LM1084 - 5A Low Dropout Positive Regulators

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

Features
  • Available in 3.3V, 5.0V, 12V and Adjustable Versions
  • Current Limiting and Thermal Protection

Output Current

5A

Industrial Temperature Range

-40°C to 125°C

Line Regulation

0.015% (typical)

Load Regulation

0.1% (typical)

General Description


The LM1084 is a series of low dropout voltage positive regulators with a maximum dropout of 1.5V at 5A of load current. More...


Applications


Post Regulator for Switching DC/DC Conveter
High Efficiency Linear Regulators
Battery Charger
  Typical Application
click for larger image


Parametric Table     expand
Parametric Table    collapse
Output Current 5000 mA
Output Min 1.25, 3.3, 5 Volt
Input Min Voltage 2.6 Volt
Input Max Voltage 25, 27, 29 Volt
Dropout Voltage 1.3 Volt
Adjustable Output No
Quiescent Current 5 mA
Output Current 5000 mA
Output Min 1.25, 3.3, 5 Volt
Input Min Voltage 2.6 Volt
Input Max Voltage 25, 27, 29 Volt
Dropout Voltage 1.3 Volt
Adjustable Output No
Quiescent Current 5 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 Volt
Output Voltage 3.3, 5 Volt
View Using Catalog


Typical Performance


click for larger image


  Also Recommended
LM2677Switching Solution With Higher Efficiency , Wider Voltage Range , Shutdown Mode
LM2678Switching Solution With Higher Efficiency , Wider Voltage Range , Shutdown Mode
LM2679Switching Solution With Higher Efficiency , Wider Voltage Range , Adjustable Current Limit
LM10853A Version
LM10861.5A Version

Additional Resources


Design Tools (see below)

Application Notes (see below)


Connection Diagram


click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM1084 5A Low Dropout Positive Regulators 750 Kbytes 6-Jun-05 Download
LM1084 5A Low Dropout Positive Regulators (Japanese)
499 Kbytes   Download

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


Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders
Budgetary PricingStd
Pack
Size
Package
Marking
Format
TypePinsSpec.MSL
Rating
Peak
Reflow
RoHS
Report
CAD
Symbols
WeeksQtyQty$US each
LM1084IT-12TO-2203STD
NOPB
1
1
NA
NA
RoHS Download ObsoleteN/A
 
Buy Now
1K+$1.47rail
of
45
NSUZXYTTE#
LM1084
IT-12
12 weeks5000
LM1084IT-3.3TO-2203STD
NOPB
1
1
NA
NA
RoHS Download Full productionN/A
Samples
Buy Now
1K+$1.47rail
of
45
NSUZXYTTE#
LM1084
IT-3.3
8 weeks500
LM1084IT-5.0TO-2203STD
NOPB
1
1
NA
NA
RoHS Download Full productionN/A
 
Buy Now
1K+$1.47rail
of
45
NSUZXYTTE#
LM1084
IT-5.0
8 weeks500
LM1084IT-ADJTO-2203STD
NOPB
1
1
NA
NA
RoHS Download Full productionN/A
Samples
Buy Now
1K+$1.47rail
of
45
NSUZXYTTE#
LM1084
IT-ADJ
8 weeks500
LM1084IS-12TO-2633NOPB3245RoHS Download Lifetime buyN/A
 
Buy Now
1K+$1.48rail
of
45
NSUZXYTTE#
LM1084
IS-12
8 weeks1000
LM1084IS-3.3TO-2633STD
NOPB
3
3
235
245
RoHS Download Full productionN/A
Samples
Buy Now
1K+$1.48rail
of
45
NSUZXYTTE#
LM1084
IS-3.3
8 weeks500
LM1084IS-5.0TO-2633STD
NOPB
3
3
235
245
RoHS Download Full productionN/A
 
Buy Now
1K+$1.48rail
of
45
NSUZXYTTE#
LM1084
IS-5.0
8 weeks500
LM1084IS-ADJTO-2633STD
NOPB
3
3
235
245
RoHS Download Full productionN/A
Samples
Buy Now
1K+$1.48rail
of
45
NSUZXYTTE#
LM1084
IS-ADJ
8 weeks1000
LM1084ISX-12TO-2633NOPB3245RoHS Download Lifetime buyN/A
 
Buy Now
1K+$1.48reel
of
500
NSUZXYTTE#
LM1084
IS-12
8 weeks1000
LM1084ISX-3.3TO-2633STD
NOPB
3
3
235
245
RoHS Download Full productionN/A
 
Buy Now
1K+$1.48reel
of
500
NSUZXYTTE#
LM1084
IS-3.3
8 weeks1000
LM1084ISX-5.0TO-2633STD
NOPB
3
3
235
245
RoHS Download Full productionN/A
 
Buy Now
1K+$1.48reel
of
500
NSUZXYTTE#
LM1084
IS-5.0
8 weeks1000
LM1084ISX-ADJTO-2633STD
NOPB
3
3
235
245
RoHS Download Full productionN/A
 
Buy Now
1K+$1.48reel
of
500
NSUZXYTTE#
LM1084
IS-ADJ
8 weeks1000

Obsolete Versions

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM1084IS-12
LM1084IS-ADJ
NATIONAL SEMICONDUCTOR
01 Dec 2009
LM1084ISX-12
LM1084IS-ADJ
NATIONAL SEMICONDUCTOR
01 Dec 2009
LM1084IT-12
NONE
NATIONAL SEMICONDUCTOR
16 Nov 2008

General Description


The LM1084 is a series of low dropout voltage positive regulators with a maximum dropout of 1.5V at 5A of load current. It has the same pin-out as National Semiconductor's industry standard LM317.

The LM1084 is available in an adjustable version, which can set the output voltage with only two external resistors. It is also available in three fixed voltages: 3.3V, 5.0V and 12.0V. The fixed versions intergrate the adjust resistors.

The LM1084 circuit includes a zener trimmed bandgap reference, current limiting and thermal shutdown.

The LM1084 series is available in TO-220 and TO-263 packages. Refer to the LM1085 for the 3A version, and the LM1086 for the 1.5A version.

Reliability Metrics


Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM1084IS-12LB3000322490034065002966603676
LM1084IS-3.3LB3000322490034065002966603676
LM1084IS-5.0LB3000322490034065002966603676
LM1084IS-ADJLB3000322490034065002966603676
LM1084ISX-12LB3000322490034065002966603676
LM1084ISX-3.3LB3000322490034065002966603676
LM1084ISX-5.0LB3000322490034065002966603676
LM1084ISX-ADJLB3000322490034065002966603676
LM1084IT-12LB3000322490034065002966603676
LM1084IT-3.3LB3000322490034065002966603676
LM1084IT-5.0LB3000322490034065002966603676
LM1084IT-ADJLB3000322490034065002966603676

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


TitleSize in Kbytes Date Click link below to Download    
LM108X Qualification Package 1455 Kbytes 24-Jun-1999 View Online Download  

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

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AN-1148 (Japanese): Application Note 1148 Linear Regulators: Theory Of Operation and Compensation
216 Kbytes   Download
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
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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 3-Jul-2009]