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EVALUATION
KIT
AVAILABLE
TC7660S
SUPER CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
FEATURES
GENERAL DESCRIPTION
■ Oscillator boost from 10kHz to 45kHz
■ Converts +5V Logic Supply to ±5V System
■ Wide Input Voltage Range .................... 1.5V to 12V
■ Efficient Voltage Conversion......................... 99.9%
■ Excellent Power Efficiency ............................... 98%
■ Low Power Supply..............................80µA @ 5 VIN
■ Low Cost and Easy to Use
— Only Two External Capacitors Required
■ Available in Small Outline (SOIC) Package
■ Improved ESD Protection ..................... Up to 10kV
■ No External Diode Required for High Voltage
Operation
The TC7660S is a pin-compatible upgrade to the Indus-
try standard TC7660 charge pump voltage converter. It
converts a +1.5V to +12V input to a corresponding -1.5V to
-12V output using only two low-cost capacitors, eliminating
inductors and their associated cost, size and EMI. Added
features include an extended supply range to 12V, and a
frequencyboostpinforhigheroperatingfrequency, allowing
the use of smaller external capacitors.
Theon-boardoscillatoroperatesatanominalfrequency
of 10kHz. Frequency is increased to 45kHz when pin 1 is
connected to V+. Operation below 10kHz (for lower supply
current applications) is possible by connecting an external
capacitor from OSC to ground (with pin 1 open).
The TC7660S is available in both 8-pin DIP and 8-pin
small outline (SOIC) packages in commercial and extended
temperature ranges.
ORDERING INFORMATION
Temperature
Part No.
Package
Range
TC7660SCOA
TC7660SCPA
TC7660SEJA
TC7660SEOA
TC7660SEPA
TC7660SMJA
TC7660EV
8-Pin SOIC
0°C to +70°C
0°C to +70°C
PIN CONFIGURATION (DIP and SOIC)
8-Pin Plastic DIP
8-Pin CerDIP
8-Pin SOIC
– 40°C to +85°C
– 40°C to +85°C
– 40°C to +85°C
– 55°C to +125°C
+
V
+
Boost
8
7
6
5
Boost
1
2
3
4
8
7
6
5
1
2
3
4
V
+
+
OSC
CAP
CAP
OSC
LOW
VOLTAGE (LV)
8-Pin Plastic DIP
8-Pin CerDIP
Evaluation Kit for
LOW
VOLTAGE (LV)
GND
TC7660SCPA
TC7660SEJA
TC7660SEPA
GND
TC7660SCOA
TC7660SEOA
–
CAP
–
V
CAP
V
OUT
OUT
Charge Pump Family
FUNCTIONAL BLOCK DIAGRAM
+
+
V
CAP
2
8
1
BOOST
VOLTAGE–
LEVEL
TRANSLATOR
7
6
RC
4
÷ 2
–
OSC
LV
CAP
V
OSCILLATOR
5
OUT
INTERNAL
VOLTAGE
REGULATOR
LOGIC
NETWORK
TC7660S
3
GND
TC7660S-14 9/16/96
TELCOM SEMICONDUCTOR, INC.
4-69
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
