Features • Thermal, short circuit and safe area protection • High ripple rejection • 0.5A output current • 4% tolerance on preset output voltage Description The LM79MXX series of 3-terminal regulators is available with fixed output voltages of -5V, -12V, and -15V. These devices need only one external component-a compensation capacitor at the output. The LM79MXX series is packaged in the TO-220 power package, and is capable of supplying 0.5A of output current. These regulators employ internal current limiting, safe area protection, and thermal shutdown for protection against virtually all overload conditions. Low ground pin current of the LM79MXX series allows output voltage to be easily boosted above the preset value with a resistor divider. The low quiescent current of these devices with a specified maximum change with line and load ensures good regulation in the voltage boosted mode. For output voltage other than -5V, -12V, and -15V the LM137 series provides an output voltage range from -1.2V to -57V.

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Datasheet

Title		Size	Date	Other Language
	LM79MXX Series 3-Terminal Negative Regulators	211 Kbytes	6-Sep-01

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Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LM79M05CT/NOPB LM79M05CT RoHS		Lifetime buy Lead Time: 8 weeks	Distributor Region Qty ARROW Worldwide 615 AVNET-EM Worldwide 131 DIGIKEY Worldwide 0 FARNELL Europe and Asia 1677	$0.57 each at 1K+ pcs	rail of 45

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM79M05C MWC	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM79M05CT	LM337T	NATIONAL SEMICONDUCTOR	01 Dec 2009

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM79M05CT	SLM	0	44046	0	0	3532500	1	1002356520

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.

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Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM79M05C MWC	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM79M05CT	LM337T	NATIONAL SEMICONDUCTOR	01 Dec 2009