEN
0
0
0
0
0
0
0
1
2
3
4
5
6
7
8
9
10
0
5
10 15 20 25 30 35 40
LOAD CURRENT (mA)
0
5
10 15 20 25 30 35 40
LOAD CURRENT (mA)
LOAD CURRENT (mA)
EFFICIENCY
vs. OSCILLATOR FREQUENCY
OSCILLATOR FREQUENCY
vs. EXTERNAL CAPACITANCE
OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
100
100,000
100,000
10,000
1000
MAX1044 with
BOOST -V+
90
80
70
60
50
40
30
10,000
1000
ICL7660 and
MAX1044 with
BOOST = OPEN
100
10
1
FROM TOP TO BOTTOM AT 5V
MAX1044, BOOST = V+, LV = GND
MAX1044, BOOST = V+, LV = OPEN
ICL7660, LV = GND
ICL7660, LV = OPEN
MAX1044, BOOST = OPEN, LV = GND
MAX1044, BOOST = OPEN, LV = OPEN
EXTERNAL
HCMOS
OSCILLATOR
0.1
100
1
2
3
4
5
5
6x10
10
10
10
10
10
1
10
100
C
1000 10,000 100,000
(pF)
1
2
3
4
5
6
7
8
9
10
OSCILLATOR FREQUENCY (Hz)
SUPPLY VOLTAGE (V)
OSC
_______________________________________________________________________________________
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
