100mA CHARGE PUMP DC-TO-DC
VOLTAGECONVERTER
1
2
3
4
5
6
7
8
TC660
TYPICAL 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.
Supply Current vs.
Supply Voltage
1)
2)
3)
Supply Current vs.
Oscillator Frequency
Efficiency vs.
Load Current
600
10,000
100
+
V
= 5.5V
500
400
92
84
1000
DOUBLER MODE
LV = OUT
DOUBLER MODE
300
200
100
100
10
1
+
+
V
= 3.5V
V
= 4.5V
76
68
60
INVERTING MODE
LV = OPEN
+
V
= 2.5V
LV = GND
+
V
= 1.5V
60
0
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
0.01
0.1
1
10
100
0
20
40
80
100
SUPPLY VOLTAGE (V)
OSCILLATOR FREQUENCY (kHz)
LOAD CURRENT (mA)
5)
Output Voltage Drop
vs. Load Current
Output Voltage vs.
Oscillator Frequency
Efficiency vs.
Oscillator Frequency
4)
6)
-5.0
2.0
100
96
I
= 10mA
LOAD
I
= 10mA
LOAD
92
1.6
1.2
-4.5
-4.0
-3.5
-3.0
+
V
= 3.5V
+
88
84
80
I
= 1mA
LOAD
V
= 4.5V
I
= 80mA
+
LOAD
V
= 1.5V
I
=
LOAD
80mA
0.8
0.4
0
76
72
+
V
= 2.5V
68
64
60
I
= 1mA
LOAD
+
V
= 5.5V
80
0
20
40
60
100
0.1 0.2 0.4
1
2
4
10 20 40 100
0.1 0.2 0.4
1
2
4
10 20 40 100
LOAD CURRENT (mA)
OSCILLATOR FREQUENCY (kHz)
OSCILLATOR FREQUENCY (kHz)
Output Source Resistance
vs. Temperature
Output Source Resistance
vs. Supply Voltage
Oscillator Frequency
vs. Supply Voltage
7)
8)
9)
12
15
12
16
14
LV GROUNDED
+
V
= 1.5VDC
10
8
LV OPEN
12
10
8
9
6
3
6
+
V
= 3VDC
FC = OPEN, OSC = OPEN
4
2
6
+
V
= 5VDC
60 80 100
0
4
0
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
-40 -20
0
20
40
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
TELCOM SEMICONDUCTOR, INC.
4-7
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
