LP2981 - Micropower 100 mA Ultra Low-Dropout Regulator in SOT-23 Package
Datasheet Packaging Samples & Pricing Reliability Application Notes Knowledge Base

Features
•Ultra low dropout voltage
•Output voltage accuracy 0.75% (A Grade)
•Guaranteed 100 mA output current
•< 1 μA quiescent current when shutdown
•Low ground pin current at all load currents
•High peak current capability (300 mA typical)
•Wide supply voltage range (16V max)
•Fast dynamic response to line and load
•Low ZOUT over wide frequency range
•Overtemperature/overcurrent protection
•−40°C to +125°C junction temperature range

General Description

The LP2981 is a 100 mA, fixed-output voltage regulator designed specifically to meet the requirements of battery-powered applications.

Using an optimized VIP (Vertically Integrated PNP) process, the LP2981 delivers unequaled performance in all specifications critical to battery-powered designs:

Dropout Voltage. More...


Applications

•Cellular Phone
•Palmtop/Laptop Computer
•Personal Digital Assistant (PDA)
•Camcorder, Personal Stereo, Camera
  Typical Application
click for larger image


ParametersValues
Output Current 100 mA
Output Min 3.6, 2.5, 3.3, 3, 5 Volt
Input Min Voltage 3.5, 5.2, 2.7, 3.2, 3.8 Volt
Input Max Voltage 16 Volt
Dropout Voltage 0.2 Volt
Adjustable Output No
Quiescent Current 0.065 mA
On/Off Pin Yes
Error Flag No
RegType LDO
Temperature Min -40 deg C
Temperature Max 125 deg C
Output Voltage 3.6, 2.5, 3.3, 3, 5 Volt
Output Max 3.6, 2.5, 3.3, 3, 5 Volt


Typical Performance

click for larger image


  Also Recommended
LP38691▲Higher Load Capability & Lower Ground Current
LP38693▲Higher Load Capability & Lower Ground Current
LP3878-ADJ▲Improved Output Current
LP5900▲Improved Dropout Voltage, Ceramic Capacitors OK
Additional Resources
Application Notes


Block Diagram

click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LP2981 Micropower 100 mA Ultra Low-Dropout Regulator in SOT-23 Package 443
Kbytes		 15-Jan-09 Download
LP2981 Micropower 100 mA Ultra Low-Dropout Regulator in SOT-23 Package (Japanese)
 730 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
LP2981AIM5-2.7SOT-235NOPB1260RoHS N/A Lifetime buyN/A
 
Buy Now 		1K+$0.37reel
of
1000		L0DA
XTT
8 weeks2000
LP2981AIM5-2.8SOT-235NOPB1260RoHS N/A Lifetime buyN/A
 
Buy Now 		1K+$0.37reel
of
1000		L77A
XTT
8 weeks2500
LP2981AIM5-3.8SOT-235NOPB1260RoHS N/A Lifetime buyN/A
 
Buy Now 		1K+$0.37reel
of
1000		L36A
XTT
8 weeks2500
LP2981IM5-2.7SOT-235NOPB1260RoHS N/A Lifetime buyN/A
 
Buy Now 		1K+$0.36reel
of
1000		L0DB
XTT
8 weeks5000
LP2981IM5-2.8SOT-235NOPB1260RoHS N/A Lifetime buyN/A
 
Buy Now 		1K+$0.36reel
of
1000		L77B
XTT
8 weeks3000
LP2981IM5-3.8SOT-235NOPB1260RoHS N/A Lifetime buyN/A
 
Buy Now 		1K+$0.36reel
of
1000		L36B
XTT
8 weeksN/A
LP2981AIM5-2.5SOT-235NOPB
STD		1
1		260
260		RoHS N/A Full productionN/A
 
Buy Now 		1K+$0.35reel
of
1000		L0CA
XTT
8 weeks2000
LP2981AIM5-3.0SOT-235NOPB1260RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$0.35reel
of
1000		L05A
XTT
8 weeks5000
LP2981AIM5-3.3SOT-235NOPB
STD		1
1		260
260		RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$0.35reel
of
1000		L04A
XTT
8 weeks3000
LP2981AIM5-3.6SOT-235NOPB
STD		1
1		260
260		RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$0.35reel
of
1000		L0JA
XTT
8 weeks2000
LP2981AIM5-5.0SOT-235NOPB
STD		1
1		260
260		RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$0.35reel
of
1000		L03A
XTT
8 weeks2000
LP2981IM5-2.5SOT-235NOPB
STD		1
1		260
260		RoHS N/A Full productionN/A
 
