LM340 - Series 3-Terminal Positive Regulators

LM340	Series 3-Terminal Positive Regulators

Overview

Diagrams

Parametrics

Documents

Order

Packaging

Tools

Reliability

Obsolete Versions

Features
Complete specifications at 1A load

Output voltage tolerances of ±2% at T_j = 25°C and ±4% over the temperature range (LM340A)

Line regulation of 0.01% of V_OUT/V of [Delta]V_IN at 1A load (LM340A)

Load regulation of 0.3% of V_OUT/A (LM340A)

Internal thermal overload protection

Internal short-circuit current limit

Output transistor safe area protection

P⁺ Product Enhancement tested

Description
The LM140/LM340A/LM340/LM78XXC monolithic 3-terminal positive voltage regulators employ internal current-limiting, thermal shutdown and safe-area compensation, making them essentially indestructible. If adequate heat sinking is provided, they can deliver over 1.0A output current. They are intended as fixed voltage regulators in a wide range of applications including local (on-card) regulation for elimination of noise and distribution problems associated with single-point regulation. In addition to use as fixed voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents.

Considerable effort was expended to make the entire series of regulators easy to use and minimize the number of external components. It is not necessary to bypass the output, although this does improve transient response. Input bypassing is needed only if the regulator is located far from the filter capacitor of the power supply.

The 5V, 12V, and 15V regulator options are available in the steel TO-3 power package. The LM340A/LM340/LM78XXC series is available in the TO-220 plastic power package, and the LM340-5.0 is available in the SOT-223 package, as well as the LM340-5.0 and LM340-12 in the surface-mount TO-263 package.

Also Recommended

LP38690▲ Lower Quiescent Current, Stable With Ceramic Output Capacitors

LP38692▲ Lower Quiescent Current, Stable With Ceramic Output Capacitors & Enable Pin

LP8340▲ Improved Dropout Voltage, Supply Current

Typical Application click for larger image

Connection Diagram *click for larger image

Typical Performance *click for larger image

Parameters / Values	LM340	LP38690	LP38692	LP8340
Output Current	1000 mA	1000 mA	1000 mA	1000 mA
Output Voltage	7.5, 12, 15, 8, 5 Volt	1.8, 5.0, 2.5, 3.3 Volt	1.8, 2.5, 3.3, 5 Volt	Undefined Volt
Input Min Voltage	7.5, 14.8, 10.5, 17.9 Volt	2.75, 3.95, 3.3, 5.45 Volt	2.95, 2.7, 5.45, 3.75 Volt	2.7 Volt
Input Max Voltage	35 Volt	10 Volt	10 Volt	10 Volt
Adjustable Output	No	No	No	Yes
On/Off Pin	No	No	Yes	No
PowerGood / Error Flag	No	No	No	No
Temperature Min	0 deg C	-40 deg C	-40 deg C	0 deg C
Temperature Max	70, 125 deg C	125 deg C	125 deg C	125 deg C
RegType	Linear Regulator	LDO	LDO	LDO

Datasheets
Title Size Date Other
Language

LM340 Series 3-Terminal Positive Regulators 930
Kbytes 27-Jul-06

Application Notes
Title Size Date Other
Language

AN-103: Application Note 103 LM340 Series Three Terminal Positive Regulators 421
Kbytes 3-Oct-02

AN-1148: Application Note 1148 Linear Regulators: Theory Of Operation and Compensation 200
Kbytes 10-May-04 日本語
 中文

AN-222: Application Note 222 Super Matched Bipolar Transistor Pair Sets New Standards for Drift and Noise 399
Kbytes 1-Oct-02

AN-256: Application Note 256 Circuitry for Inexpensive Relative Humidity Measurement 119
Kbytes 2-Oct-02

AN-298: Application Note 298 Isolation Techniques for Signal Conditioning 379
Kbytes 2-Oct-02

AN-181: Application Note 181 3-Terminal Regulator is Adjustable 165
Kbytes 1-May-04

AN-182: Application Note 182 Inproving Power Supply Reliability with IC Power Regulators 27
Kbytes 3-Oct-02

AN-127: Application Note 127 LM 143 Monolithic High Voltage Operational Amplifier Applications 441
Kbytes 2-May-04

Other Technical Documents
Title Type Date

Then, Now and Beyond – Systems Design in the 21st Century External Article 2008-10-02
Using a strain-gauge transducer in a Wheatstone-bridge configuration External Article 2007-10-11
Wide Adjustable Range PNP Voltage Regulator App Note 2002-10-03
A User's Guide to Compensating Low-Dropout Regulators App Note 2007-03-21

Part Number(s)
(NSID)

Top View

Availability

Current Reported Stock

Budgetary Pricing

Pack
Size

LM340AT-5.0/NOPB

LM340AT-5.0

RoHS Status

TO-220

Full production
Lead Time: 6 weeks

Distributor	Region	Qty
ARROW	Worldwide	2206
AVNET-EM	Worldwide	1945
CEAC	Asia Pacific	720
DIGI-KEY	Worldwide	3619
MOUSER	Worldwide	709
NEWARK	Americas	1212
RS COMPONENTS	Worldwide	150
TAYLOR	Americas	2206

