Features Output voltage adjustable from -1.2V to -37V 1.5A output current guaranteed, -55°C to +150°C Line regulation typically 0.01%/V Load regulation typically 0.3% Excellent thermal regulation, 0.002%/W 77 dB ripple rejection Excellent rejection of thermal transients 50 ppm/°C temperature coefficient Temperature-independent current limit Internal thermal overload protection P+ Product Enhancement tested Standard 3-lead transistor package Output is short circuit protected LM137 Series Packages and Power Capability     Rated Design Device Package Power Load     Dissipation Current LM137/337 TO-3 (K) 20W 1.5A   TO-39 (H) 2W 0.5A LM337 TO-220 (T) 15W 1.5A LM337 SOT-223 (MP) 2W 1A Description The LM137/LM337 are adjustable 3-terminal negative voltage regulators capable of supplying in excess of -1.5A over an output voltage range of -1.2V to -37V. These regulators are exceptionally easy to apply, requiring only 2 external resistors to set the output voltage and 1 output capacitor for frequency compensation. The circuit design has been optimized for excellent regulation and low thermal transients. Further, the LM137 series features internal current limiting, thermal shutdown and safe-area compensation, making them virtually blowout-proof against overloads. The LM137/LM337 serve a wide variety of applications including local on-card regulation, programmable-output voltage regulation or precision current regulation. The LM137/LM337 are ideal complements to the LM117/LM317 adjustable positive regulators.

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Datasheet

Title		Size	Date	Other Language
	LM137/LM337 3-Terminal Adjustable Negative Regulators	836 Kbytes	9-Nov-04	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-247: Application Note 247 Using the ADC0808/ADC0809 8-Bit µP Compatible A/D Converters with 8-Channel Analog Multiplexer	547 Kbytes	3-Oct-02
	AN-258: Application Note 258 Data Acquisition Using the ADC0816 and ADC0817 8-Bit A/D Converter with On-Chip 16 Channel Multiplexer	683 Kbytes	4-Oct-04

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	AN-1428: Application Note 1428 LM3370 Evaluation Board	11933 Kbytes	9-Jan-08	中文
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	AN-272: Application Note 272 Op Amp Booster Designs	382 Kbytes	2-Oct-02
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	AN-C: Application Note C V/F Converter ICs Handle Frequency-to-Voltage Needs	187 Kbytes	3-Oct-02
	AN-D: Application Note D Versatile Monolithic V/Fs can Compute as Well as Convert with High Accuracy	248 Kbytes	3-Oct-02
	AN-288: Application Note 288 System-Oriented DC-DC Conversion Techniques	405 Kbytes	3-Oct-02
	AN-275: Application Note 275 CMOS D/A Converters Match Most Microprocessors	127 Kbytes	2-May-04
	AN-247: Application Note 247 Using the ADC0808/ADC0809 8-Bit µP Compatible A/D Converters with 8-Channel Analog Multiplexer	547 Kbytes	3-Oct-02
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	AN-258: Application Note 258 Data Acquisition Using the ADC0816 and ADC0817 8-Bit A/D Converter with On-Chip 16 Channel Multiplexer	683 Kbytes	4-Oct-04
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	AN-210: Application Note 210 New Phase-Locked-Loops Have Advantages as Frequency to Voltage Converters (and more)	339 Kbytes	3-Oct-02
	AN-301: Application Note 301 Signal Conditioning for Sophisticated Transducers	579 Kbytes	2-Oct-02

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LM337IMP/NOPB LM337IMP RoHS		Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 728 AVNET-EM Worldwide 2000 DIGIKEY Worldwide 5362 FARNELL Europe and Asia 2574 FUTURE Worldwide 1100 KEIKONG Asia Pacific 2000 NEWARK Americas 2704 TAYLOR Americas 980 TECHMOSA Asia Pacific 2000	$0.70 each at 1K+ pcs	reel of 1000
LM337IMPX/NOPB LM337IMPX RoHS		Full production Lead Time: 12 weeks	Distributor Region Qty ARROW Worldwide 1600 DIGIKEY Worldwide 0	$0.70 each at 1K+ pcs	reel of 2000
LM337T/NOPB LM337T RoHS		Full production Lead Time: 12 weeks	Distributor Region Qty ARROW Worldwide 1919 AVNET-EM Worldwide 7 BRITESTONE South Korea 34 DIGIKEY Worldwide 1026 FARNELL Europe and Asia 6191 FUTURE Worldwide 1100 NEWARK Americas 477 ROCELEC Americas 1 RS COMPONENTS Worldwide 1585 TAYLOR Americas 24457	$0.78 each at 1K+ pcs	rail of 45
LM337H/NOPB LM337H RoHS		Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 188 AVNET-EM Worldwide 799 DIGIKEY Worldwide 0 FUTURE Worldwide 142	$5.53 each at 1K+ pcs	box of 500
LM337K STEEL/NOPB LM337K STEEL RoHS		Lifetime buy Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 15 DIGIKEY Worldwide 1 FARNELL Europe and Asia 89	$23.80 each at 250+ pcs	tray of 50
LM337K MWC RoHS		Lifetime buy Lead Time: 6 weeks	Contact your distributor	CALL	wafer jar of N/A

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM337H MWC	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM337HVH	LM137HVH/883	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM337HVK STEEL	LM137K/883	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM337K MWC	LM137KG MD8	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM337K STEEL	LM137K/883	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM337L MDC	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM337LBL	LM337LM	NATIONAL SEMICONDUCTOR	05 Mar 2008

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM337IMP	SLM	0	44046	0	0	3532500	1	1002356520
LM337IMPX	SLM	0	44046	0	0	3532500	1	1002356520
LM337T	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.

For more information on Reliability Metrics, please click here.

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM337H MWC	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM337HVH	LM137HVH/883	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM337HVK STEEL	LM137K/883	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM337K MWC	LM137KG MD8	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM337K STEEL	LM137K/883	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM337L MDC	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM337LBL	LM337LM	NATIONAL SEMICONDUCTOR	05 Mar 2008