LP3964 - 800mA Fast Ultra Low Dropout Linear Regulator
Datasheet Packaging Samples & Pricing Reliability Knowledge Base

Features
•Ultra low dropout voltage
•Low ground pin current
•Load regulation of 0.02%
•15µA quiescent current in shutdown mode
•Guaranteed output current of 0.8A DC
•Available in SOT-223,TO-263 and TO-220 packages
•Output voltage accuracy ± 1.5%
•Error# flag indicates output status (LP3961)
•Sense option improves better load regulation (LP3964)
•Extremely low output capacitor requirements
•Overtemperature/overcurrent protection
•-40°C to +125°C junction temperature range

General Description

The LP3961/LP3964 series of fast ultra low-dropout linear regulators operate from a +2.5V to +7.0V input supply. More...


Applications

•Microprocessor power supplies
•GTL, GTL+, BTL, and SSTL bus terminators
•Power supplies for DSPs
•SCSI terminator
•Post regulators
•High efficiency linear regulators
•Battery chargers
•Other battery powered applications
  Typical Application
click for larger image


ParametersValues
Output Current 800 mA
Output Min 1.8, 2.5, 3.3, 1.215 Volt
Input Min Voltage 2.5 Volt
Input Max Voltage 7 Volt
Dropout Voltage 0.24 Volt
Adjustable Output No, Yes
Quiescent Current 3 mA
On/Off Pin Yes
Error Flag No
RegType LDO
Temperature Min -40 deg C
Temperature Max 125 deg C
Output Voltage 1.8, 2.5, 3.3 Volt
Output Max 1.8, 2.5, 3.3, 5 Volt


Typical Performance

click for larger image


  Also Recommended
LP3874▲Improved Shutdown Pin Thresholds
LP38851▲New! National's LP38k Family Of High
LP38852▲Performance LDOs Power Digital ICs
LP38853▲See More At LDO.NATIONAL.COM
Block Diagram
click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LP3961/LP3964 800mA Fast Ultra Low Dropout Linear Regulators 914
Kbytes		 20-Sep-06 Download
LP3961/LP3964 800mA Fast Ultra Low Dropout Linear Regulators (Japanese)
 774 Kbytes   Download

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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
LP3964EMP-5.0SOT-2235NOPB1260RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$1.07reel
of
1000		XYTT
LBUB
8 weeks2500
LP3964EMP-1.8SOT-2235NOPB
STD		1
1		260
260		RoHS Download Full productionN/A
 
Buy Now 		1K+$1.07reel
of
1000		XYTT
LBFB
8 weeks2000
LP3964EMP-2.5SOT-2235NOPB
STD		1
1		260
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.07reel
of
1000		XYTT
LBHB
8 weeks2000
LP3964EMP-3.3SOT-2235NOPB
STD		1
1		260
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.07reel
of
1000		XYTT
LBJB
8 weeks2000
LP3964EMP-ADJSOT-2235NOPB
STD		1
1		260
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.07reel
of
1000		XYTT
LBPB
6 weeks3000
LP3964EMPX-1.8SOT-2235NOPB
STD		1
1		260
260		RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$1.07reel
of
2000		XYTT
LBFB
8 weeks2500
LP3964EMPX-3.3SOT-2235NOPB1260RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$1.07reel
of
2000		XYTT
LBJB
8 weeks7500
LP3964EMPX-5.0SOT-2235RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$1.07reel
of
2000		XYTT
LBUB
16 weeksN/A
LP3964EMPX-2.5SOT-2235NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.07reel
of
2000		XYTT
LBHB
8 weeks5000
LP3964EMPX-ADJSOT-2235NOPB
STD		1
1		260
260		RoHS Download Full productionN/A
 
Buy Now 		1K+$1.07reel
of
2000		XYTT
LBPB
8 weeks5000
LP3964ET-1.8TO-2205NOPB
STD		1
1		NA
NA		RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$1.22rail
of
45		NSUZXYTTE#
LP3964ET
-1.8
8 weeks500
LP3964ET-2.5TO-2205NOPB1NARoHS Download Lifetime buyN/A
 
Buy Now 		1K+$1.22rail
of
45		NSUZXYTTE#
LP3964ET
-2.5
8 weeksN/A
LP3964ET-3.3TO-2205NOPB
STD		1
1		NA
NA		RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$1.22rail
of
45		NSUZXYTTE#
LP3964ET
-3.3
8 weeks500
LP3964ET-5.0TO-2205NOPB1NARoHS Download Lifetime buyN/A
 
Buy Now 		1K+$1.22rail
of
45		NSUZXYTTE#
LP3964ET
-5.0
8 weeksN/A
LP3964ET-ADJTO-2205NOPB1NARoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.22rail
of
45		NSUZXYTTE#
LP3964ET
-ADJ
8 weeks500
LP3964ES-5.0TO-2635NOPB3245RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$1.22rail
of
45		NSUZXYTTE#
LP3964ES
-5.0
8 weeks500
LP3964ES-1.8TO-2635NOPB
STD		3
3		245
235		RoHS Download Full productionN/A
 
