Features Inverts or doubles input supply voltage Narrow SO-8 and Mini SO-8 Package 6.5Ω typical output resistance 88% typical conversion efficiency at 100 mA Selectable oscillator frequency: 10 kHz/80 kHz Optional external oscillator input Description The LM2660 CMOS charge-pump voltage converter is a versatile unregulated switched capacitor inverter or doubler. Operating from a wide 1.5V to 5.5V supply voltage, the LM2660 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 provides ideal performance for battery-powered systems. LM2660 devices can be operated directly in parallel to lower output impedance, thus providing more current at a given voltage. The FC (frequency control) pin selects between a nominal 10 kHz or 80 kHz oscillator frequency. 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 LM2660 with an external clock up to 150 kHz. Through these methods, output ripple frequency and harmonics may be controlled. Additionally, the LM2660 may be configured to divide a positive input voltage precisely in half. In this mode, input voltages as high as 11V may be used. Applications Laptop computers Cellular phones Medical instruments Operational amplifier power supplies Interface power supplies Handheld instruments

Typical Application *click for larger image	Connection Diagram click for larger image
Typical Performance click for larger image

Datasheets

Title		Size	Date	Other Language
	LM2660 Switched Capacitor Voltage Converter	357 Kbytes	24-Jan-12	日本語

Other Technical Documents

Title		Type	Date
	Using the LM2660 and LP2986 to Generate a Regulated Negative Output Voltage	App Note	2007-03-21

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM2660M/NOPB LM2660M RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 80 AVNET-EM Worldwide 413 DIGI-KEY Worldwide 609 FARNELL Europe and Asia 1564 MOUSER Worldwide 804 NEWARK Americas 138 TAYLOR Americas 1410	$0.65 each at 1K+ pcs	rail of 95
LM2660MM/NOPB LM2660MM RoHS Status	MINI SOIC	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 1000 DIGI-KEY Worldwide 0 MOUSER Worldwide 900	$0.65 each at 1K+ pcs	reel of 1000
LM2660MX/NOPB LM2660MX RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 10000 AVNET-EM Worldwide 7369 DIGI-KEY Worldwide 0 MOUSER Worldwide 3196 TAYLOR Americas 10000	$0.65 each at 1K+ pcs	reel of 2500

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM2660MMX	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM2660.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM2660 is located at RoHS Status.

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM2660M/NOPB LM2660M	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	Download	N/A	NSZXTT LM26 60M
LM2660MM/NOPB LM2660MM	29.851 30.002	MINI SOIC	8	1 1	260 260	Detail	Download	N/A	ZXTT S01A
LM2660MX/NOPB LM2660MX	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	Download	N/A	NSZXTT LM26 60M

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM2660.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM2660 is located at RoHS Status.

CAD Symbols and Models Download LM2660 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM2660M	ABCD150	0	42680	0	0	6394000	1	1814314958
LM2660MM	ABCD150	0	42680	0	0	6394000	1	1814314958
LM2660MX	ABCD150	0	42680	0	0	6394000	1	1814314958

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM2660.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM2660 is located at RoHS Status.

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM2660MMX	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008