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.

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

Datasheets

Title		Size	Date	Other Language
	LM137 3-Terminal Adjustable Negative Regulator	836 Kbytes	9-Nov-04

Application Notes

Title		Size	Date	Other Language
	AN-182: Application Note 182 Inproving Power Supply Reliability with IC Power Regulators	27 Kbytes	3-Oct-02

Other Technical Documents

Title		Type	Date
	A New Production Technique for Trimming Voltage Regulators	App Note	2002-10-03

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM137H/NOPB LM137H RoHS Status	TO-39	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 466 AVNET-EM Worldwide 89 DIGI-KEY Worldwide 951 MOUSER Worldwide 486 TAYLOR Americas 380	$6.60 each at 1K+ pcs	box of 500

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM137AH/883	LM137H/883	NATIONAL SEMICONDUCTOR	07 Jun 2005
LM137AK/883	NONE	NONE	07 Jun 2001
LM137H-MLS	NONE	NONE	08 Dec 1998
LM137H-MPR	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM137H-SMD	LM137H/883	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM137H MDS	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137H MW8	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137HVH-MLS	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137HVH-SMD	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137HVH MD8	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137HVH MW8	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137HVK-SMD	LM137HVK/883	NATIONAL SEMICONDUCTOR	05 Mar 2008
LM137HVK/883	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137K-SMD	JL137BYA	NATIONAL SEMICONDUCTOR	05 Mar 2008
LM137KG MDA	LM137HBK MD8	NATIONAL SEMICONDUCTOR	09 Dec 2005
LM137KG MWA	LM137HBK MD8	NATIONAL SEMICONDUCTOR	09 Dec 2005
LM137KPQMLV	JL137SYA	NATIONAL SEMICONDUCTOR	06 Dec 2005
LM137WG-QMLV	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137WGPQMLV	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137WG/883	LM137H/883	NATIONAL SEMICONDUCTOR	03 Dec 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 LM137.

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 LM137 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
LM137H/NOPB LM137H	1032.657 1032.657	TO-39	3	1 1	NA NA	Detail	Download	N/A	NSZXYTTE# LM137HP+

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 LM137.

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 LM137 is located at RoHS Status.

CAD Symbols and Models Download LM137 CAD Symbols

Models N/A

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM137AH/883	LM137H/883	NATIONAL SEMICONDUCTOR	07 Jun 2005
LM137AK/883	NONE	NONE	07 Jun 2001
LM137H-MLS	NONE	NONE	08 Dec 1998
LM137H-MPR	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM137H-SMD	LM137H/883	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM137H MDS	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137H MW8	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137HVH-MLS	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137HVH-SMD	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137HVH MD8	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137HVH MW8	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137HVK-SMD	LM137HVK/883	NATIONAL SEMICONDUCTOR	05 Mar 2008
LM137HVK/883	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137K-SMD	JL137BYA	NATIONAL SEMICONDUCTOR	05 Mar 2008
LM137KG MDA	LM137HBK MD8	NATIONAL SEMICONDUCTOR	09 Dec 2005
LM137KG MWA	LM137HBK MD8	NATIONAL SEMICONDUCTOR	09 Dec 2005
LM137KPQMLV	JL137SYA	NATIONAL SEMICONDUCTOR	06 Dec 2005
LM137WG-QMLV	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137WGPQMLV	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM137WG/883	LM137H/883	NATIONAL SEMICONDUCTOR	03 Dec 2008