Buy Now 		1K+$0.35reel
of
1000		L0CB
XTT
12 weeks2500
LP2981IM5-3.0SOT-235NOPB1260RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$0.35reel
of
1000		L05B
XTT
8 weeks3000
LP2981IM5-3.3SOT-235NOPB
STD		1
1		260
260		RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$0.35reel
of
1000		L04B
XTT
6 weeks7500
LP2981IM5-3.6SOT-235NOPB
STD		1
1		260
260		RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$0.35reel
of
1000		L0JB
XTT
8 weeks3000
LP2981IM5-5.0SOT-235NOPB
STD		1
1		260
260		RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$0.35reel
of
1000		L03B
XTT
8 weeks2000
LP2981AIM5X-2.5SOT-235NOPB1260RoHS N/A Lifetime buyN/A
 
Buy Now 		1K+$0.37reel
of
3000		L0CA
XTT
8 weeks5000
LP2981AIM5X-2.7SOT-235NOPB1260RoHS N/A Lifetime buyN/A
 
Buy Now 		1K+$0.37reel
of
3000		L0DA
XTT
8 weeks5000
LP2981AIM5X-2.8SOT-235NOPB1260RoHS N/A Lifetime buyN/A
 
Buy Now 		1K+$0.37reel
of
3000		L77A
XTT
8 weeksN/A
LP2981AIM5X-3.2SOT-235NOPB
STD		1
1		260
260		RoHS N/A Lifetime buyN/A
 
Buy Now 		1K+$0.37reel
of
3000		L35A
XTT
8 weeksN/A
LP2981IM5X-2.5SOT-235NOPB1260RoHS N/A Lifetime buyN/A
 
Buy Now 		1K+$0.36reel
of
3000		L0CB
XTT
8 weeks5000
LP2981IM5X-2.8SOT-235NOPB1260RoHS N/A Lifetime buyN/A
 
Buy Now 		1K+$0.36reel
of
3000		L77B
XTT
8 weeksN/A
LP2981AIM5X-3.0SOT-235NOPB1260RoHS N/A Full productionN/A
 
Buy Now 		1K+$0.35reel
of
3000		L05A
XTT
8 weeks5000
LP2981AIM5X-3.3SOT-235NOPB
STD		1
1		260
260		RoHS N/A Full productionN/A
 
Buy Now 		1K+$0.35reel
of
3000		L04A
XTT
8 weeks10000
LP2981AIM5X-3.6SOT-235NOPB1260RoHS N/A Full productionN/A
 
Buy Now 		1K+$0.35reel
of
3000		L0JA
XTT
8 weeks7500
LP2981AIM5X-5.0SOT-235NOPB
STD		1
1		260
260		RoHS N/A Full productionN/A
 
Buy Now 		1K+$0.35reel
of
3000		L03A
XTT
8 weeks5000
LP2981IM5X-3.0SOT-235NOPB1260RoHS N/A Full productionN/A
 
Buy Now 		1K+$0.35reel
of
3000		L05B
XTT
8 weeks40000
LP2981IM5X-3.3SOT-235NOPB
STD		1
1		260
260		RoHS N/A Full productionN/A
 
Buy Now 		1K+$0.35reel
of
3000		L04B
XTT
8 weeks5000
LP2981IM5X-3.6SOT-235NOPB1260RoHS N/A Full productionN/A
 
Buy Now 		1K+$0.35reel
of
3000		L0JB
XTT
8 weeks5000
LP2981IM5X-5.0SOT-235NOPB
STD		1
1		260
260		RoHS N/A Full productionN/A
 
