M
Features
Wide Input Voltage Range: +1.5V to +10V
Efficient Voltage Conversion (99.9%, typ)
Excellent Power Efficiency (98%, typ)
Low Power Consumption: 80 µA (typ) @ V
IN
= 5V
Low Cost and Easy to Use
- Only Two External Capacitors Required
• Available in 8-Pin Small Outline (SOIC), 8-Pin
PDIP and 8-Pin CERDIP Packages
• Improved ESD Protection (3 kV HBM)
• No External Diode Required for High-Voltage
Operation
•
•
•
•
•
TC7660
Package Types
PDIP/CERDIP/SOIC
NC
CAP
+
GND
CAP
-
1
2
3
4
8
V
+
OSC
LOW
VOLTAGE (LV)
V
OUT
Charge Pump DC-to-DC Voltage Converter
TC7660
7
6
5
General Description
The TC7660 is a pin-compatible replacement for the
industry standard 7660 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, eliminating inductors and their
associated cost, size and electromagnetic interference
(EMI).
The on-board oscillator operates at a nominal
frequency of 10 kHz. Operation below 10 kHz (for
lower supply current applications) is possible by
connecting an external capacitor from OSC to ground.
The TC7660 is available in 8-Pin PDIP, 8-Pin Small
Outline (SOIC) and 8-Pin CERDIP packages in
commercial and extended temperature ranges.
Applications
•
•
•
•
RS-232 Negative Power Supply
Simple Conversion of +5V to ±5V Supplies
Voltage Multiplication V
OUT
= ± n V
+
Negative Supplies for Data Acquisition Systems
and Instrumentation
Functional Block Diagram
V
+
CAP
+
8
2
OSC
LV
7
6
RC
Oscillator
÷
2
Voltage
Level
Translator
4
CAP-
5
Internal
Internal
Voltage
Voltage
Regulator
Regulator
V
OUT
TC7660
3
GND
Logic
Network
2002 Microchip Technology Inc.
DS21465B-page 1
MICROCHIP [ MICROCHIP TECHNOLOGY ]
