LM1086 - 1.5A Low Dropout Positive Regulators

LM1086 - 1.5A Low Dropout Positive Regulators

Datasheet	Packaging	Samples & Pricing	Reliability	Design Tools	Application Notes	Knowledge Base

Features

Available in 1.8V, 2.5V, 2.85V, 3.3V, 3.45V, 5V and Adjustable Versions
Current Limiting and Thermal Protection

Output Current	1.5A
Line Regulation	0.015% (typical)
Load Regulation	0.1% (typical)

General Description

The LM1086 is a series of low dropout positive voltage regulators with a maximum dropout of 1.5V at 1.5A of load current. More...

Applications

•	SCSI-2 Active Terminator
•	High Efficiency Linear Regulators
•	Battery Charger
•	Post Regulation for Switching Supplies
•	Constant Current Regulator
•	Microprocessor Supply

Parameters Values

Output Current 1500 mA

Output Min 3.3, 1.25, 5, 2.5 Volt

Input Min Voltage 2.6 Volt

Input Max Voltage 27, 25, 30, 29 Volt

Dropout Voltage 1.3 Volt

Adjustable Output No

Quiescent Current 2 mA

On/Off Pin No

Error Flag No

RegType LDO

Temperature Min -40 deg C

Temperature Max 125 deg C

Output Max 3.3, 27.5, 5, 2.5 Volt

Output Voltage 3.3, 5, 2.5 Volt

Also Recommended

LP38852▲	New! National's LP38k Family Of High
LP38855▲	Performance LDOs Power Digital ICs
LP38858▲	See More At LDO.NATIONAL.COM

Additional Resources

Application Notes

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LM1086 1.5A Low Dropout Positive Regulators	822 Kbytes	6-Jun-05	Download
LM1086 1.5A Low Dropout Positive Regulators (Japanese)	318 Kbytes

