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PDF LM2660MM Data sheet ( Hoja de datos )

Número de pieza LM2660MM
Descripción Switched Capacitor Voltage Converter
Fabricantes National Semiconductor 
Logotipo National Semiconductor Logotipo



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No Preview Available ! LM2660MM Hoja de datos, Descripción, Manual

September 1999
LM2660/LM2661
Switched Capacitor Voltage Converter
General Description
The LM2660/LM2661 CMOS charge-pump voltage con-
verter inverts a positive voltage in the range of 1.5V to 5.5V
to the corresponding negative voltage. The LM2660/LM2661
uses two low cost capacitors to provide 100 mA of output
current without the cost, size, and EMI related to inductor
based converters. With an operating current of only 120 µA
and operating efficiency greater than 90% at most loads, the
LM2660/LM2661 provides ideal performance for battery
powered systems. The LM2660/LM2661 may also be used
as a positive voltage doubler.
The oscillator frequency can be lowered by adding an exter-
nal capacitor to the OSC pin. Also, the OSC pin may be used
to drive the LM2660/LM2661 with an external clock. For
LM2660, a frequency control (FC) pin selects the oscillator
frequency of 10 kHz or 80 kHz. For LM2661, 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 0.5 µA. The oscillator frequency for the LM2661 is 80 kHz.
Features
n Inverts or doubles input supply voltage
n Narrow SO-8 and Mini SO-8 Package
n 6.5typical output resistance
n 88% typical conversion efficiency at 100 mA
n (LM2660) selectable oscillator frequency: 10 kHz/80 kHz
n (LM2661) low current shutdown mode
Applications
n Laptop computers
n Cellular phones
n Medical instruments
n Operational amplifier power supplies
n Interface power supplies
n Handheld instruments
Basic Application Circuits
Voltage Inverter
Positive Voltage Doubler
DS012911-3
Splitting VIN in Half
DS012911-4
© 1999 National Semiconductor Corporation DS012911
DS012911-26
www.national.com

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LM2660MM pdf
Connection Diagrams
8-Lead SO (M) or Mini SO (MM)
DS012911-1
DS012911-2
Top View
Order Number LM2660M, LM2661M, LM2660MM or LM2661MM
See NS Package Number M08A and MUA08A
Ordering Information
Order Number
LM2660M
LM2660MX
LM2660MM
LM2660MMX
LM2661M
LM2661MX
LM2661MM
LM2661MMX
Package Number
M08A
M08A
MUA08A
MUA08A
M08A
M08A
MUA08A
MUA08A
Package Marking
Datecode
LM26
60M
Datecode
LM26
60M
S01A (Note 9)
S01A (Note 9)
Datecode
LM26
61M
Datecode
LM26
61M
S02A (Note 9)
S02A (Note 9)
Supplied As
Rail (95 units/rail)
Tape and Reel (2500 units/rail)
Tape and Reel (250 units/rail)
Tape and Reel (3500 units/rail)
Rail (95 units/rail)
Tape and Reel (2500 units/rail)
Tape and Reel (250 units/rail)
Tape and Reel (3500 units/rail)
Note 9: The first letter “S” identifies the part as a switched capacitor converter. The next two numbers are the device number: “01” for a LM2660 device, and “02”
for a LM2661 device. The fourth letter “A” indicates the grade. Only one grade is available. Larger quantity reels are available upon request.
5 www.national.com

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LM2660MM arduino
Physical Dimensions inches (millimeters) unless otherwise noted
8-Lead SO (M)
Order Number LM2660M or LM2661M
NS Package Number M08A
11 www.national.com

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