D ts e t
aa h e
R c e t r lc r nc
o h se Ee to is
Ma u a t r dCo o e t
n fc u e
mp n n s
R c e tr b a d d c mp n ns ae
o h se rn e
o oet r
ma ua trd u ig ete dewaes
n fcue sn i r i/ fr
h
p rh s d f m te oiia s p l r
uc a e r
o h r n l u pi s
g
e
o R c e tr waes rce td f m
r o h se
fr e rae r
o
te oiia I. Al rce t n ae
h
r nl P
g
l e rai s r
o
d n wi tea p o a o teOC
o e t h p rv l f h
h
M.
P r aetse u igoiia fcoy
at r e td sn r n la tr
s
g
ts p o rmso R c e tr e eo e
e t rga
r o h se d v lp d
ts s lt n t g aa te p o u t
e t oui s o u rne
o
rd c
me t o e c e teOC d t s e t
es r x e d h
M aa h e.
Qu l yOv riw
ai
t
e ve
• IO- 0 1
S 90
•A 92 cr ct n
S 1 0 et ai
i
o
• Qu l e Ma ua trr Ls (
ai d
n fcues it QML MI- R -
) LP F
385
53
•C a sQ Mitr
ls
lay
i
•C a sVS a eL v l
ls
p c ee
• Qu l e S p l r Ls o D sr uos( L )
ai d u pi s it f it b tr QS D
e
i
•R c e trsacic l u pir oD A a d
o h se i
r ia s p l t L n
t
e
me t aln u t a dD A sa d r s
es lid sr n L tn ad .
y
R c e tr lcrnc , L i c mmi e t
o h se Ee t is L C s o
o
tdo
t
s p ligp o u t ta s t f c so r x e t-
u pyn rd cs h t ai y u tme e p ca
s
t n fr u lya daee u loto eoiial
i s o q ai n r q a t h s r n l
o
t
g
y
s p l db id sr ma ua trr.
u pi
e yn ut
y n fcues
T eoiia ma ua trr d ts e t c o a yn ti d c me t e e t tep r r n e
h r n l n fcue’ aa h e a c mp n ig hs o u n r cs h ef ma c
g
s
o
a ds e ic t n o teR c e tr n fcue v rino ti d vc . o h se Ee t n
n p c ai s f h o h se ma ua trd eso f hs e ie R c e tr lcr -
o
o
isg aa te tep r r n eo i s mio d co p o u t t teoiia OE s e ic -
c u rne s h ef ma c ft e c n u tr rd cs o h r n l M p c a
o
s
g
t n .T pc lv le aefr eee c p r o e o l. eti mii m o ma i m rt g
i s ‘y ia’ au s r o rfrn e up s s ny C r n nmu
o
a
r xmu ai s
n
ma b b s do p o u t h rceiain d sg , i lt n o s mpetsig
y e a e n rd c c aa tr t , e in smuai , r a l e t .
z o
o
n
© 2 1 R cetr l t n s LC Al i t R sre 0 1 2 1
0 3 ohs E cr i , L . lRg s eevd 7 1 0 3
e e oc
h
T l r m r, l s v iw wrcl . m
o e n oe p ae it w . e c o
a
e
s
o ec
LP2989 Micropower/Low Noise, 500 mA Ultra Low-Dropout Regulator
For Use with Ceramic Output Capacitors
February 2005
LP2989
Micropower/Low Noise, 500 mA Ultra Low-Dropout
Regulator
For Use with Ceramic Output Capacitors
General Description
The LP2989 is a fixed-output 500 mA precision LDO regu-
lator designed for use with ceramic output capacitors.
Output noise can be reduced to 18µV (typical) by connecting
an external 10 nF capacitor to the bypass pin.
Using an optimized VIP
™
(Vertically Integrated PNP) pro-
cess, the LP2989 delivers superior performance:
Dropout Voltage:
Typically 310 mV
@
500 mA load, and 1
mV
@
100 µA load.
