LM3880 - Power Sequencer

LM3880 - Power Sequencer

Datasheet	Packaging	Samples & Pricing	Eval. Boards	Reliability	Application Notes	Knowledge Base

Features

•	Easiest method to sequence rails
•	Power up and power down control
•	Input voltage range of 2.7V to 5.5V
•	Small footprint SOT23-6
•	Low quiescent current of 25 µA
•	Standard timing options available
•	Customization of timing and sequence available through factory programmability
•	LM3880Q is AEC-Q100 Grade 1 qualified and is manufactured on an Automotive Grade Flow

General Description

The LM3880 Power Sequencer offers the easiest method to control power up and power down of multiple power supplies (switchers or linear regulators). More...

Applications

•	Multiple supply sequencing
•	Microprocessor / Microcontroller sequencing
•	FPGA sequencing
•	Automotive

Typical Application

click for larger image

Parameters Values

Input Min Voltage 2.7 Volt

Input Max Voltage 5.5 Volt

Number of Regulators Able to Sequence 3

Power Down Yes

Power Up Yes

Ability to Cascade Yes

On/Off Pin Yes

RegType Sequencer

Temperature Max 125 deg C

Temperature Min -40 deg C

AEC Q-100 Automotive Grade 1

Automotive Yes

Typical Performance

click for larger image

Also Recommended

Timing Cap

Additional Resources

Application Notes

Block Diagram

click for larger image

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LM3880/LM3880Q Power Sequencer	285 Kbytes	1-May-08	Download
LM3880/LM3880Q Power Sequencer (Japanese)	322 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

