SNVS002D – JANUARY 1999 – REVISED MAY 2013
LM2662/LM2663 Switched Capacitor Voltage Converter
Check for Samples:
1
FEATURES
Inverts or Doubles Input Supply Voltage
8-Pin SOIC Package
3.5Ω Typical Output Resistance
86% Typical Conversion Efficiency at 200 mA
(LM2662) Selectable Oscillator Frequency: 20
kHz/150 kHz
(LM2663) Low Current Shutdown Mode
DESCRIPTION
The LM2662/LM2663 CMOS charge-pump voltage
converter inverts a positive voltage in the range of
1.5V to 5.5V to the corresponding negative voltage.
The LM2662/LM2663 uses two low cost capacitors to
provide 200 mA of output current without the cost,
size, and EMI related to inductor based converters.
With an operating current of only 300
μA
and
operating efficiency greater than 90% at most loads,
the LM2662/LM2663 provides ideal performance for
battery powered systems. The LM2662/LM2663 may
also be used as a positive voltage doubler.
The oscillator frequency can be lowered by adding an
external capacitor to the OSC pin. Also, the OSC pin
may be used to drive the LM2662/LM2663 with an
external clock. For LM2662, a frequency control (FC)
pin selects the oscillator frequency of 20 kHz or 150
kHz. For LM2663, an external shutdown (SD) pin
replaces the FC pin. The SD pin can be used to
disable the device and reduce the quiescent current
to 10
μA.
The oscillator frequency for LM2663 is 150
kHz.
•
•
•
•
•
2
•
APPLICATIONS
•
•
•
•
•
•
Laptop computers
Cellular phones
Medical instruments
Operational amplifier power supplies
Interface power supplies
Handheld instruments
Basic Application Circuits
Voltage Inverter
Positive Voltage Doubler
Splitting V
IN
in Half
1
2
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
Copyright © 1999–2013, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
TI [ TEXAS INSTRUMENTS ]
