TC1044S Datasheet, PDF (7/11 Pages) TelCom Semiconductor, Inc – CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER

Charge Pump DC-TO-DC Voltage Converter
C1 ⁺
10µF
VOUT = –V^–
1
8
2
7
TC1044S
3
6
1 MΩ
+
10µF
4
5
V^– INPUT
Figure 10. Positive Voltage Conversion
TC1044S
V+
+
RL1
50 µF
1
8
VVO+U_{–TV=–}
2
+
50
µF
RL2
2
7
TC1044S
1 MΩ
3
6
100
kΩ
100
kΩ
4
5
50 ⁺
µF
V^–
Figure 11. Splitting a Supply in Half
TYPICAL CHARACTERISTICS
Unloaded Osc Freq vs. Temperature
12
10
8
6
V_IN = 5V
4
V_IN = 12V
2
0-40 _-20
0 20 40 60
TEMPERATURE (°C)
80 100
Unloaded Osc Freq vs. Temperature
with Boost Pin = V_IN
60
50
40
V_IN = 5V
30
V_IN = 12V
20
10
0-40 _-20
0 20 40 60
TEMPERATURE (°C)
80 100
Supply Current vs. Temperature
(with Boost Pin = V_IN)
1000
800
600
V_IN = 12V
400
200
0-40 _{-20 0}
20 40
TEMPERATURE (°C)
© 2001 Microchip Technology Inc. DS21348A
V_IN = 5V
60 80 100
7
Voltage Conversion
101.0
100.5
100.0
Without Load
99.5
10K Load
99.0
98.5
T_A = 25°C
98.01 _{2 3 4 5 6 7 8 9 10 11 12}
INPUT VOLTAGE V_IN (V)
TC1044S-12 9/16/96