$0.61 each at 1K+ pcs

rail
of
45

LM340MP-5.0/NOPB

LM340MP-5.0

RoHS Status

SOT-223

Full production
Lead Time: 6 weeks

Distributor	Region	Qty
ARROW	Worldwide	921
AVNET-EM	Worldwide	3038
DIGI-KEY	Worldwide	51
MOUSER	Worldwide	139
TAYLOR	Americas	19752

$0.46 each at 1K+ pcs

reel
of
1000

LM340MPX-5.0/NOPB

LM340MPX-5.0

RoHS Status

SOT-223

Full production
Lead Time: 16 weeks

Distributor	Region	Qty
ARROW	Worldwide	3000
DIGI-KEY	Worldwide	0
MOUSER	Worldwide	1716
TAYLOR	Americas	3000

$0.46 each at 1K+ pcs

reel
of
2000

LM340S-12/NOPB

LM340S-12

RoHS Status

TO-263

Full production
Lead Time: 6 weeks

Distributor	Region	Qty
ARROW	Worldwide	69
AVNET-EM	Worldwide	55
DIGI-KEY	Worldwide	637
FARNELL	Europe and Asia	1078
MOUSER	Worldwide	605
NEWARK	Americas	1
RS COMPONENTS	Worldwide	295
TAYLOR	Americas	630

$0.59 each at 1K+ pcs

rail
of
45

LM340S-5.0/NOPB

LM340S-5.0

RoHS Status

TO-263

Full production
Lead Time: 6 weeks

Distributor	Region	Qty
ARROW	Worldwide	1952
AVNET-EM	Worldwide	197
BRITESTONE	South Korea	2
DIGI-KEY	Worldwide	3812
MOUSER	Worldwide	222
NEWARK	Americas	898
RS COMPONENTS	Worldwide	645
TAYLOR	Americas	3358

$0.59 each at 1K+ pcs

rail
of
45

LM340SX-12/NOPB

LM340SX-12

RoHS Status

TO-263

Full production
Lead Time: 6 weeks

Distributor	Region	Qty
ARROW	Worldwide	1500
AVNET-EM	Worldwide	3500
DIGI-KEY	Worldwide	0
MOUSER	Worldwide	970
TAYLOR	Americas	1500

$0.59 each at 1K+ pcs

reel
of
500

LM340SX-5.0/NOPB

LM340SX-5.0

RoHS Status

TO-263

Full production
Lead Time: 6 weeks

Distributor	Region	Qty
ARROW	Worldwide	1320
AVNET-EM	Worldwide	2500
DIGI-KEY	Worldwide	3500
MOUSER	Worldwide	996
NEWARK	Americas	42
TAYLOR	Americas	2520
TECHMOSA	Asia Pacific	3000

$0.59 each at 1K+ pcs

reel
of
500

LM340T-12/NOPB

LM340T-12

RoHS Status

TO-220

Full production
Lead Time: 6 weeks

Distributor	Region	Qty
ARROW	Worldwide	2142
AVNET-EM	Worldwide	202
BRITESTONE	South Korea	530
DIGI-KEY	Worldwide	2377
FARNELL	Europe and Asia	1026
MOUSER	Worldwide	1388
NEWARK	Americas	815
RS COMPONENTS	Worldwide	195
RSL MICRO	Asia Pacific	810
TAYLOR	Americas	5626

$0.59 each at 1K+ pcs

rail
of
45

LM340T-15/NOPB

LM340T-15

RoHS Status

TO-220

Full production
Lead Time: 6 weeks

Distributor	Region	Qty
ARROW	Worldwide	1453
DIGI-KEY	Worldwide	968
FARNELL	Europe and Asia	6305
MOUSER	Worldwide	1839
RS COMPONENTS	Worldwide	5
TAYLOR	Americas	5315

$0.59 each at 1K+ pcs

rail
of
45

LM340T-5.0/NOPB

LM340T-5.0

RoHS Status

TO-220

Full production
Lead Time: 6 weeks

Distributor	Region	Qty
ARROW	Worldwide	1810
AVNET-EM	Worldwide	249
BRITESTONE	South Korea	207
DIGI-KEY	Worldwide	11449
MOUSER	Worldwide	2538
NEWARK	Americas	2173
RS COMPONENTS	Worldwide	205
TAYLOR	Americas	19420

$0.59 each at 1K+ pcs

rail
of
45

LM340K-5.0/NOPB

LM340K-5.0

RoHS Status

TO-3

Full production
Lead Time: 6 weeks

Distributor	Region	Qty
AVNET-EM	Worldwide	35
DIGI-KEY	Worldwide	89
MOUSER	Worldwide	20
TAYLOR	Americas	2

