LP2980
Micropower 50 mA Ultra Low-Dropout Regulator
General Description
The LP2980 is a 50 mA, fixed-output voltage regulator de-
signed
specifically
to
meet
the
requirements
of
battery-powered applications.
Using an optimized VIP
TM
(Vertically Integrated PNP) pro-
cess, the LP2980 delivers unequaled performance in all
specifications critical to battery-powered designs:
Dropout Voltage. Typically 120 mV
@
50 mA load, and 7 mV
@
1 mA load.
Ground Pin Current. Typically 375 A
@
50 mA load, and 80
A
@
1 mA load.
Sleep Mode. Less than 1 A quiescent current when ON/
OFF pin is pulled low.
Smallest Possible Size. SOT-23 and micro SMD packages
use an absolute minimum board space.
Minimum Part Count. Requires only 1 F of external ca-
pacitance on the regulator output.
Precision Output. 0.5% tolerance output voltages available
(A grade).
5.0V, 3.3V, and 3.0V versions available as standard prod-
ucts.
Features
n
Ultra low dropout voltage
n
Output voltage accuracy 0.5% (A Grade)
n
Guaranteed 50 mA output current
n
Smallest possible size (SOT-23, micro SMD package)
n
Requires only 1 F external capacitance
n
<
1 A quiescent current when shutdown
n
Low ground pin current at all load currents
n
High peak current capability (150 mA typical)
n
Wide supply voltage range (16V max)
n
Fast dynamic response to line and load
n
Low Z
OUT
over wide frequency range
n
Overtemperature/overcurrent protection
n
-40C to +125C junction temperature range
Applications
n
Cellular Phone
n
Palmtop/Laptop Computer
n
Personal Digital Assistant (PDA)
n
Camcorder, Personal Stereo, Camera
Block Diagram
Connection Diagram and Ordering Information
VIP
TM
is a trademark of National Semiconductor Corporation.
DS012078-1
5-Lead Small Outline Package (M5)
DS012078-3
Top View
See NS Package Number MF05A
For ordering information see
Table 1
micro SMD, 5 Bump Package (BPA05)
DS012078-60
Bottom View
See NS Package Number BPA05
April 2000
LP2980
Micropower
50
mA
Ultra
Low-Dropout
Regulator
2000 National Semiconductor Corporation
DS012078
www.national.com
Ordering Information
TABLE 1. Package Marking and Order Information
Output Voltage
(V)
Grade
Order Information
Package
Marking
Supplied as:
5-Lead Small Outline Package (M5)
For output voltages
2V, refer to LP2980LV datasheet. If a non-standard voltage is required, see LP2980-ADJ.
2.5
A
LP2980AIM5X-2.5
L0NA
3000 Units on Tape and Reel
2.5
A
LP2980AIM5-2.5
L0NA
1000 Units on Tape and Reel
2.5
STD
LP2980IM5X-2.5
L0NB
3000 Units on Tape and Reel
2.5
STD
LP2980IM5-2.5
L0NB
1000 Units on Tape and Reel
2.6
A
LP2980AIM5X-2.6
L48A
3000 Units on Tape and Reel
2.6
A
LP2980AIM5-2.6
L48A
1000 Units on Tape and Reel
2.6
STD
LP2980IM5X-2.6
L48B
3000 Units on Tape and Reel
2.6
STD
LP2980IM5-2.6
L48B
1000 Units on Tape and Reel
2.7
A
LP2980AIM5X-2.7
L26A
3000 Units on Tape and Reel
2.7
A
LP2980AIM5-2.7
L26A
1000 Units on Tape and Reel
2.7
STD
LP2980IM5X-2.7
L26B
3000 Units on Tape and Reel
2.7
STD
LP2980IM5-2.7
L26B
1000 Units on Tape and Reel
2.8
A
LP2980AIM5X-2.8
L13A
3000 Units on Tape and Reel
2.8
A
LP2980AIM5-2.8
L13A
1000 Units on Tape and Reel
2.8
STD
LP2980IM5X-2.8
L13B
3000 Units on Tape and Reel
2.8
STD
LP2980IM5-2.8
L13B
1000 Units on Tape and Reel
2.9
A
LP2980AIM5X-2.9
L12A
3000 Units on Tape and Reel
2.9
A
LP2980AIM5-2.9
L12A
1000 Units on Tape and Reel
2.9
STD
LP2980IM5X-2.9
L12B
3000 Units on Tape and Reel
2.9
STD
LP2980IM5-2.9