Buy Now 		1K+$1.22rail
of
45		NSUZXYTTE#
LP3964ES
-1.8
8 weeks500
LP3964ES-2.5TO-2635NOPB
STD		3
3		245
235		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.22rail
of
45		NSUZXYTTE#
LP3964ES
-2.5
8 weeks500
LP3964ES-3.3TO-2635NOPB
STD		3
3		245
235		RoHS Download Full productionN/A
 
Buy Now 		1K+$1.22rail
of
45		NSUZXYTTE#
LP3964ES
-3.3
8 weeks500
LP3964ES-ADJTO-2635NOPB
STD		3
3		245
235		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.22rail
of
45		NSUZXYTTE#
LP3964ES
-ADJ
8 weeks2500
LP3964ESX-1.8TO-2635NOPB
STD		3
3		245
235		RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$1.22reel
of
500		NSUZXYTTE#
LP3964ES
-1.8
8 weeks1000
LP3964ESX-5.0TO-2635NOPB3245RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$1.22reel
of
500		NSUZXYTTE#
LP3964ES
-5.0
8 weeksN/A
LP3964ESX-2.5TO-2635NOPB
STD		3
3		245
235		RoHS Download Full productionN/A
 
Buy Now 		1K+$1.22reel
of
500		NSUZXYTTE#
LP3964ES
-2.5
8 weeks2000
LP3964ESX-3.3TO-2635NOPB
STD		3
3		245
235		RoHS Download Full productionN/A
 
Buy Now 		1K+$1.22reel
of
500		NSUZXYTTE#
LP3964ES
-3.3
8 weeks1000
LP3964ESX-ADJTO-2635NOPB
STD		3
3		245
235		RoHS Download Full productionN/A
 
Buy Now 		1K+$1.22reel
of
500		NSUZXYTTE#
LP3964ES
-ADJ
8 weeks2000

Obsolete Versions

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LP3964EMP-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964EMPX-1.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964EMPX-3.3
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964EMPX-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ES-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ESX-1.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ESX-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ET-1.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ET-2.5
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ET-2.7
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ET-3.3
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ET-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009

General Description

The LP3961/LP3964 series of fast ultra low-dropout linear regulators operate from a +2.5V to +7.0V input supply. Wide range of preset output voltage options are available. These ultra low dropout linear regulators respond very fast to step changes in load which makes them suitable for low voltage microprocessor applications. The LP3961/LP3964 are developed on a CMOS process which allows low quiescent current operation independent of output load current. This CMOS process also allows the LP3961/LP3964 to operate under extremely low dropout conditions.

Dropout Voltage: Ultra low dropout voltage; typically 24mV at 80mA load current and 240mV at 800mA load current.

Ground Pin Current: Typically 4mA at 800mA load current.

Shutdown Mode: Typically 15µA quiescent current when the shutdown pin is pulled low.

Error# Flag: Error# flag goes low when the output voltage drops 10% below nominal value (for LP3961).

SENSE: Sense pin improves regulation at remote loads. (For LP3964)

Precision Output Voltage: Multiple output voltage options are available ranging from 1.2V to 5.0V and adjustable (LP3964), with a guaranteed accuracy of ±1.5% at room temperature, and ±3.0% over all conditions (varying line, load, and temperature).

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LP3964EMP-1.8CS065238968520440200011249079519
LP3964EMP-2.5CS065238968520440200011249079519
LP3964EMP-3.3CS065238968520440200011249079519
LP3964EMP-5.0CS065238968520440200011249079519
LP3964EMP-ADJCS065238968520440200011249079519
LP3964EMPX-1.8CS065238968520440200011249079519
LP3964EMPX-2.5CS065238968520440200011249079519
LP3964EMPX-3.3CS065238968520440200011249079519
LP3964EMPX-5.0CS065238968520440200011249079519
LP3964EMPX-ADJCS065238968520440200011249079519
LP3964ES-1.8CS065238968520440200011249079519
LP3964ES-2.5CS065238968520440200011249079519
LP3964ES-3.3CS065238968520440200011249079519
LP3964ES-5.0CS065238968520440200011249079519
LP3964ES-ADJCS065238968520440200011249079519
LP3964ESX-1.8CS065238968520440200011249079519
LP3964ESX-2.5CS065238968520440200011249079519
LP3964ESX-3.3CS065238968520440200011249079519
LP3964ESX-5.0CS065238968520440200011249079519
LP3964ESX-ADJCS065238968520440200011249079519
LP3964ET-1.8CS065238968520440200011249079519
LP3964ET-2.5CS065238968520440200011249079519
LP3964ET-3.3CS065238968520440200011249079519
LP3964ET-5.0CS065238968520440200011249079519
LP3964ET-ADJCS065238968520440200011249079519

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.


[Information as of 8-Nov-2009]