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MAX660
CMOS Monolithic Voltage Converter
4 _______________________________________________________________________________________
14
0
1.5 2.5 4.5
OUTPUT SOURCE RESISTANCE
vs. SUPPLY VOLTAGE
8
12
SUPPLY VOLTAGE (V)
OUTPUT SOURCE RESISTANCE (Ω)
3.5
10
6
4
2
2.0 3.0 4.0 5.55.0
MAX660-13
76
0.1 10 100
EFFICIENCY
vs. OSCILLATOR FREQUENCY
96
OSCILLATOR FREQUENCY (kHz)
EFFICIENCY (%)
1
88
60
I
LOAD
= 80mA
100
92
84
80
72
68
64
MAX660-6
I
LOAD
= 10mA
I
LOAD
= 1mA
100
0
1.0
OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
20
80
SUPPLY VOLTAGE (V)
OSCILLATOR FREQUENCY (kHz)
3.5
40
1.5 2.0 4.0
60
2.5 3.0 4.5 5.0 5.
FC = V+, OSC = OPEN
LV = GND
LV = OPEN
12
0
1.5 5.5
OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
2
10
SUPPLY VOLTAGE (V)
OSCILLATOR FREQUENCY (kHz)
4.5
6
4
2.5 3.5
8
LV = GND
LV = OPEN
FC = OPEN, OSC = OPEN
MAX660-8
100
0.01
1 100
OSCILLATOR FREQUENCY
vs. EXTERNAL CAPACITANCE
0.1
MAX660-9
CAPACITANCE (pF)
OSCILLATOR FREQUENCY (kHz)
1
10
10 1000
FC = OPEN
FC = V+
1000
0
100
0
-60 140
OSCILLATOR FREQUENCY
vs. TEMPERATURE
20
80
TEMPERATURE (°C)
OSCILLATOR FREQUENCY (kHz)
0
60
40
-40 -20 100
20 40 60 80 120
FC = V+, OSC = OPEN, RL = 100
Ω
MAX660-10
12
0
-60 140
OSCILLATOR FREQUENCY
vs. TEMPERATURE
2
10
TEMPERATURE (°C)
OSCILLATOR FREQUENCY (kHz)
80
6
4
0 20 100
8
-40 -20 40 60 120
FC = OPEN, OSC = OPEN
R
L
= 100Ω
MAX660-10A
30
0
-60 140
OUTPUT SOURCE RESISTANCE
vs. TEMPERATURE
5
25
TEMPERATURE
(
°C
)
OUTPUT SOURCE RESISTANCE (Ω)
0
15
10
-40 -20 20
20
40 60 80 100 120
V+ = 5.0V
C1, C2 = 150
µF ALUMINUM
ELECTROLYTIC
CAPACITORS
R
L
= 100Ω
V+ = 3.0V
MAX660
-
11
V+ = 1.5V
_____________________________Typical Operating Characteristics (continued)
30
0
-60 140
OUTPUT SOURCE RESISTANCE
vs. TEMPERATURE
5
25
TEMPERATURE (°C)
OUTPUT SOURCE RESISTANCE (Ω)
0
15
10
-40 -20 20
20
40 60 80 100 120
C1, C2 = 150
µF OS-CON CAPACITORS
R
L
= 100Ω
V+ = 5.0V
V+ = 1.5V
V+ = 3.0V
MAX660-12
100
0
1.0
OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
20
80
SUPPLY VOLTAGE (V)
OSCILLATOR FREQUENCY (kHz)
3.5
40
1.5 2.0 4.0
60
2.5 3.0 4.5 5.0 5.5
FC = V+, OSC = OPEN
LV = GND
LV = OPEN
MAX660-7