Buy Now 		1K+$0.35reel
of
3000		L03B
XTT
8 weeks5000

Obsolete Versions

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LP2981AIBP-2.5
LP2985AIBP-2.5
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981AIBP-3.2
LP2981AIM5-3.2
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981AIBP-3.3
LP2985AIBP-3.3
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981AIBPX-2.5
LP2985AIBPX-2.5
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981AIBPX-3.2
LP2981AIM5X-3.2
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981AIBPX-3.3
LP2985AIBPX-3.3
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981AIM5-2.7
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2981AIM5-2.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2981AIM5-2.9
LP2985AIM5-2.9
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981AIM5-3.1
LP2985AIM5-3.1
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981AIM5-3.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2981AIM5-4.0
LP2985AIM5-4.0
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981AIM5-4.7
LP2986AIMM-5.0
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981AIM5X-2.5
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2981AIM5X-2.7
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2981AIM5X-2.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2981AIM5X-2.9
LP2985AIM5X-2.9
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981AIM5X-3.1
LP2985AIM5X-3.1
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981AIM5X-3.2
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2981AIM5X-4.0
LP2985AIM5X-4.0
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981AIM5X-4.7
LP2986AIMMX-5.0
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981IBP-2.5
LP2985IBP-2.5
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981IBP-3.2
LP2981IM5-3.2
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981IBP-3.3
LP2985IBP-3.3
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981IBPX-2.5
LP2985IBPX-2.5
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981IBPX-3.2
LP2981IM5X-3.2
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981IBPX-3.3
LP2985IBPX-3.3
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981IM5-2.7
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2981IM5-2.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2981IM5-2.9
LP2985IM5-2.9
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981IM5-3.1
LP2985IM5-3.1
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981IM5-3.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2981IM5-4.0
LP2985IM5-4.0
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981IM5-4.7
LP2986IMM-5.0
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981IM5X-2.5
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2981IM5X-2.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2981IM5X-2.9
LP2985IM5X-2.9
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981IM5X-3.1
LP2985IM5X-3.1
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981IM5X-4.0
LP2985IM5X-4.0
NATIONAL SEMICONDUCTOR
26 Feb 2007
LP2981IM5X-4.7
LP2986IMMX-5.0
NATIONAL SEMICONDUCTOR
26 Feb 2007

General Description

The LP2981 is a 100 mA, fixed-output voltage regulator designed specifically to meet the requirements of battery-powered applications.

Using an optimized VIP (Vertically Integrated PNP) process, the LP2981 delivers unequaled performance in all specifications critical to battery-powered designs:

Dropout Voltage. Typically 200 mV @ 100 mA load, and 7 mV @ 1 mA load.

Ground Pin Current. Typically 600 μA @ 100 mA load, and 80 μA @ 1 mA load.

Sleep Mode. Less than 1 μA quiescent current when ON/OFF pin is pulled low.

Precision Output. 0.75% tolerance output voltages available (A grade).

Nine voltage options, from 2.5V to 5.0V, are available as standard products.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LP2981AIM5-2.5VIP1+0241000027850002790251354
LP2981AIM5-2.7VIP1+0241000027850002790251354
LP2981AIM5-2.8VIP1+0241000027850002790251354
LP2981AIM5-3.0VIP1+0241000027850002790251354
LP2981AIM5-3.3VIP1+0241000027850002790251354
LP2981AIM5-3.6VIP1+0241000027850002790251354
LP2981AIM5-3.8VIP1+0241000027850002790251354
LP2981AIM5-5.0VIP1+0241000027850002790251354
LP2981AIM5X-2.5VIP1+0241000027850002790251354
LP2981AIM5X-2.7VIP1+0241000027850002790251354
LP2981AIM5X-2.8VIP1+0241000027850002790251354
LP2981AIM5X-3.0VIP1+0241000027850002790251354
LP2981AIM5X-3.2VIP1+0241000027850002790251354
LP2981AIM5X-3.3VIP1+0241000027850002790251354
LP2981AIM5X-3.6VIP1+0241000027850002790251354
LP2981AIM5X-5.0VIP1+0241000027850002790251354
LP2981IM5-2.5VIP1+0241000027850002790251354
LP2981IM5-2.7VIP1+0241000027850002790251354
LP2981IM5-2.8VIP1+0241000027850002790251354
LP2981IM5-3.0VIP1+0241000027850002790251354
LP2981IM5-3.3VIP1+0241000027850002790251354
LP2981IM5-3.6VIP1+0241000027850002790251354
LP2981IM5-3.8VIP1+0241000027850002790251354
LP2981IM5-5.0VIP1+0241000027850002790251354
LP2981IM5X-2.5VIP1+0241000027850002790251354
LP2981IM5X-2.8VIP1+0241000027850002790251354
LP2981IM5X-3.0VIP1+0241000027850002790251354
LP2981IM5X-3.3VIP1+0241000027850002790251354
LP2981IM5X-3.6VIP1+0241000027850002790251354
LP2981IM5X-5.0VIP1+0241000027850002790251354

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.


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AN-1148: Application Note 1148 Linear Regulators: Theory Of Operation and Compensation 200
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AN-1148 (Japanese): Application Note 1148 Linear Regulators: Theory Of Operation and Compensation
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AN-1148 (Chinese): Application Note 1148 Linear Regulators: Theory Of Operation and Compensation
 396 Kbytes  
AN-1482: Application Note 1482 LDO Regulator Stability Using Ceramic Output Capacitors 497
Kbytes		 24-May-06 Download
AN-1482 (Japanese): Application Note 1482 LDO Regulator Stability Using Ceramic Output Capacitors
 159 Kbytes   Download
AN-1482 (Chinese): Application Note 1482 LDO Regulator Stability Using Ceramic Output Capacitors
 330 Kbytes  

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

[Information as of 8-Nov-2009]