Ground Pin Current:
Typically 3 mA
@
500 mA load, and
110 µA
@
100 µA load.
Sleep Mode:
The LP2989 draws less than 0.8 µA quiescent
current when shutdown pin is pulled low.
Error Flag:
The built-in error flag goes low when the output
drops approximately 5% below nominal.
Precision Output:
Guaranteed output voltage accuracy is
0.75% (“A” grade) and 1.25% (standard grade) at room
temperature.
For output voltages
<
2V, see LP2989LV datasheet.
Features
n
n
n
n
n
n
n
n
n
n
n
Ultra low dropout voltage
Guaranteed 500 mA continuous output current
Very low output noise with external capacitor
SO-8, Mini SO-8, 8 Lead LLP surface mount packages
<
0.8 µA quiescent current when shutdown
Low ground pin current at all loads
0.75% output voltage accuracy (“A” grade)
High peak current capability (800 mA typical)
Wide supply voltage range (16V max)
Overtemperature/overcurrent protection
−40˚C to +125˚C junction temperature range
Applications
n
n
n
n
Notebook/Desktop PC
PDA/Palmtop Computer
Wireless Communication Terminals
SMPS Post-Regulator
Block Diagram
10133901
VIP
™
is a trademark of National Semiconductor Corporation.
© 2005 National Semiconductor Corporation
DS101339
www.national.com
LP2989
Connection Diagrams
Surface Mount Packages:
8 Lead LLP Surface Mount Package
10133902
SO-8/Mini SO-8 Package
See NS Package Drawing Numbers M08A/MUA08A
10133950
Top View
See NS Package Number LDC08A
Basic Application Circuit
10133903
*Capacitance values shown are minimum required to assure stability, but may be increased without limit. Larger output capacitor provides improved dynamic
response. See Application Hints.
**Shutdown must be actively terminated (see App. Hints). Tie to INPUT (Pin4) if not used
www.national.com
2
LP2989
Ordering Information
TABLE 1. Package Marking and Ordering Information
Output Voltage
8 Lead LLP
2.5
2.5
2.5
2.5
2.8
2.8
2.8
2.8
2.85
2.85
2.85
2.85
3.0
3.0
3.0
3.0
3.3
3.3
3.3
3.3
3.6
3.6
3.6
3.6
4.0
4.0
4.0
4.0
5.0
5.0
5.0
5.0
8 Lead MSOP (MM)
2.5
2.5
2.5
2.5
2.8
2.8
2.8
2.8
3.0
3.0
3.0
3.0
3.3
3.3
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
LP2989AIMM-2.5
LP2989AIMMX-2.5
LP2989IMM-2.5
LP2989IMMX-2.5
LP2989AIMM-2.8
LP2989AIMMX-2.8
LP2989IMM-2.8
LP2989IMMX-2.8
LP2989AIMM-3.0
LP2989AIMMX-3.0
LP2989IMM-3.0
LP2989IMMX-3.0
LP2989AIMM-3.3
LP2989AIMMX-3.3
LA0A
LA0A
LA0B
LA0B
LA6A
LA6A
LA6B
LA6B
LA1A
LA1A
LA1B
LA1B
LA2A
LA2A
1000 Units on Tape and Reel
3500 Units on Tape and Reel
1000 Units on Tape and Reel
3500 Units on Tape and Reel
1000 Units on Tape and Reel
3500 Units on Tape and Reel
1000 Units on Tape and Reel
3500 Units on Tape and Reel
1000 Units on Tape and Reel
3500 Units on Tape and Reel
