LM2662_15 Datasheet, PDF (1/25 Pages) Texas Instruments – LM266x Switched Capacitor Voltage Converter

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
LM2662, LM2663
SNVS002E – JANUARY 1999 – REVISED OCTOBER 2014
LM266x Switched Capacitor Voltage Converter
1 Features
•1 Inverts or Doubles Input Supply Voltage
• 3.5-Ω Typical Output Resistance
• 86% Typical Conversion Efficiency at 200 mA
• (LM2662) Selectable Oscillator Frequency: 20
kHz/150 kHz
• (LM2663) Low Current Shutdown Mode
2 Applications
• Laptop Computers
• Cellular Phones
• Medical Instruments
• Operational Amplifier Power Supplies
• Interface Power Supplies
• Handheld Instruments
space
space
Voltage Inverter
3 Description
The LM2662/LM2663 CMOS charge-pump voltage
converter inverts a positive voltage in the range of 1.5
V to 5.5 V 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.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
LM2662
LM2663
SOIC (8)
4.90 mm x 3.91 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
space
space
Positive Voltage Doubler
Splitting V_IN in Half
* Please see Positive Voltage Doubler
section regarding choice of D1.
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.