L12B
1000 Units on Tape and Reel
3.0
A
LP2980AIM5X-3.0
L02A
3000 Units on Tape and Reel
3.0
A
LP2980AIM5-3.0
L02A
1000 Units on Tape and Reel
3.0
STD
LP2980IM5X-3.0
L02B
3000 Units on Tape and Reel
3.0
STD
LP2980IM5-3.0
L02B
1000 Units on Tape and Reel
3.1
A
LP2980AIM5X-3.1
L30A
3000 Units on Tape and Reel
3.1
A
LP2980AIM5-3.1
L30A
1000 Units on Tape and Reel
3.1
STD
LP2980IM5X-3.1
L30B
3000 Units on Tape and Reel
3.1
STD
LP2980IM5-3.1
L30B
1000 Units on Tape and Reel
3.2
A
LP2980AIM5X-3.2
L31A
3000 Units on Tape and Reel
3.2
A
LP2980AIM5-3.2
L31A
1000 Units on Tape and Reel
3.2
STD
LP2980IM5X-3.2
L31B
3000 Units on Tape and Reel
3.2
STD
LP2980IM5-3.2
L31B
1000 Units on Tape and Reel
3.3
A
LP2980AIM5X-3.3
L00A
3000 Units on Tape and Reel
3.3
A
LP2980AIM5-3.3
L00A
1000 Units on Tape and Reel
3.3
STD
LP2980IM5X-3.3
L00B
3000 Units on Tape and Reel
3.3
STD
LP2980IM5-3.3
L00B
1000 Units on Tape and Reel
3.5
A
LP2980AIM5X-3.5
L27A
3000 Units on Tape and Reel
3.5
A
LP2980AIM5-3.5
L27A
1000 Units on Tape and Reel
3.5
STD
LP2980IM5X-3.5
L27B
3000 Units on Tape and Reel
3.5
STD
LP2980IM5-3.5
L27B
1000 Units on Tape and Reel
3.6
A
LP2980AIM5X-3.6
L28A
3000 Units on Tape and Reel
3.6
A
LP2980AIM5-3.6
L28A
1000 Units on Tape and Reel
3.6
STD
LP2980IM5X-3.6
L28B
3000 Units on Tape and Reel
3.6
STD
LP2980IM5-3.6
L28B
1000 Units on Tape and Reel
LP2980
www.national.com
2
Ordering Information
(Continued)
TABLE 1. Package Marking and Order Information (Continued)
Output Voltage
(V)
Grade
Order Information
Package
Marking
Supplied as:
For output voltages
2V, refer to LP2980LV datasheet. If a non-standard voltage is required, see LP2980-ADJ.
3.8
A
LP2980AIM5X-3.8
L21A
3000 Units on Tape and Reel
3.8
A
LP2980AIM5-3.8
L21A
1000 Units on Tape and Reel
3.8
STD
LP2980IM5X-3.8
L21B
3000 Units on Tape and Reel
3.8
STD
LP2980IM5-3.8
L21B
1000 Units on Tape and Reel
4.0
A
LP2980AIM5X-4.0
L25A
3000 Units on Tape and Reel
4.0
A
LP2980AIM5-4.0
L25A
1000 Units on Tape and Reel
4.0
STD
LP2980IM5X-4.0
L25B
3000 Units on Tape and Reel
4.0
STD
LP2980IM5-4.0
L25B
1000 Units on Tape and Reel
4.5
A
LP2980AIM5X-4.5
L0XA
3000 Units on Tape and Reel
4.5
A
LP2980AIM5-4.5
L0XA
1000 Units on Tape and Reel
4.5
STD
LP2980IM5X-4.5
L0XB
3000 Units on Tape and Reel
4.5
STD
LP2980IM5-4.5
L0XB
1000 Units on Tape and Reel
4.7
A
LP2980AIM5X-4.7
L37A
3000 Units on Tape and Reel
4.7
A
LP2980AIM5-4.7
L37A
1000 Units on Tape and Reel
4.7
STD
LP2980IM5X-4.7
L37B
3000 Units on Tape and Reel
4.7
STD
LP2980IM5-4.7
L37B
1000 Units on Tape and Reel
5.0
A
LP2980AIM5X-5.0
L01A
3000 Units on Tape and Reel
5.0
A
LP2980AIM5-5.0
L01A
1000 Units on Tape and Reel
5.0
STD
LP2980IM5X-5.0
L01B
3000 Units on Tape and Reel
5.0
STD
LP2980IM5-5.0
L01B
1000 Units on Tape and Reel
micro SMD, 5 Bump Package (BPA05)
3.3
A
LP2980AIBP-3.3
250 Units on Tape and Reel
3.3
A
LP2980AIBPX-3.3
3000 Units on Tape and Reel
3.3
STD
LP2980IBP-3.3
250 Units on Tape and Reel
3.3
STD
LP2980IBPX-3.3
3000 Units on Tape and Reel
5.0
A
LP2980AIBP-5.0
250 Units on Tape and Reel
5.0
A
LP2980AIBPX-5.0
3000 Units on Tape and Reel
5.0
STD
LP2980IBP-5.0
250 Units on Tape and Reel
5.0
STD
LP2980IBPX-5.0
3000 Units on Tape and Reel
LP2980
www.national.com
3
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Storage Temperature Range
-65C to +150C
Operating Junction Temperature
Range
-40C to +125C
Lead Temperature
(Soldering, 5 sec.)
