MAX660C Просмотр технического описания (PDF) - Maxim Integrated
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MAX660C Datasheet PDF : 12 Pages
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CMOS Monolithic Voltage Converter
__________________________________________Typical Operating Characteristics
All curves are generated using the test circuit of Figure 1
with V+ =5V, LV = GND, FC = open, and TA = +25°C,
unless otherwise noted. The charge-pump frequency is
one-half the oscillator frequency. Test results are also V+
valid for doubler mode with GND = +5V, LV = OUT, and
OUT = 0V, unless otherwise noted; however, the input
voltage is restricted to +2.5V to +5.5V.
C1
1 FC
V+ 8
2 CAP+
OSC 7
3 GND MAX660 LV 6
IS
V+
(+5V )
4 CAP-
OUT 5
IL
C2
RL
VOUT
Figure 1. MAX660 Test Circuit
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
400
350
300
LV = OUT
250
200
150
LV = GND
100
50
LV = OPEN
0
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
SUPPLY CURRENT
vs. OSCILLATOR FREQUENCY
10
1
0.1
0.01
0.1
1
10
100
OSCILLATOR FREQUENCY (kHz)
OUTPUT VOLTAGE AND EFFICIENCY
vs. LOAD CURRENT, V+ = 5V
-3.0
100
MAX660
-3.4
ICL7660
92
-3.8
EFF.
84
VOUT
-4.2
76
ICL7660
-4.6
68
MAX660
-5.0
0
20
40
60
80
LOAD CURRENT (mA)
60
100
EFFICIENCY vs. LOAD CURRENT
100
V+ = 5.5V
92
84
V+ = 3.5V
V+ = 1.5V V+ = 4.5V
76
V+ = 2.5V
68
60
0
20
40
60
80
100
LOAD CURRENT (mA)
OUTPUT VOLTAGE DROP
vs. LOAD CURRENT
1.2
1.0
V+ = 1.5V
0.8
V+ = 2.5V
0.6
V+ = 3.5V
0.4
V+ = 4.5V
0.2
V+ = 5.5V
0
0 10 20 30 40 50 60 70 80 90 100
LOAD CURRENT (mA)
OUTPUT VOLTAGE
vs. OSCILLATOR FREQUENCY
-5.0
ILOAD = 1mA
-4.5
ILOAD = 10mA
-4.0
ILOAD = 80mA
-3.5
-3.0
0.1
1
10
100
OSCILLATOR FREQUENCY (kHz)
_________________________________________________________________________________________________ 3
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