Features Line regulation of 0.04%/V Load regulation of 0.01%/mA Output voltage tolerances of ±2% at Tj = 25°C and ±4% over the temperature range (LM140LA) ±3% over the temperature range (LM340LA) Output current of 100 mA Internal thermal overload protection Output transistor safe area protection Internal short circuit current limit Available in metal TO-39 low profile package (LM140LA/LM340LA) and plastic TO-92 (LM340LA) Description The LM140L series of three terminal positive regulators is available with several fixed output voltages making them useful in a wide range of applications. The LM140LA is an improved version of the LM78LXX series with a tighter output voltage tolerance (specified over the full military temperature range), higher ripple rejection, better regulation and lower quiescent current. The LM140LA regulators have ±2% VOUT specification, 0.04%/V line regulation, and 0.01%/mA load regulation. When used as a zener diode/resistor combination replacement, the LM140LA usually results in an effective output impedance improvement of two orders of magnitude, and lower quiescent current. These regulators can provide local on card regulation, eliminating the distribution problems associated with single point regulation. The voltages available allow the LM140LA to be used in logic systems, instrumentation, Hi-Fi, and other solid state electronic equipment. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents. The LM140LA/LM340LA are available in the low profile metal three lead TO-39 (H) and the LM340LA are also available in the plastic TO-92 (Z). With adequate heat sinking the regulator can deliver 100 mA output current. Current limiting is included to limit the peak output current to a safe value. Safe area protection for the output transistor is provided to limit internal power dissipation. If internal power dissipation becomes too high for the heat sinking provided, the thermal shut-down circuit takes over, preventing the IC from overheating. For applications requiring other voltages, see LM117L Data Sheet.

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

Datasheets

Title		Size	Date	Other Language
	LM140L Series 3-Terminal Positive Regulators	618 Kbytes	19-Jul-05

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM140LAH-12/NOPB LM140LAH-12 RoHS Status	TO-39	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 513 AVNET-EM Worldwide 137 DIGI-KEY Worldwide 867 FARNELL Europe and Asia 374 MOUSER Worldwide 364 TAYLOR Americas 638	$5.21 each at 1K+ pcs	box of 500
LM140LAH-15/NOPB LM140LAH-15 RoHS Status	TO-39	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 716 AVNET-EM Worldwide 86 MOUSER Worldwide 500 TAYLOR Americas 716	$5.21 each at 1K+ pcs	box of 500
LM140LAH-5.0/NOPB LM140LAH-5.0 RoHS Status	TO-39	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 323 AVNET-EM Worldwide 371 DIGI-KEY Worldwide 583 TAYLOR Americas 599	$5.21 each at 1K+ pcs	box of 500

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM140LAH-15-MLS	NONE	NONE	08 Sep 1998
LM140LAH5.0-MLS	NONE	NONE	08 Sep 1998

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 LM140L.

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 LM140L 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
LM140LAH-12/NOPB LM140LAH-12	1032.657 1032.657	TO-39	3	1 1	NA NA	Detail	N/A	N/A	NSZXYTTE# LM140LAH-12
LM140LAH-15/NOPB LM140LAH-15	1032.657 1032.657	TO-39	3	1 1	NA NA	Detail	N/A	N/A	NSZXYTTE# LM140LAH-15
LM140LAH-5.0/NOPB LM140LAH-5.0	1032.657 1032.657	TO-39	3	1 1	NA NA	Detail	N/A	N/A	NSZXYTTE# LM140LAH-5.0

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 LM140L.

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 LM140L is located at RoHS Status.

CAD Symbols and Models N/A

Models N/A

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM140LAH-15-MLS	NONE	NONE	08 Sep 1998
LM140LAH5.0-MLS	NONE	NONE	08 Sep 1998