Rainbow Electronics MAX660 - Manual (Page 3)

MAX660
CMOS Monolithic Voltage Converter
_________________________________________________________________________________________________ 3
100
60
0 20 60 100
EFFICIENCY vs. LOAD CURRENT
68
92
LOAD CURRENT (mA)
EFFICIENCY (%)
40 80
84
76
MAX660-2
V+ = 5.5V
V+ = 4.5V
V+ = 3.5V
V+ = 1.5V
V+ = 2.5V
400
0
1.5 2.5 4.5 5.5
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
100
300
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
µ
A)
3.5
200
350
250
150
50
2.0 3.0 4.0 5.0
LV = OUT
LV = GND
LV = OPEN
MAX660-1
10
0.01
0.1 10 100
SUPPLY CURRENT
vs. OSCILLATOR FREQUENCY
0.1
1
OSCILLATOR FREQUENCY (kHz)
SUPPLY CURRENT (mA)
1
MAX660-4
-3.0
-5.0
0 20 60 100
OUTPUT VOLTAGE AND EFFICIENCY
vs. LOAD CURRENT, V+ = 5V
-4.6
-3.4
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
40 80
-3.8
-4.2
100
92
84
76
68
60
EFFICIENCY (%)
ICL7660
ICL7660
MAX660
MAX660
V OUT
EFF.
MAX660-6A
1.2
0
0 100
OUTPUT VOLTAGE DROP
vs. LOAD CURRENT
0.2
1.0
LOAD CURRENT (mA)
OUTPUT
VOLTAGE
DROP
FROM
SUPPLY
(V)
60
0.6
0.4
20 40 80
0.8
10 30 50 70 90
V+ = 4.5V
V+ = 5.5V
V+ = 3.5V
V+ = 2.5V
V+ = 1.5V
MAX660-3
__________________________________________Typical Operating Characteristics
-4.0
0.1 10 100
OUTPUT VOLTAGE
vs. OSCILLATOR FREQUENCY
-3.5
-5.0
OSCILLATOR FREQUENCY (kHz)
OUTPUT VOLTAGE (V)
1
-4.5
-3.0
I LOAD = 1mA
I LOAD = 80mA
MAX660-5
I LOAD = 10mA
MAX660
1
2
3
4
8
7
6
5
V+
C2
C1
I S
V+
(+5V )
V OUT
R
L
I
L
CAP+
FC
GND
CAP-
OSC
V+
LV
OUT
Figure 1. MAX660 Test Circuit
All curves are generated using the test circuit of Figure 1
with V+ =5V, LV = GND, FC = open, and T
A
= +25°C,
unless otherwise noted. The charge-pump frequency is
one-half the oscillator frequency. Test results are also
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.