TC7660SEOA713 Microchip Technology, TC7660SEOA713 Datasheet - Page 4
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TC7660SEOA713
Manufacturer Part Number
TC7660SEOA713
Description
HIGH VOLTAGE DC-DC CONVERTER,
Manufacturer
Microchip Technology
Type
Switched Capacitor (Charge Pump), Invertingr
Specifications of TC7660SEOA713
Rohs Compliant
YES
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
-1.5 ~ -12 V
Current - Output
20mA
Frequency - Switching
10kHz ~ 45kHz
Voltage - Input
1.5 ~ 12 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Power - Output
470mW
Function
Inverting, Step Up
Output Voltage
- 12 V to - 1.5 V, 3 V to 24 V
Output Current
20 mA
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
TC7660SEOA713RTR
TC7660SEOA713RTR
TC7660SEOA713TR
TC7660SEOA713RTR
TC7660SEOA713TR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TC7660SEOA713
Manufacturer:
Microchip Technology
Quantity:
75 225
TC7660S-14 9/16/96
TC7660S
Dos and Don'ts
• Do not exceed maximum supply voltages.
• Do not connect the LV terminal to GND for supply
• Do not short circuit the output to V
• When using polarized capacitors in the inverting mode,
Simple Negative Voltage Converter
tive supply where a positive supply is available. A similar
scheme may be employed for supply voltages anywhere in
the operating range of +1.5V to +12V, keeping in mind that
pin 6 (LV) is tied to the supply negative (GND) only for supply
voltages below 3.5V.
10 F
voltages greater than 3.5V.
above 5.5V for extended periods; however, transient
conditions including start-up are okay.
the + terminal of C
TC7660S and the + terminal of C
to GND.
C 1
Figure 3 shows typical connections to provide a nega-
*
NOTES:
C 1
+
Figure 3. Simple Negative Converter
1
2
3
4
1
2
3
4
TC7660S
TC7660S
1
must be connected to pin 2 of the
"1"
8
7
6
5
8
7
6
5
V
+
2
Figure 4. Paralleling Devices Lowers Output Impedance
+
must be connected
V +
supply for voltages
+
C 2
10 F
V OUT
C 1
*
4
those of a nearly ideal voltage source in series with 70 .
Thus, for a load current of –10mA and a supply voltage of
+5V, the output voltage would be – 4.3V.
primarily, to capacitive reactance of the charge transfer
capacitor (C
output for only 1/2 of the cycle, the equation is:
where f = 10kHz and C
Paralleling Devices
paralleled to reduce output resistance (Figure 4). The reser-
voir capacitor, C
requires its own pump capacitor, C
resistance would be approximately:
1
2
3
4
The output characteristics of the circuit in Figure 3 are
The dynamic output impedance of the TC7660S is due,
Any number of TC7660S voltage converters may be
TC7660S
SUPER CHARGE PUMP DC-TO-DC
"n"
R
OUT
1
). Since this capacitor is connected to the
=
8
7
6
5
2
, serves all devices, while each device
n (number of devices)
X
R
C
OUT
=
VOLTAGE CONVERTER
1
= 10 F.
2 f C
(of TC7660S)
2
© 2001 Microchip Technology Inc.
1
+
= 3.18
C 2
1
R L
. The resultant output
DS21467A