LM340 - Series 3-Terminal Positive Regulators

LM340 - Series 3-Terminal Positive Regulators

Datasheet	Packaging	Samples & Pricing	Reliability	Application Notes	Knowledge Base

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

General 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. More...

Typical Application

click for larger image

Parameters Values

Output Current 1000 mA

Output Voltage 7.5, 12, 15, 8, 5 Volt

Input Min Voltage 7.5, 14.8, 10.5, 17.9 Volt

Input Max Voltage 35 Volt

Adjustable Output No

On/Off Pin No

Error Flag No

Temperature Min 0 deg C

Temperature Max 70, 125 deg C

RegType Linear Regulator

Typical Performance

*click for larger image

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

Additional Resources

Application Notes

Connection Diagram

*click for larger image

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LM340/LM78XX Series 3-Terminal Positive Regulators	930 Kbytes	27-Jul-06	Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.

Package Availability, Models, Samples & Pricing

Part Number

Package

Factory Lead Time

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking
Format

Type

Pins

Spec.

MSL
Rating

Peak
Reflow

RoHS
Report

CAD
Symbols

Qty

Qty

$US each

LM340MP-5.0

4

NOPB
STD

1
1

260
260

Full production

N/A

Samples

Buy Now

1K+

$0.50

reel
of
1000

6 weeks

3000

LM340MPX-5.0

4

NOPB
STD

1
1

260
260

Full production

N/A

Buy Now

1K+

$0.50

reel
of
2000

8 weeks

5000

LM7808CT

3

NOPB
STD

1
1

NA
NA

Lifetime buy

N/A

Buy Now

1K+

$0.62

rail
of
45

NSUZXYTTE#
LM7808CT

8 weeks

2000

LM340AT-5.0

3

NOPB
STD

1
1

NA
NA

Full production

N/A

Buy Now

1K+

$0.67

rail
of
45

NSUZXYTTE#
LM340AT
5.0 P+

8 weeks

5000

LM340T-12

3

NOPB
STD

1
1

NA
NA

Full production

N/A

Samples

Buy Now

1K+

$0.65

rail
of
45

NSUZXYTTE#
LM340T12
7812 P+

8 weeks

2000

LM340T-15

3

NOPB
STD

1
1

NA
NA

Full production

N/A

Samples

Buy Now

1K+

$0.65

rail
of
45

NSUZXYTTE#
LM340T15
7815 P+

8 weeks

5000

LM340T-5.0

3

NOPB
STD

1
1

NA
NA

Full production

N/A

Samples

Buy Now

1K+

$0.65

rail
of
45

NSUZXYTTE#
LM340T5
7805 P+

6 weeks

2500

LM340AS-5.0

3

NOPB
STD

3
3

245
235

Lifetime buy

N/A

Buy Now

1K+

$0.83

rail
of
45

NSUZXYTTE#
LM340AS
-5.0 P+

8 weeks

2000

LM340S-12

3

NOPB
STD

3
3

245
235

Full production

N/A

Buy Now

1K+

$0.65

rail
of
45

NSUZXYTTE#
LM340S
-12 P+

8 weeks

1000

LM340S-5.0

3

NOPB
STD

3
3

245
235

Full production

N/A

Samples

Buy Now

1K+

$0.65

rail
of
45

NSUZXYTTE#
LM340S
-5.0 P+

8 weeks

2000

LM340ASX-5.0

3

NOPB

3

245

Lifetime buy

N/A

Buy Now

1K+

$0.83

reel
of
500

NSUZXYTTE#
LM340AS
-5.0 P+

8 weeks

2000

LM340SX-12

3

NOPB
STD

3
3

245
235

Full production

N/A

Buy Now

1K+

$0.65

reel
of
500

NSUZXYTTE#
LM340S
-12 P+

8 weeks

2000

LM340SX-5.0

3

NOPB
STD

3
3

245
235

Full production

N/A

Buy Now

1K+

$0.65

reel
of
500

NSUZXYTTE#
LM340S
-5.0 P+

8 weeks

3000

LM340K-12

2

NOPB
STD

1
1

NA
NA

Lifetime buy

N/A

Buy Now

1K+

$21.90

tray
of
50

NS
ZXYTTE#
LM340K
12 7812P+

6 weeks

500

LM340K-5.0

2

NOPB
STD

1
1

NA
NA

Full production

N/A

Buy Now

1K+

$21.90

tray
of
50

NS
ZXYTTE#
LM340K
-5.0 7805P+

6 weeks

500

LM7808C MDC

Lifetime buy

N/A

tray
of
N/A

6 weeks

N/A

LM7808C MWC

Full production

N/A

wafer jar
of
N/A

N/A

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

General 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.

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM340AS-5.0	SLM	0	44046	0	0	3532500	1	1002356520
LM340ASX-5.0	SLM	0	44046	0	0	3532500	1	1002356520
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
LM7808CT	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.

Application Notes

Title	Size in Kbytes	Date
AN-103: Application Note 103 LM340 Series Three Terminal Positive Regulators	421 Kbytes	3-Oct-02	Download
AN-1529: Application Note 1529 LM3430 Evaluation Board	2770 Kbytes	21-Aug-07	Download
AN-1529 (Chinese): Application Note 1529 LM3430 Evaluation Board	789 Kbytes
AN-298: Application Note 298 Isolation Techniques for Signal Conditioning	379 Kbytes	2-Oct-02	Download
AN-181: Application Note 181 3-Terminal Regulator Is Adjustable	165 Kbytes	1-May-04	Download
AN-1148: Application Note 1148 Linear Regulators: Theory Of Operation and Compensation	200 Kbytes	10-May-04	Download
AN-1148 (Japanese): Application Note 1148 Linear Regulators: Theory Of Operation and Compensation	216 Kbytes
AN-1148 (Chinese): Application Note 1148 Linear Regulators: Theory Of Operation and Compensation	396 Kbytes
AN-127: Application Note 127 LM143 Monolithic High Voltage Operational Amplifier Applications	441 Kbytes	2-May-04	Download
AN-1192: Application Note 1192 Overture™ Series High Power Solutions	548 Kbytes	15-Jun-04	Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.

More Application Notes

Title	Size in Kbytes	Date
AN-1982: Application Note 1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool	63 Kbytes	15-Jul-09	Download
AN-1545: Application Note 1545 LM3404/LM3404HV Evaluation Board	665 Kbytes	14-Aug-09	Download
AN-1545 (Chinese): Application Note 1545 LM3404/LM3404HV Evaluation Board	493 Kbytes
AN-182: Application Note 182 Improving Power Supply Reliability with IC Power Regulators	27 Kbytes	3-Oct-02	Download
AN-1853: Application Note 1853 COT Drivers Control LED Ripple Current	158 Kbytes	23-Sep-08	Download
AN-1954: Application Note 1954 LM3409 Demonstration Board	607 Kbytes	11-Jun-09	Download
AN-1954 (Chinese): Application Note 1954 LM3409 Demonstration Board	502 Kbytes

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 8-Nov-2009]