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

LM1086ILD-ADJ

8

NOPB
STD

3
1

260
235

Lifetime buy

N/A

Buy Now

1K+

$0.92

reel
of
1000

NS
UZXYTT
1086IAD

8 weeks

2000

LM1086ILD-3.3

8

NOPB
STD

3
1

260
235

Full production

N/A

Buy Now

1K+

$0.92

reel
of
1000

NS
UZXYTT
1086I33

8 weeks

2000

LM1086ILDX-3.3

8

NOPB
STD

3
1

260
235

Lifetime buy

N/A

Buy Now

1K+

$0.92

reel
of
4500

NS
UZXYTT
1086I33

8 weeks

5000

LM1086ILDX-5.0

8

NOPB

3

260

Lifetime buy

N/A

Buy Now

1K+

$0.78

reel
of
4500

NS
UZXYTT
1086I50

8 weeks

5000

LM1086ILDX-ADJ

8

NOPB

3

260

Lifetime buy

N/A

Buy Now

1K+

$0.92

reel
of
4500

NS
UZXYTT
1086IAD

8 weeks

N/A

LM1086IT-1.8

3

NOPB
STD

1
1

NA
NA

Lifetime buy

N/A

Buy Now

1K+

$0.88

rail
of
45

NSUZXYTTE#
LM1086
IT-1.8

8 weeks

N/A

LM1086CT-3.3

3

NOPB
STD

1
1

NA
NA

Full production

N/A

Samples

Buy Now

1K+

$0.88

rail
of
45

NSUZXYTTE#
LM1086
CT-3.3

8 weeks

2000

LM1086CT-5.0

3

NOPB
STD

1
1

NA
NA

Full production

N/A

Samples

Buy Now

1K+

$0.88

rail
of
45

NSUZXYTTE#
LM1086
CT-5.0

8 weeks

2500

LM1086CT-ADJ

3

NOPB
STD

1
1

NA
NA

Full production

N/A

Samples

Buy Now

1K+

$0.88

rail
of
45

NSUZXYTTE#
LM1086
CT-ADJ

8 weeks

5000

LM1086IT-3.3

3

NOPB
STD

1
1

NA
NA

Full production

N/A

Samples

Buy Now

1K+

$0.88

rail
of
45

NSUZXYTTE#
LM1086
IT-3.3

8 weeks

2000

LM1086IT-5.0

3

NOPB
STD

1
1

NA
NA

Full production

N/A

Buy Now

1K+

$0.88

rail
of
45

NSUZXYTTE#
LM1086
IT-5.0

8 weeks

1000

LM1086IT-ADJ

3

NOPB
STD

1
1

NA
NA

Full production

N/A

Samples

Buy Now

1K+

$0.88

rail
of
45

NSUZXYTTE#
LM1086
IT-ADJ

8 weeks

1000

LM1086CS-2.5

3

NOPB
STD

3
3

245
235

Full production

N/A

Buy Now

1K+

$0.90

rail
of
45

NSUZXYTTE#
LM1086
CS-2.5

8 weeks

2000

LM1086CS-3.3

3

NOPB
STD

3
3

245
235

Full production

N/A

Samples

Buy Now

1K+

$0.90

rail
of
45

NSUZXYTTE#
LM1086
CS-3.3

8 weeks

1000

LM1086CS-5.0

3

NOPB
STD

3
3

245
235

Full production

N/A

Buy Now

1K+

$0.90

rail
of
45

NSUZXYTTE#
LM1086
CS-5.0

8 weeks

1000

LM1086CS-ADJ

3

NOPB
STD

3
3

245
235

Full production

N/A

Samples

Buy Now

1K+

$0.90

rail
of
45

NSUZXYTTE#
LM1086
CS-ADJ

8 weeks

1000

LM1086IS-1.8

3

NOPB
STD

3
3

245
235

Full production

N/A

Buy Now

1K+

$0.88

rail
of
45

NSUZXYTTE#
LM1086
IS-1.8

8 weeks

1000

LM1086IS-3.3

3

NOPB
STD

3
3

245
235

Full production

N/A

Samples

Buy Now

1K+

$0.88

rail
of
45

NSUZXYTTE#
LM1086
IS-3.3

8 weeks

1000

LM1086IS-5.0

3

NOPB
STD

3
3

245
235

Full production

N/A

Samples

Buy Now

1K+

$0.88

rail
of
45

NSUZXYTTE#
LM1086
IS-5.0

8 weeks

2000

LM1086IS-ADJ

3

NOPB
STD

3
3

245
235

Full production

N/A

Samples

Buy Now

1K+

$0.88

rail
of
45

NSUZXYTTE#
LM1086
IS-ADJ

8 weeks

1000

LM1086CSX-5.0

3

NOPB
STD

3
3

245
235

Lifetime buy

N/A

Buy Now

1K+

$0.90

reel
of
500

NSUZXYTTE#
LM1086
CS-5.0

8 weeks

3000

LM1086CSX-2.5

3

NOPB
STD

3
3

245
235

Full production

N/A

Buy Now

1K+

$0.90

reel
of
500

NSUZXYTTE#
LM1086
CS-2.5

8 weeks

2000

LM1086CSX-3.3

3

NOPB
STD

3
3

245
235

Full production

N/A

Buy Now

1K+

$0.90

reel
of
500

NSUZXYTTE#
LM1086
CS-3.3

8 weeks

15000

LM1086CSX-ADJ

3

NOPB
STD

3
3

245
235

Full production

N/A

Buy Now

1K+

$0.90

reel
of
500

NSUZXYTTE#
LM1086
CS-ADJ

8 weeks

1000

LM1086ISX-1.8

3

NOPB

3

245

Full production

N/A

Buy Now

1K+

$0.88

reel
of
500

NSUZXYTTE#
LM1086
IS-1.8

8 weeks

5000

LM1086ISX-3.3

3

NOPB
STD

3
3

245
235

Full production

N/A

Buy Now

1K+

$0.88

reel
of
500

NSUZXYTTE#
LM1086
IS-3.3

8 weeks

2000

LM1086ISX-5.0

3

NOPB
STD

3
3

245
235

Full production

N/A

Buy Now

1K+

$0.88

reel
of
500

NSUZXYTTE#
LM1086
IS-5.0

8 weeks

2500

LM1086ISX-ADJ

3

NOPB
STD

3
3

245
235

Full production

N/A

Buy Now

1K+

$0.88

reel
of
500

NSUZXYTTE#
LM1086
IS-ADJ

8 weeks

2000

LM1086-ADJ MDC

Full production

N/A

tray
of
N/A

N/A

N/A

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM1086CS-2.85	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM1086CSX-2.85	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM1086CSX-5.0	LM1086CS-ADJ	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM1086CT-2.85	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM1086ILD-1.8	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM1086ILD-2.5	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM1086ILD-2.85	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM1086ILD-5.0	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM1086ILD-ADJ	LM1086IS-ADJ	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM1086ILDX-2.5	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM1086ILDX-2.85	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM1086ILDX-3.3	LM1086IS-3.3	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM1086ILDX-5.0	LM1086IS-3.3	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM1086ILDX-ADJ	LM1086IS-ADJ	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM1086IS-2.85	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM1086IS-3.45	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM1086ISX-2.85	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM1086ISX-3.45	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM1086IT-1.8	LM1086ISX-1.8	NATIONAL SEMICONDUCTOR	01 Dec 2009
LM1086IT-2.85	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM1086S-3.3	NONE	NONE	06 Dec 2000
LM1086S-ADJ	NONE	NONE	06 Dec 2000
LM1086T-3.3	NONE	NONE	06 Dec 2000
LM1086T-ADJ	NONE	NONE	06 Dec 2000

General Description

The LM1086 is a series of low dropout positive voltage regulators with a maximum dropout of 1.5V at 1.5A of load current. It has the same pin-out as National Semiconductor's industry standard LM317.

The LM1086 is available in an adjustable version, which can set the output voltage with only two external resistors. It is also available in six fixed voltages: 1.8V, 2.5V, 2.85V, 3.3V, 3.45V and 5.0V. The fixed versions integrate the adjust resistors.