1000 Units on Tape and Reel
3500 Units on Tape and Reel
1000 Units on Tape and Reel
3500 Units on Tape and Reel
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
LP2989AILD-2.5
LP2989AILDX-2.5
LP2989ILD-2.5
LP2989ILDX-2.5
LP2989AILD-2.8
LP2989AILDX-2.8
LP2989ILD-2.8
LP2989ILDX-2.8
LP2989AILD-285
LP2989AILDX-285
LP2989ILD-285
LP2989ILDX-285
LP2989AILD-3.0
LP2989AILDX-3.0
LP2989ILD-3.0
LP2989ILDX-3.0
LP2989AILD-3.3
LP2989AILDX-3.3
LP2989ILD-3.3
LP2989ILDX-3.3
LP2989AILD-3.6
LP2989AILDX-3.6
LP2989ILD-3.6
LP2989ILDX-3.6
LP2989AILD-4.0
LP2989AILDX-4.0
LP2989ILD-4.0
LP2989ILDX-4.0
LP2989AILD-5.0
LP2989AILDX-5.0
LP2989ILD-5.0
LP2989ILDX-5.0
L01FA
L01FA
L01FAB
L01FAB
L000A
L000A
L000AB
L000AB
L01TA
L01TA
L01TAB
L01TAB
L01HA
L01HA
L01HAB
L01HAB
L01JA
L01JA
L01JAB
L01JAB
L019A
L019A
L019AB
L019AB
L01LA
L01LA
L01LAB
L01LAB
L01KA
L01KA
L01KAB
L01KAB
1000 Units on Tape and Reel
4500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
1000 Units on Tape and Reel
4500 Units on Tape and Reel
Grade
Order Information
Package Marking
Supplied as:
3
www.national.com
LP2989
Ordering Information
Output Voltage
3.3
3.3
5.0
5.0
5.0
5.0
SO-8 (M)
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.3
3.3
3.3
3.3
5.0
5.0
5.0
5.0
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
Grade
STD
STD
A
A
STD
STD
(Continued)
TABLE 1. Package Marking and Ordering Information
(Continued)
Order Information
LP2989IMM-3.3
LP2989IMMX-3.3
LP2989AIMM-5.0
LP2989AIMMX-5.0
LP2989IMM-5.0
LP2989IMMX-5.0
LP2989AIMX-2.5
LP2989AIM-2.5
LP2989IMX-2.5
LP2989IM-2.5
LP2989AIMX-3.0
LP2989AIM-3.0
LP2989IMX-3.0
LP2989IM-3.0
LP2989AIMX-3.3
LP2989AIM-3.3
LP2989IMX-3.3
LP2989IM-3.3
LP2989AIMX-5.0
LP2989AIM-5.0
LP2989IMX-5.0
LP2989IM-5.0
Package Marking
LA2B
LA2B
LA4A
LA4A
LA4B
LA4B
LP2989AIM2.5
LP2989AIM2.5
LP2989IM2.5
LP2989IM2.5
LP2989AIM3.0
LP2989AIM3.0
LP2989IM3.0
LP2989IM3.0
LP2989AIM3.3
LP2989AIM3.3
LP2989IM3.3
LP2989IM3.3
LP2989AIM5.0
LP2989AIM5.0
LP2989IM5.0
LP2989IM5.0
Supplied as:
1000 Units on Tape and Reel
3500 Units on Tape and Reel
1000 Units on Tape and Reel
3500 Units on Tape and Reel
1000 Units on Tape and Reel
3500 Units on Tape and Reel
2500 Units on Tape and Reel
Shipped in Anti-Static Rails
2500 Units on Tape and Reel
Shipped in Anti-Static Rails
2500 Units on Tape and Reel
Shipped in Anti-Static Rails
2500 Units on Tape and Reel
Shipped in Anti-Static Rails
2500 Units on Tape and Reel
Shipped in Anti-Static Rails
2500 Units on Tape and Reel
Shipped in Anti-Static Rails
2500 Units on Tape and Reel
Shipped in Anti-Static Rails
2500 Units on Tape and Reel
Shipped in Anti-Static Rails
For output voltages
<
2V, see LP2989LV datasheet.
www.national.com
4
