LMC7660 Datasheet, PDF (1/12 Pages) National Semiconductor (TI) – Switched Capacitor Voltage Converter

April 1997
LMC7660
Switched Capacitor Voltage Converter
General Description
The LMC7660 is a CMOS voltage converter capable of con-
verting a positive voltage in the range of +1.5V to +10V to
the corresponding negative voltage of −1.5V to −10V. The
LMC7660 is a pin-for-pin replacement for the
industry-standard 7660. The converter features: operation
over full temperature and voltage range without need for an
external diode, low quiescent current, and high power effi-
ciency.
The LMC7660 uses its built-in oscillator to switch 4 power
MOS switches and charge two inexpensive electrolytic ca-
pacitors.
Features
n Operation over full temperature and voltage range
without an external diode
n Low supply current, 200 µA max
n Pin-for-pin replacement for the 7660
n Wide operating range 1.5V to 10V
n 97% Voltage Conversion Efficiency
n 95% Power Conversion Efficiency
n Easy to use, only 2 external components
n Extended temperature range
n Narrow SO-8 Package
Block Diagram
Pin Configuration
DS009136-1
Ordering Information
Package
8-Lead Molded DIP
8-Lead Molded Small Outline
DS009136-2
Temperature Range
Industrial
−40˚C to +85˚C
LMC7660IN
LMC7660IM
NSC
Drawing
N08E
M08A
© 1997 National Semiconductor Corporation DS009136
www.national.com