TC7660CPA TELCOM SEMICONDUCTOR, TC7660CPA Datasheet - Page 9
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TC7660CPA
Manufacturer Part Number
TC7660CPA
Description
IC, VOLT CONVERTER, 7660, DIP8
Manufacturer
TELCOM SEMICONDUCTOR
Datasheet
1.TC7660CPA.pdf
(18 pages)
Specifications of TC7660CPA
Primary Input Voltage
5V
No. Of Outputs
1
Output Voltage
-10V
Output Current
20mA
Voltage Regulator Case Style
DIP
No. Of Pins
8
Operating Temperature Range
0°C To +70°C
Operating Temperature
RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TC7660CPA
Manufacturer:
Microchi
Quantity:
5 510
Company:
Part Number:
TC7660CPA
Manufacturer:
AD
Quantity:
5 510
Part Number:
TC7660CPA
Manufacturer:
TELCOM
Quantity:
20 000
FIGURE 5-7:
Converter And Positive Multiplier.
5.7
Since the switches that allow the charge pumping
operation are bidirectional, the charge transfer can be
performed
Figure 5-8 shows a TC7660 transforming -5V to +5V
(or +5V to +10V, etc.). The only problem here is that the
internal clock and switch-drive section will not operate
until some positive voltage has been generated. An ini-
tial inefficient pump, as shown in Figure 5-7, could be
used to start this circuit up, after which it will bypass the
other (D
else the diode and resistor shown dotted in Figure 5-8
can be used to "force" the internal regulator on.
FIGURE 5-8:
Conversion.
10 µF
2002 Microchip Technology Inc.
+
C
C
1
1
1
+
1
2
3
4
Efficient Positive Voltage
Multiplication/Conversion
and D
TC7660
backwards
1
2
3
4
2
C
in Figure 5-7 would never turn on), or
TC7660
2
+
8
7
6
5
Combined Negative
Positive Voltage
as
8
7
6
5
V
+
V
OUT
1 M
easily
= -V
V
D
D
-
1
2
input
-
V
(2 V
as
+
+
OUT
+
C
C
) - (2 V
+
=
forwards.
3
4
10 µF
V
= -V
OUT
F
+
)
TC7660
DS21465B-page 9