EVALUATION
KIT
AVAILABLE
TC7660
CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
GENERAL DESCRIPTION
FEATURES
The TC7660 is a pin-compatible replacement for the
Industry standard TC7660 charge pump voltage converter.
It converts a +1.5V to +10V input to a corresponding – 1.5V
to -10V output using only two low-cost capacitors, eliminat-
ing inductors and their associated cost, size and EMI.
The on-board oscillator operates at a nominal fre-
quency of 10kHz. Operation below 10kHz (for lower supply
current applications) is possible by connecting an external
capacitor from OSC to ground (with pin 1 open).
The TC7660 is available in both 8-pin DIP and 8-pin
SOIC packages in commercial and extended temperature
ranges.
■ Converts +5V Logic Supply to ±5V System
■ Wide Input Voltage Range ....................1.5V to 10V
■ Efficient Voltage Conversion......................... 99.9%
■ Excellent Power Efficiency ............................... 98%
■ Low Power Supply...............................80µA @ 5VIN
■ Low Cost and Easy to Use
— Only Two External Capacitors Required
■ RS232 Negative Power Supply
■ Available in Small Outline (SO) Package
■ Improved ESD Protection ....................... Up to 3kV
■ No Dx Diode Required for High Voltage Operation
ORDERING INFORMATION
PIN CONFIGURATION (DIP and SOIC)
Temperature
Part No.
Package
Range
+
V
+
NC
1
2
3
4
8
7
6
5
NC
8
7
6
5
V
1
2
3
4
TC7660COA
TC7660CPA
TC7660EOA
TC7660EPA
TC7660IJA
TC7660MJA
TC7660EV
8-Pin SOIC
0°C to +70°C
0°C to +70°C
+
–
+
–
OSC
CAP
GND
CAP
CAP
GND
OSC
8-Pin Plastic DIP
8-Pin SOIC
LOW
VOLTAGE (LV)
LOW
VOLTAGE (LV)
TC7660COA
TC7660CPA
TC7660CPA
TC7660EPA
TC7660IJA
– 40°C to +85°C
– 40°C to +85°C
– 40°C to +85°C
– 55°C to +125°C
V
V
CAP
OUT
OUT
8-Pin Plastic DIP
8-Pin CerDIP
8-Pin CerDIP
Evaluation Kit for
NC = NO INTERNAL CONNECTION
Charge Pump Family
FUNCTIONAL BLOCK DIAGRAM
+
+
V
CAP
8
2
VOLTAGE–
LEVEL
TRANSLATOR
7
6
RC
4
÷ 2
–
OSC
LV
CAP
OSCILLATOR
5
V
OUT
INTERNAL
VOLTAGE
REGULATOR
LOGIC
NETWORK
TC7660
3
GND
© 2001 Microchip Technology Inc. DS21465A
TC7660-7 9/30/96