LM3880EVAL

Power Sequencer

Full production

N/A

Buy Now

1+

$30.00

1

8 weeks

N/A

LM3880QMFE-1AA

6

NOPB

1

260

Full production

N/A

Samples

Buy Now

500+

$0.86

reel
of
250

8 weeks

N/A

LM3880QMFE-1AB

6

NOPB

1

260

Full production

N/A

Samples

Buy Now

500+

$0.86

reel
of
250

8 weeks

N/A

LM3880QMFE-1AC

6

NOPB

1

260

Full production

N/A

Samples

Buy Now

500+

$0.86

reel
of
250

8 weeks

N/A

LM3880QMFE-1AD

6

NOPB

1

260

Full production

N/A

Samples

Buy Now

500+

$0.86

reel
of
250

8 weeks

N/A

LM3880QMFE-1AE

6

NOPB

1

260

Full production

N/A

Samples

Buy Now

500+

$0.86

reel
of
250

8 weeks

N/A

LM3880MFE-1AA

6

NOPB

1

260

Full production

N/A

Buy Now

500+

$0.56

reel
of
250

6 weeks

500

LM3880MFE-1AB

6

NOPB

1

260

Full production

N/A

Buy Now

500+

$0.56

reel
of
250

8 weeks

N/A

LM3880MFE-1AC

6

NOPB

1

260

Full production

N/A

Buy Now

500+

$0.56

reel
of
250

8 weeks

N/A

LM3880MFE-1AD

6

NOPB

1

260

Full production

N/A

Buy Now

500+

$0.56

reel
of
250

8 weeks

1000

LM3880MFE-1AE

6

NOPB

1

260

Full production

N/A

Buy Now

500+

$0.56

reel
of
250

8 weeks

500

LM3880MF-1AE

6

NOPB

1

260

Full production

N/A

Samples

Buy Now

1K+

$0.50

reel
of
1000

8 weeks

N/A

LM3880QMF-1AA

6

NOPB

1

260

Full production

N/A

Buy Now

1K+

$0.77

reel
of
1000

8 weeks

N/A

LM3880QMF-1AB

6

NOPB

1

260

Full production

N/A

Buy Now

1K+

$0.77

reel
of
1000

8 weeks

N/A

LM3880QMF-1AC

6

NOPB

1

260

Full production

N/A

Buy Now

1K+

$0.77

reel
of
1000

8 weeks

N/A

LM3880QMF-1AD

6

NOPB

1

260

Full production

N/A

Buy Now

1K+

$0.77

reel
of
1000

8 weeks

N/A

LM3880QMF-1AE

6

NOPB

1

260

Full production

N/A

Buy Now

1K+

$0.77

reel
of
1000

8 weeks

N/A

LM3880MF-1AA

6

NOPB

1

260

Full production

N/A

Samples

Buy Now

1K+

$0.50

reel
of
1000

8 weeks

2000

LM3880MF-1AB

6

NOPB

1

260

Full production

N/A

Samples

Buy Now

1K+

$0.50

reel
of
1000

8 weeks

2000

LM3880MF-1AC

6

NOPB

1

260

Full production

N/A

Samples

Buy Now

1K+

$0.50

reel
of
1000

8 weeks

2000

LM3880MF-1AD

6

NOPB

1

260

Full production

N/A

Samples

Buy Now

1K+

$0.50

reel
of
1000

8 weeks

1000

LM3880MFX-1AE

6

NOPB

1

260

Full production

N/A

Buy Now

1K+

$0.50

reel
of
3000

8 weeks

N/A

LM3880QMFX-1AA

6

NOPB

1

260

Full production

N/A

Buy Now

1K+

$0.77

reel
of
3000

8 weeks

N/A

LM3880QMFX-1AB

6

NOPB

1

260

Full production

N/A

Buy Now

1K+

$0.77

reel
of
3000

8 weeks

N/A

LM3880QMFX-1AC

6

NOPB

1

260

Full production

N/A

Buy Now

1K+

$0.77

reel
of
3000

8 weeks

N/A

LM3880QMFX-1AD

6

NOPB

1

260

Full production

N/A

Buy Now

1K+

$0.77

reel
of
3000

8 weeks

N/A

LM3880QMFX-1AE

6

NOPB

1

260

Full production

N/A

Buy Now

1K+

$0.77

reel
of
3000

8 weeks

N/A

LM3880MFX-1AA

6

NOPB

1

260

Full production

N/A

Buy Now

1K+

$0.50

reel
of
3000

8 weeks

5000

LM3880MFX-1AB

6

NOPB

1

260

Full production

N/A

Buy Now

1K+

$0.50

reel
of
3000

8 weeks

N/A

LM3880MFX-1AC

6

NOPB

1

260

Full production

N/A

Buy Now

1K+

$0.50

reel
of
3000

8 weeks

N/A

LM3880MFX-1AD

6

NOPB

1

260

Full production

N/A

Buy Now

1K+

$0.50

reel
of
3000

8 weeks

N/A

General Description

The LM3880 Power Sequencer offers the easiest method to control power up and power down of multiple power supplies (switchers or linear regulators). By staggering the startup sequence, it is possible to avoid latch conditions or large in-rush currents that can affect the reliability of the system.

Available in a SOT23-6 package, the Power Sequencer contains a precision enable pin and three open drain output flags. Upon enabling the LM3880 the three output flags will sequentially release, after individual time delays, permitting the connected power supplies to startup. The output flags will follow a reverse sequence during power down to avoid latch conditions.

EPROM capability allows every delay and sequence to be fully adjustable. Contact National Semiconductor if a non-standard configuration is required.

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM3880MF-1AA	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880MF-1AB	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880MF-1AC	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880MF-1AD	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880MF-1AE	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880MFE-1AA	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880MFE-1AB	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880MFE-1AC	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880MFE-1AD	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880MFE-1AE	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880MFX-1AA	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880MFX-1AB	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880MFX-1AC	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880MFX-1AD	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880MFX-1AE	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880QMF-1AA	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880QMF-1AB	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880QMF-1AC	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880QMF-1AD	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880QMF-1AE	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880QMFE-1AA	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880QMFE-1AB	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880QMFE-1AC	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880QMFE-1AD	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880QMFE-1AE	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880QMFX-1AA	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880QMFX-1AB	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880QMFX-1AC	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880QMFX-1AD	CMOS7	0	18406	0	0	1089000	4	309006723
LM3880QMFX-1AE	CMOS7	0	18406	0	0	1089000	4	309006723

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-1491: Application Note 1491 LM3880 Power Sequencer Demo Board	1703 Kbytes	30-Nov-06	Download
AN-1677: Application Note 1677 LM1771 and LM3880 Based FPGA Power Supply Reference Design	177 Kbytes	14-Jan-08	Download
AN-1603: Application Note 1603 LM274X Reference Designs	431 Kbytes	6-Dec-07	Download
AN-1603 (Chinese): Application Note 1603 LM274X Reference Designs	482 Kbytes

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

More Application Notes

Title	Size in Kbytes	Date
AN-1192: Application Note 1192 Overture™ Series High Power Solutions	548 Kbytes	15-Jun-04	Download
AN-1785: Application Note 1785 LM3881 Power Sequencer Evaluation Board	614 Kbytes	27-Aug-09	Download
AN-898: Application Note 898 Audio Amplifiers Utilizing: SPiKe Protection	1412 Kbytes	20-Sep-02	Download
AN-898 (Japanese): Application Note 898 Audio Amplifiers Utilizing: SPiKe Protection	249 Kbytes

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

[Information as of 8-Nov-2009]