MAX1044 Datasheet, PDF (3/12 Pages) Maxim Integrated Products – Switched-Capacitor Voltage Converters

Switched-Capacitor Voltage Converters
__________________________________________Typical Operating Characteristics
(V+ = 5V; C_BYPASS = 0.1µF; C1 = C2 = 10µF; LV = open; OSC = open; T_A = +25°C; unless otherwise noted.)
OUTPUT VOLTAGE and OUTPUT RIPPLE
vs. LOAD CURRENT
-2.0
400
OUTPUT
VOLTAGE
350
-1.5
A: MAX1044 with
BOOST = V+
B: ICL7660
-1.0 C: MAX1044 with
BOOST = OPEN
C
-0.5
B
A
0
0 1 2 34 5
300
250
200
150
V+ = 2V
LV = GND ¹⁰⁰
50
OUTPUT RIPPLE
0
6 7 8 9 10
LOAD CURRENT (mA)
OUTPUT VOLTAGE and OUTPUT RIPPLE
vs. LOAD CURRENT
-5.0
800
OUTPUT VOLTAGE
-4.5
720
A
-4.0
640
A: MAX1044 with
B
-3.5
BOOST = V+
560
-3.0 ^{B: ICL7660}
C: MAX1044 with
-2.5 _{BOOST = OPEN}
480
C ⁴⁰⁰
-2.0
320
-1.5
C
V+ = 5V
240
LV = OPEN
-1.0
B
160
-0.5
0
0
80
A
OUTPUT RIPPLE
0
5 10 15 20 25 30 35 40
LOAD CURRENT (mA)
OUTPUT VOLTAGE and OUTPUT RIPPLE
vs. LOAD CURRENT
-10
-9 ^OUTPUT
VOLTAGE
-8
-7
A: MAX1044 with
BOOST = V+
-6 B: ICL7660
C: MAX1044 with
-5
BOOST = OPEN
-4
-3
OUTPUT
RIPPLE
C
-2
B
-1
A
0
0 5 10 15 20
A
B
C
V+ = 10V
LV = OPEN
25 30 35
700
630
560
490
420
350
280
210
140
70
0
40
LOAD CURRENT (mA)
EFFICIENCY and SUPPLY CURRENT
vs. LOAD CURRENT
100
10
90
9
EFFICIENCY
80
8
70
7
60
6
50
5
40
SUPPLY CURRENT 4
30
3
20
2
10
V+ = 2V
1
LV = GND
0
0
0 1 2 3 4 5 6 7 8 9 10
LOAD CURRENT (mA)
EFFICIENCY
vs. OSCILLATOR FREQUENCY
100
90
80
70
60
50
40
30
10¹
EXTERNAL
HCMOS
OSCILLATOR
10²
10³
10⁴
10⁵ 6x10⁵
OSCILLATOR FREQUENCY (Hz)
EFFICIENCY and SUPPLY CURRENT
vs. LOAD CURRENT
100
50
90 _EFFICIENCY
80
A: MAX1044 with
70 _{BOOST = V+}
60 ^{B: ICL7660}
C: MAX1044 with
50 _{BOOST = OPEN}
40
A
45
B
40
C
35
30
25
SUPPLY CURRENT 20
30
15
20
V+ = 5V
LV = OPEN
10
10
5
0
0
0 5 10 15 20 25 30 35 40
LOAD CURRENT (mA)
100,000
10,000
OSCILLATOR FREQUENCY
vs. EXTERNAL CAPACITANCE
MAX1044 with
BOOST -V+
1000
100
10
ICL7660 and
MAX1044 with
BOOST = OPEN
1
0.1
1
10 100 1000 10,000 100,000
COSC (pF)
EFFICIENCY and SUPPLY CURRENT
vs. LOAD CURRENT
100
50
B, C
A
90
45
EFFICIENCY
80
40
70
A: MAX1044 with
BOOST = V+
35
60 B: ICL7660
30
50
C: MAX1044 with
BOOST = OPEN
25
40
SUPPLY CURRENT 20
30
15
20
10
10
V+ = 10V
LV = OPEN
5
0
0
0 5 10 15 20 25 30 35 40
LOAD CURRENT (mA)
100,000
OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
10,000
1000
100
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
2 3 4 5 6 7 8 9 10
SUPPLY VOLTAGE (V)
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