The LM1086 circuit includes a zener trimmed bandgap reference, current limiting and thermal shutdown.

The LM1086 series is available in TO-220, TO-263, and LLP packages. Refer to the LM1084 for the 5A version, and the LM1085 for the 3A version.

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM1086-ADJ MDC	LB300	0	33664	0	0	3830500	1	1086914834
LM1086CS-2.5	LB300	0	33664	0	0	3830500	1	1086914834
LM1086CS-2.85	LB300	0	33664	0	0	3830500	1	1086914834
LM1086CS-3.3	LB300	0	33664	0	0	3830500	1	1086914834
LM1086CS-5.0	LB300	0	33664	0	0	3830500	1	1086914834
LM1086CS-ADJ	LB300	0	33664	0	0	3830500	1	1086914834
LM1086CSX-2.5	LB300	0	33664	0	0	3830500	1	1086914834
LM1086CSX-3.3	LB300	0	33664	0	0	3830500	1	1086914834
LM1086CSX-5.0	LB300	0	33664	0	0	3830500	1	1086914834
LM1086CSX-ADJ	LB300	0	33664	0	0	3830500	1	1086914834
LM1086CT-3.3	LB300	0	33664	0	0	3830500	1	1086914834
LM1086CT-5.0	LB300	0	33664	0	0	3830500	1	1086914834
LM1086CT-ADJ	LB300	0	33664	0	0	3830500	1	1086914834
LM1086ILD-2.5	LB300	0	33664	0	0	3830500	1	1086914834
LM1086ILD-3.3	LB300	0	33664	0	0	3830500	1	1086914834
LM1086ILD-ADJ	LB300	0	33664	0	0	3830500	1	1086914834
LM1086ILDX-3.3	LB300	0	33664	0	0	3830500	1	1086914834
LM1086ILDX-5.0	LB300	0	33664	0	0	3830500	1	1086914834
LM1086ILDX-ADJ	LB300	0	33664	0	0	3830500	1	1086914834
LM1086IS-1.8	LB300	0	33664	0	0	3830500	1	1086914834
LM1086IS-3.3	LB300	0	33664	0	0	3830500	1	1086914834
LM1086IS-3.45	LB300	0	33664	0	0	3830500	1	1086914834
LM1086IS-5.0	LB300	0	33664	0	0	3830500	1	1086914834
LM1086IS-ADJ	LB300	0	33664	0	0	3830500	1	1086914834
LM1086ISX-1.8	LB300	0	33664	0	0	3830500	1	1086914834
LM1086ISX-3.3	LB300	0	33664	0	0	3830500	1	1086914834
LM1086ISX-3.45	LB300	0	33664	0	0	3830500	1	1086914834
LM1086ISX-5.0	LB300	0	33664	0	0	3830500	1	1086914834
LM1086ISX-ADJ	LB300	0	33664	0	0	3830500	1	1086914834
LM1086IT-1.8	LB300	0	33664	0	0	3830500	1	1086914834
LM1086IT-2.85	LB300	0	33664	0	0	3830500	1	1086914834
LM1086IT-3.3	LB300	0	33664	0	0	3830500	1	1086914834
LM1086IT-5.0	LB300	0	33664	0	0	3830500	1	1086914834
LM1086IT-ADJ	LB300	0	33664	0	0	3830500	1	1086914834

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.

Design Tools

Title	Size in Kbytes	Date
LM108X Qualification Package	1455 Kbytes	24-Jun-1999	View Online	Download

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

More Application Notes

Title	Size in Kbytes	Date
AN-79: Application Note 79 IC Preamplifier Challenges Choppers on Drift	380 Kbytes	1-Oct-02	Download
AN-29: Application Note 29 IC Op Amp Beats FETs on Input Current	444 Kbytes	1-Oct-02	Download
AN-241: Application Note 241 Working with High Impedance Op Amps	130 Kbytes	4-Oct-04	Download
AN-173: Application Note 173 IC Zener Eases Reference Design	54 Kbytes	1-Oct-02	Download
AN-161: Application Note 161 IC Voltage Reference has 1 ppm per Degree Drift	138 Kbytes	10-Oct-02	Download
AN-222: Application Note 222 Super Matched Bipolar Transistor Pair Sets New Standards for Drift and Noise	399 Kbytes	1-Oct-02	Download
AN-178: Application Note 178 Applications for an Adjustable IC Power Regulator	40 Kbytes	3-Oct-02	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-30: Application Note 30 Log Converters	124 Kbytes	2-Oct-02	Download
AN-41: Application Note 41 Precision IC Comparator Runs from +5V Logic Supply	150 Kbytes	2-Oct-02	Download
AN-56: 1.2 Volt Reference	116 Kbytes	4-Nov-95	Download
AN-56 (Chinese): 1.2 Volt Reference	291 Kbytes

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

[Information as of 8-Nov-2009]