LP2981
100 mA ULTRA LOW DROPOUT REGULATOR
WITH SHUTDOWN
SLVS521B - JULY 2004 - REVISED OCTOBER 2004
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
Available in the Texas Instruments
NanoStar
Chip Scale Package
D
Fixed/ADJ Versions
D
Output Tolerance of:
- 0.75% (A Grade)
- 1.25% (Standard Grade)
D
Ultra-Low Dropout, Typically
- 200 mV at Full Load of 100 mA
- 7 mV at 1 mA
D
Wide V
IN
Range . . . 16 V Max
D
Low I
Q
. . . 600
A Typ at Full Load of
100 mA
D
Shutdown Current . . . 0.01
A Typ
D
Fast Transient Response to Line and Load
D
Overcurrent and Thermal Protection
D
High Peak Current Capability
D
Portable Applications
- Mobile Phones
- Laptops
- Personal Digital Assistants (PDAs)
- Digital Cameras and Camcorders
- CD and MP3 Players
description/ordering information
The LP2981 family of fixed-output, low-dropout regulators offers exceptional, cost-effective performance for
both portable and nonportable applications. Available in adjustable version and in fixed voltages of 1.8 V,
2.5 V, 2.7 V, 2.8 V, 2.9 V, 3 V, 3.2 V, 3.3 V, 3.6 V, and 5 V, the family has an output tolerance of 0.75% for the
A-grade devices (1.25% for the standard grade) and is capable of delivering 100-mA continuous load current.
Standard regulator features, such as over-current and over-temperature protection, are included.
The LP2981 has features that make the regulator an ideal candidate for a variety of portable applications:
Low dropout: A PNP pass element allows a typical dropout of 200 mV at 100-mA load current and 7 mV
at 1-mA load.
Low quiescent current: The use of a vertical PNP process allows for quiescent currents that are
considerably lower than those associated with traditional lateral PNP regulators.
Shutdown: A shutdown feature is available, allowing the regulator to consume only 0.01
A
when the
ON/OFF pin is pulled low.
Small packaging: For the most space-constraint needs, the regulator is available in SOT-23 package
and NanoStar
chip scale packaging. NanoStar package technology is a major breakthrough in IC
packaging concepts, using the die as the package.
Copyright
2004, Texas Instruments Incorporated
DBV (SOT-23) PACKAGE
(TOP VIEW)
1
2
3
5
4
V
IN
GND
ON/OFF
V
OUT
ADJ/NC
ON/OFF
YEQ, YEU, YZQ, OR YZU (WCSP) PACKAGE
(TOP VIEW)
2
5
1
4
3
GND
ADJ/NC
V
OUT
V
IN
Must be left open in fixed-output versions
NanoStar is a trademark of Texas Instruments.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
PREVIEW
PREVIEW
PREVIEW
PREVIEW
PREVIEW
PREVIEW
PREVIEW
PREVIEW
PREVIEW
LP2981
100 mA ULTRA LOW DROPOUT REGULATOR
WITH SHUTDOWN
SLVS521B - JULY 2004 - REVISED OCTOBER 2004
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description/ordering information (continued)
ORDERING INFORMATION
TJ
PART GRADE
VOUT
(NOM)
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
ADJ
Reel of 3000
LP2981DBVR
ADJ
Reel of 250
LP2981DBVT
1.25 V
Reel of 3000
LP2981A-125DBVR
1.25 V
Reel of 250
LP2981A-125DBVT
1.8 V
Reel of 3000
LP2981A-18DBVR
1.8 V
Reel of 250
LP2981A-18DBVT
2.5 V
Reel of 3000
LP2981A-25DBVR
2.5 V
Reel of 250
LP2981A-25DBVT
2.7 V
Reel of 3000
LP2981A-27DBVR
2.7 V
Reel of 250
LP2981A-27DBVT
2.8 V
Reel of 3000
LP2981A-28DBVR
LP6_
-40
C to 125
C
A grade:
2.8 V
SOT23-5 (DBV)
Reel of 250
LP2981A-28DBVT
LP6_
-40
C to 125
C
A grade:
0.75% tolerance
2.9 V
SOT23-5 (DBV)
Reel of 3000
LP2981A-29DBVR
0.75% tolerance
2.9 V
Reel of 250
LP2981A-29DBVT
3 V
Reel of 3000
LP2981A-30DBVR
LP8_
3 V
Reel of 250
LP2981A-30DBVT
LP8_
3.2 V
Reel of 3000
LP2981A-32DBVR
3.2 V
Reel of 250
LP2981A-32DBVT
3.3 V
Reel of 3000
LP2981A-33DBVR
LPC_
3.3 V
Reel of 250
LP2981A-33DBVT
LPC_
3.6 V
Reel of 3000
LP2981A-36DBVR
3.6 V
Reel of 250
LP2981A-36DBVT
5 V
Reel of 3000
LP2981A-50DBVR
5 V
Reel of 250
LP2981A-50DBVT
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
DBV: The actual top-side marking has one additional character that designates the assembly/test site.
