Features Inverts or doubles input supply voltage Narrow SO-8 Package 6.5Ohm typical output resistance 88% typical conversion efficiency at 100 mA Selectable oscillator frequency: 10 kHz/80 kHz Description The MAX660 CMOS charge-pump voltage converter inverts a positive voltage in the range of 1.5V to 5.5V to the corresponding negative voltage. The MAX660 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 MAX660 provides ideal performance for battery powered systems. The MAX660 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 MAX660 with an external clock. A frequency control (FC) pin selects the oscillator frequency of 10 kHz or 80 kHz. Applications Laptop computers Cellular phones Medical instruments Operational amplifier power supplies Interface power supplies Handheld instruments

Also Recommended LM2660 Is Available In Mini-SO Package LM2661 Is Available In Mini-SO Package, Has Shutdown LM2662 Delivers Up To 200mA Load, Operates At Higher Frequency For Smaller Capacitors LM2663 Delivers Up To 200mA Load, Operates At Higher Frequency, Has Shutdown

Datasheets

Title		Size	Date	Other Language
	MAX660 Switched Capacitor Voltage Converter	259 Kbytes	12-Nov-99

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
MAX660M/NOPB MAX660M RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 2755 AVNET-EM Worldwide 1008 DIGI-KEY Worldwide 2750 FARNELL Europe and Asia 3161 MOUSER Worldwide 693 NEWARK Americas 309 TAYLOR Americas 2755	$0.55 each at 1K+ pcs	rail of 95
MAX660MX/NOPB MAX660MX RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 34406 AVNET-EM Worldwide 2500 DIGI-KEY Worldwide 0 MOUSER Worldwide 2209 TAYLOR Americas 14406	$0.55 each at 1K+ pcs	reel of 2500

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 MAX660.

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 MAX660 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
MAX660M/NOPB MAX660M	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	Download	N/A	NSZXTT MAX 660M
MAX660MX/NOPB MAX660MX	69.761 70.001	SOIC NARROW	8	1 1	260 235	Detail	Download	N/A	NSZXTT MAX 660M

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 MAX660.

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 MAX660 is located at RoHS Status.

CAD Symbols and Models Download MAX660 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
MAX660M	ABCD150	0	42680	0	0	6394000	1	1814314958
MAX660MX	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 MAX660.

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 MAX660 is located at RoHS Status.