MAX1680 Datasheet, PDF (4/12 Pages) Maxim Integrated Products – 125mA, Frequency-Selectable, Switched-Capacitor Voltage Converters

125mA, Frequency-Selectable,
Switched-Capacitor Voltage Converters
__________________________________________Typical Operating Characteristics
(All curves generated using the inverter configuration shown in the Typical Operating Circuits with LV = GND, FSEL = IN or LV,
C1 = C2 = 10µF (MAX1680), C1 = C2 = 2.2µF (MAX1681), and T_A = +25°C, unless otherwise noted. Test results are also valid for
the doubler configuration with LV = OUT and T_A = +25°C.)
800
700
600
500
400
300
200
100
0
0
OUTPUT VOLTAGE DROP
vs. LOAD CURRENT
V_INPUT = 3V
V_INPUT = 5V
20 40 60 80 100 120 140
LOAD CURRENT (mA)
OSCILLATOR FREQUENCY CHANGE
vs. SUPPLY VOLTAGE
2
0
-2
-4 MAX1680
-6
-8
MAX1681
-10
-12
-14
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
OSCILLATOR FREQUENCY CHANGE
vs. TEMPERATURE
10
8
6
4
MAX1681
2
0
MAX1680
-2
-4
-6
-8
-10
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
OUTPUT SOURCE RESISTANCE
vs. SUPPLY VOLTAGE
8.5
7.5
6.5
5.5
4.5
3.5
2.5
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
OUTPUT SOURCE RESISTANCE vs.
TEMPERATURE
6
V_INPUT = 3V
5
4
V_INPUT = 5V
3
2
1
0
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
MAX1680 EFFICIENCY vs.
LOAD CURRENT (INVERTER CONFIGURATION)
100
80
60
40
20
0
1
V_INPUT = 3V
V_INPUT = 4V
V_INPUT = 5.5V
FSEL = IN
10
100
1000
LOAD CURRENT (mA)
4 _______________________________________________________________________________________