$21.90 each at 1K+ pcs

tray
of
50

LM7808C MWC

RoHS Status

Full production
Lead Time: N/A

Contact your distributor

CALL

wafer jar
of
N/A

Obsolete Versions

Obsolete Part Alternate Part or Supplier Source Last Time Buy Date

LM340AK-5.0
NONE
NONE
08 Sep 1999

LM340AS-5.0
LM340AT-5.0
NATIONAL SEMICONDUCTOR
01 Dec 2009

LM340ASX-5.0
LM340AT-5.0
NATIONAL SEMICONDUCTOR
01 Dec 2009

LM340AT-12
NONE
NONE
06 Sep 2000

LM340AT-15
NONE
NONE
06 Sep 2000

LM340K-12
LM140K-12
NATIONAL SEMICONDUCTOR
01 Dec 2009

LM340K-15
LM117 STEEL
NSCE
03 Dec 2008

LM340LAH-12
LM140H-12/883
NATIONAL SEMICONDUCTOR
03 Dec 2008

LM340LAH-15
NONE
NONE
08 Sep 1999

LM340LAH-5.0
LM140H-5.0/883
NATIONAL SEMICONDUCTOR
03 Dec 2008

LM340LAZ-12
NONE
NATIONAL SEMICONDUCTOR
16 Nov 2008

LM340LAZ-15
NONE
NATIONAL SEMICONDUCTOR
16 Nov 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 LM340.

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 LM340 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
LM340AT-5.0/NOPB LM340AT-5.0	1992.315 1993.446	TO-220	3	1 1	NA NA	Detail	Download	N/A	NSUZXYTTE# LM340AT 5.0 P+
LM340MP-5.0/NOPB LM340MP-5.0	120.611 121.002	SOT-223	4	1 1	260 260	Detail	Download	N/A	XYTT N00A
LM340MPX-5.0/NOPB LM340MPX-5.0	120.612 121.002	SOT-223	4	1 1	260 260	Detail	Download	N/A	XYTT N00A
LM340S-12/NOPB LM340S-12	1289.225 1289.976	TO-263	3	3 3	245 235	Detail	Download	N/A	NSUZXYTTE# LM340S -12 P+
LM340S-5.0/NOPB LM340S-5.0	1289.225 1289.976	TO-263	3	3 3	245 235	Detail	Download	N/A	NSUZXYTTE# LM340S -5.0 P+
LM340SX-12/NOPB LM340SX-12	1289.225 1289.976	TO-263	3	3 3	245 235	Detail	Download	N/A	NSUZXYTTE# LM340S -12 P+
LM340SX-5.0/NOPB LM340SX-5.0	1289.225 1289.976	TO-263	3	3 3	245 235	Detail	Download	N/A	NSUZXYTTE# LM340S -5.0 P+
LM340T-12/NOPB LM340T-12	1991.806 1993.446	TO-220	3	1 1	NA NA	Detail	Download	N/A	NSUZXYTTE# LM340T12 7812 P+
LM340T-15/NOPB LM340T-15	1991.806 1993.446	TO-220	3	1 1	NA NA	Detail	Download	N/A	NSUZXYTTE# LM340T15 7815 P+
LM340T-5.0/NOPB LM340T-5.0	1992.315 1993.446	TO-220	3	1 1	NA NA	Detail	Download	N/A	NSUZXYTTE# LM340T5 7805 P+
LM340K-5.0/NOPB LM340K-5.0	12405.316 12405.866	TO-3	2	1 1	NA NA	Detail	Download	N/A	NS ZXYTTE# LM340K -5.0 7805P+
LM7808C MWC	22400	Wafer				N/A	-

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 LM340.

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 LM340 is located at RoHS Status.

CAD Symbols and Models
Download LM340 CAD Symbols

Models
N/A

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)

LM340AT-5.0 SLM 0 44046 0 0 3532500 1 1002356520

LM340MP-5.0 SLM 0 44046 0 0 3532500 1 1002356520

LM340MPX-5.0 SLM 0 44046 0 0 3532500 1 1002356520

LM340S-12 SLM 0 44046 0 0 3532500 1 1002356520

LM340S-5.0 SLM 0 44046 0 0 3532500 1 1002356520

LM340SX-12 SLM 0 44046 0 0 3532500 1 1002356520

LM340SX-5.0 SLM 0 44046 0 0 3532500 1 1002356520

LM340T-12 SLM 0 44046 0 0 3532500 1 1002356520

LM340T-15 SLM 0 44046 0 0 3532500 1 1002356520

LM340T-5.0 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.

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 LM340.

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 LM340 is located at RoHS Status.

[Information as of 9-Feb-2012]

For technical questions regarding TI and National Semiconductor products:

TI E2E™ Community (engineer-to-engineer online forums where you can ask questions to your fellow engineers and TI experts, as well as search for similar questions/answers)
TI Product Information Center (TI's email/phone support hotline for your region of the world)

Sign-on to save and manage products in your MyBriefcase, order free samples, create WEBENCH designs in minutes, and set your personal preferences.