CMOS Monolithic Voltage Converter
MAX660
_____________________________Typical Operating Characteristics (continued)
EFFICIENCY
vs. OSCILLATOR FREQUENCY
MAX660-6
OSCILLATOR FREQUENCY
OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
vs. SUPPLY VOLTAGE
MAX660-7
96
92
88
EFFICIENCY (%)
84
80
76
72
68
64
60
0.1
1
10
I
LOAD
= 80mA
I
LOAD
= 10mA
I
LOAD
= 1mA
LV = GND
LV = GND
LV = GND
OSCILLATOR FREQUENCY (kHz)
10
8
6
4
2
0
1.5
2.5
3.5
4.5
LV = OPEN
OSCILLATOR FREQUENCY (kHz)
OSCILLATOR FREQUENCY (kHz)
80
80
LV =
= OPEN
LV
OPEN
60
60
FC = V+, OSC = OPEN
40
40
20
20
0
0
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
2.5
VOLTAGE
4.0
1.0 1.5 2.0
SUPPLY
3.0 3.5
(V)
4.5 5.0 5.5
SUPPLY VOLTAGE (V)
FC = V+, OSC = OPEN
FC = OPEN, OSC = OPEN
100
5.5
OSCILLATOR FREQUENCY (kHz)
SUPPLY VOLTAGE (V)
OSCILLATOR FREQUENCY
vs. EXTERNAL CAPACITANCE
MAX660-9
OSCILLATOR FREQUENCY
vs. TEMPERATURE
MAX660-10
OSCILLATOR FREQUENCY
vs. TEMPERATURE
MAX660-10A
100
OSCILLATOR FREQUENCY (kHz)
100
OSCILLATOR FREQUENCY (kHz)
80
FC = V+, OSC = OPEN, RL = 100Ω
60
12
10
8
6
4
2
0
FC = OPEN, OSC = OPEN
R
L
= 100Ω
10
FC = V+
1
FC = OPEN
0.1
40
20
0.01
1
10
100
CAPACITANCE (pF)
1000
10000
0
-60 -40 -20 0
20 40 60 80 100 120 140
TEMPERATURE (°C)
OSCILLATOR FREQUENCY (kHz)
-60
-40 -20 0
20 40 60 80 100 120 140
TEMPERATURE (°C)
OUTPUT SOURCE RESISTANCE
vs. SUPPLY VOLTAGE
MAX660-13
OUTPUT SOURCE RESISTANCE (Ω)
OUTPUT SOURCE RESISTANCE (Ω)
12
10
8
6
4
2
0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
MAX660-11
OUTPUT SOURCE RESISTANCE (Ω)
25
20
15
25
20
15
V+ = 1.5V
10
V+ = 3.0V
5
V+ = 5.0V
0
C1, C2 = 150µF OS-CON CAPACITORS
R
L
= 100Ω
C1, C2 = 150µF ALUMINUM
ELECTROLYTIC
CAPACITORS
R
L
= 100Ω
V+ = 1.5V
10
5
V+ = 3.0V
V+ = 5.0V
5.5
0
-60 -40 -20 0
20 40 60 80 100 120 140
TEMPERATURE (°C)
-60 -40 -20 0
20 40 60 80 100 120 140
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
4
_______________________________________________________________________________________
MAX660-12
14
OUTPUT SOURCE RESISTANCE
vs. TEMPERATURE
30
30
OUTPUT SOURCE RESISTANCE
vs. TEMPERATURE
MAX660-8
100
OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
12
100
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