LP2981
100 mA ULTRA LOW DROPOUT REGULATOR
WITH SHUTDOWN
SLVS521B - JULY 2004 - REVISED OCTOBER 2004
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
ORDERING INFORMATION (continued)
TJ
PART GRADE
VOUT
(NOM)
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
ADJ
LP2981YEQR
1.25 V
LP2981A-125YEQR
1.8 V
LP2981A-18YEQR
2.5 V
LP2981A-25YEQR
2.7 V
NanoStar
- WCSP
LP2981A-27YEQR
2.8 V
NanoStar
- WCSP
0.17-mm Bump (YEQ)
Reel of 3000
LP2981A-28YEQR
2.9 V
0.17-mm Bump (YEQ)
Reel of 3000
LP2981A-29YEQR
3 V
LP2981A-30YEQR
3.2 V
LP2981A-32YEQR
3.3 V
LP2981A-33YEQR
-40
C to 125
C
A grade:
5 V
LP2981A-50YEQR
-40
C to 125
C
A grade:
0.75% tolerance
ADJ
LP2981YZQR
0.75% tolerance
1.25 V
LP2981A-125YZQR
1.8 V
LP2981A-18YZQR
2.5 V
LP2981A-25YZQR
2.7 V
NanoFree
- WCSP
LP2981A-27YZQR
2.8 V
NanoFree
- WCSP
0.17-mm Bump
(YZQ, Pb-free)
Reel of 3000
LP2981A-28YZQR
2.9 V
0.17-mm Bump
(YZQ, Pb-free)
Reel of 3000
LP2981A-29YZQR
3 V
LP2981A-30YZQR
3.2 V
LP2981A-32YZQR
3.3 V
LP2981A-33YZQR
5 V
LP2981A-50YZQR
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
YEQ/YZQ: The actual top-side marking has three preceding characters to denote year, month, and sequence code, and one following character
to designate the assembly/test site. Pin 1 identifier indicates solder-bump composition (1 = SnPb,
= Pb-free).
LP2981
100 mA ULTRA LOW DROPOUT REGULATOR
WITH SHUTDOWN
SLVS521B - JULY 2004 - REVISED OCTOBER 2004
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
ORDERING INFORMATION (continued)
TJ
PART GRADE
VOUT
(NOM)
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
ADJ
LP2981YEUR
1.25 V
LP2981A-125YEUR
1.8 V
LP2981A-18YEUR
2.5 V
LP2981A-25YEUR
2.7 V
NanoStar
- WCSP
LP2981A-27YEUR
2.8 V
NanoStar
- WCSP
0.30-mm Bump (YEU)
Reel of 3000
LP2981A-28YEUR
2.9 V
0.30-mm Bump (YEU)
Reel of 3000
LP2981A-29YEUR
3 V
LP2981A-30YEUR
3.2 V
LP2981A-32YEUR
3.3 V
LP2981A-33YEUR
-40
C to 125
C
A grade:
5 V
LP2981A-50YEUR
-40
C to 125
C
A grade:
0.75% tolerance
ADJ
LP2981YZUR
0.75% tolerance
1.25 V
LP2981A-125YZUR
1.8 V
LP2981A-18YZUR
2.5 V
LP2981A-25YZUR
2.7 V
NanoFree
- WCSP
LP2981A-27YZUR
2.8 V
NanoFree
- WCSP
0.30-mm Bump
(YZU, Pb-free)
Reel of 3000
LP2981A-28YZUR
2.9 V
0.30-mm Bump
(YZU, Pb-free)
Reel of 3000
LP2981A-29YZUR
3 V
LP2981A-30YZUR
3.2 V
LP2981A-32YZUR
3.3 V
LP2981A-33YZUR
5 V
LP2981A-50YZUR
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
YEU/YZU: The actual top-side marking has three preceding characters to denote year, month, and sequence code, and one following character
to designate the assembly/test site. Pin 1 identifier indicates solder-bump composition (1 = SnPb,
= Pb-free).
PREVIEW
PREVIEW
PREVIEW
PREVIEW
PREVIEW
PREVIEW
PREVIEW
PREVIEW
PREVIEW
LP2981
100 mA ULTRA LOW DROPOUT REGULATOR
WITH SHUTDOWN
SLVS521B - JULY 2004 - REVISED OCTOBER 2004
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
ORDERING INFORMATION (continued)
TJ
PART GRADE
VOUT
(NOM)
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
ADJ
Reel of 3000
LP2981DBVR
ADJ
Reel of 250
LP2981DBVT
1.25 V
Reel of 3000
LP2981-125DBVR
1.25 V
Reel of 250
LP2981-125DBVT
1.8 V
Reel of 3000
LP2981-18DBVR
1.8 V
Reel of 250
LP2981-18DBVT
2.5 V
Reel of 3000
LP2981-25DBVR
2.5 V
Reel of 250
LP2981-25DBVT
2.7 V
Reel of 3000
LP2981-27DBVR
2.7 V
Reel of 250
LP2981-27DBVT
2.8 V
Reel of 3000
LP2981-28DBVR
LP5_
-40
C to 125
C
Standard grade:
2.8 V
SOT-23 (DBV)
Reel of 250
LP2981-28DBVT
LP5_
-40
C to 125
C
Standard grade:
1.25% tolerance
2.9 V
SOT-23 (DBV)
Reel of 3000
LP2981-29DBVR
1.25% tolerance
2.9 V
Reel of 250
LP2981-29DBVT
3 V
Reel of 3000
LP2981-30DBVR
LP7_
3 V
Reel of 250
LP2981-30DBVT
LP7_
3.2 V
Reel of 3000
LP2981-32DBVR
3.2 V
Reel of 250
LP2981-32DBVT
3.3 V
Reel of 3000
LP2981-33DBVR
LPB_
3.3 V
Reel of 250
LP2981-33DBVT
LPB_
3.6 V
Reel of 3000
LP2981-36DBVR
3.6 V
Reel of 250
LP2981-36DBVT
5 V
Reel of 3000
LP2981-50DBVR
5 V
Reel of 250
LP2981-50DBVT
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
DBV: The actual top-side marking has one additional character that designates the assembly/test site.
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