260C
ESD Rating (Note 2)
2 kV
Power Dissipation (Note 3)
Internally Limited
Input Supply Voltage (Survival)
-0.3V to +16V
Input Supply Voltage (Operating)
2.1V to +16V
Shutdown Input Voltage (Survival)
-0.3V to +16V
Output Voltage (Survival), (Note 4)
-0.3V to +9V
I
OUT
(Survival)
Short Circuit Protected
Input-Output Voltage (Survival),
(Note 5)
-0.3V to +16V
Electrical Characteristics
Limits in standard typeface are for T
J
= 25C, and limits in boldface type apply over the full operating temperature range. Un-
less otherwise specified: V
IN
= V
O(NOM)
+ 1V, I
L
= 1 mA, C
OUT
= 1 F, V
ON/OFF
= 2V.
Symbol
Parameter
Conditions
Typ
LP2980AI-XX
LP2980I-XX
Units
(Note 6)
(Note 6)
Min
Max
Min
Max
V
O
Output Voltage
Tolerance
I
L
= 1 mA
-0.50
0.50
-1.0
1.0
%V
NOM
1 mA
<
I
L
<
50 mA
-0.75
0.75
-1.5
1.5
-2.5
2.5
-3.5
3.5
Output Voltage
V
O(NOM)
+ 1V
0.007
0.014
0.014
%/V
Line Regulation
V
IN
16V
0.032
0.032
V
IN
V
O
Dropout Voltage
I
L
= 0
1
3
3
mV
(Note 7)
5
5
I
L
= 1 mA
7
10
10
15
15
I
L
= 10 mA
40
60
60
90
90
I
L
= 50 mA
120
150
150
225
225
I
GND
Ground Pin Current
I
L
= 0
65
95
95
A
125
125
I
L
= 1 mA
80
110
110
170
170
I
L
= 10 mA
140
220
220
460
460
I
L
= 50 mA
375
600
600
1200
1200
V
ON/OFF
<
0.18V
0
1
1
V
ON/OFF
ON/OFF Input Voltage
High = O/P ON
1.4
1.6
1.6
V
(Note 8)
Low = O/P OFF
0.55
0.18
0.18
I
ON/OFF
ON/OFF Input Current
V
ON/OFF
= 0
0
-1
-1
A
V
ON/OFF
= 5V
5
15
15
I
O(PK)
Peak Output Current
V
OUT
V
O(NOM)
- 5%
150
100
100
mA
e
n
Output Noise
BW = 300 Hz50 kHz,
160
V
Voltage (RMS)
C
OUT
= 10 F
Ripple Rejection
f = 1 kHz
63
dB
C
OUT
= 10 F
I
O(MAX)
Short Circuit Current
R
L
= 0 (Steady State)
150
mA
(Note 9)
Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the de-
vice outside of its rated operating conditions.
Note 2: The ESD rating of pins 3 and 4 is 1 kV.
LP2980
www.national.com
4
Electrical Characteristics
(Continued)
Note 3: The maximum allowable power dissipation is a function of the maximum junction temperature, T
J(MAX)
, the junction-to-ambient thermal resistance,
JA
, and
the ambient temperature, T
A
. The maximum allowable power dissipation at any ambient temperature is calculated using:
The value of
JA
for the SOT-23 package is 220C/W and the micro SMD package is 320C/W. Exceeding the maximum allowable power dissipation will cause ex-
cessive die temperature, and the regulator will go into thermal shutdown.
Note 4: If used in a dual-supply system where the regulator load is returned to a negative supply, the LP2980 output must be diode-clamped to ground.
Note 5: The output PNP structure contains a diode between the V
IN
and V
OUT
terminals that is normally reverse-biased. Reversing the polarity from V
IN
to V
OUT
will turn on this diode (see Application Hints).
Note 6: Limits are 100% production tested at 25C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control
(SQC) methods. The limits are used to calculate National's Average Outgoing Quality Level (AOQL).
Note 7: Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below the value measured with a 1V differential.
Note 8: The ON/OFF inputs must be properly driven to prevent misoperation. For details, refer to Application Hints.
Note 9: See Typical Performance Characteristics curves.
Basic Application Circuit
DS012078-2
*
ON/OFF input must be actively terminated. Tie to V
IN
if this function is not to be used.
**
Minimum Output Capacitance is 1 F to insure stability over full load current range. More capacitance provides superior dynamic performance and additional
stability margin (see Application Hints).
***
Do not make connections to this pin.
LP2980
www.national.com
5
PDF 
ZIP