LP2980LV
Micropower SOT, 50 mA Low-Voltage Low-Dropout
Regulator For Applications With Output Voltages
<
2V
General Description
The LP2980LV is a 50 mA, fixed-output voltage regulator
designed for high performance in applications requiring out-
put voltages below 2V.
Using an optimized VIP
TM
(Vertically Integrated PNP) pro-
cess, the LP2980LV delivers unequalled performance in all
specifications critical to battery-powered designs:
Low Ground Pin Current. Typically 280 A
@
50 mA load,
and 75 A
@
1 mA load.
Sleep Mode. Less than 1 A quiescent current when ON/
OFF pin is pulled low.
Smallest Possible Size. SOT-23 package uses absolute
minimum board space.
Precision Output. 0.5% tolerance output voltages available
(A grade).
Features
n
Guaranteed 50 mA output current
n
Smallest possible size (SOT-23 Package)
n
Requires few external components
n
<
1 A quiescent current when shutdown
n
Low ground pin current at all load currents
n
Output voltage accuracy 0.5% (A Grade)
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
0.1
typical (10 Hz to 1 MHz)
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
10109101
VIP
TM
is a trademark of National Semiconductor Corporation.
March 2005
LP2980L
V
Micropower
SOT
,
5
0
m
A
Low-V
oltage
Low-Dropout
Regulator
For
Applications
W
ith
Output
V
oltages
<
2V
2005 National Semiconductor Corporation
DS101091
www.national.com
Connection Diagrams
5-Lead Small Outline Package (M5)
micro SMD, 5 Bump Package (BPA05)
10109102
Top View
See NS Package Number MF05A
For ordering information see Table 1
10109157
Note: The actual physical placement of the package marking will vary from
part to part. The package marking will designate the date code and will vary
considerably. Package marking does not correlate to device type in any way.
Top View
See NS Package Number BPA05
Pin Descrption
Name
Pin Number
Function
SOT-23
micro SMD
V
IN
1
C3
Input Voltage
GND
2
A1
Common Ground (device substrate)
ON/OFF
3
A3
Logic high enable input
N/C
4
B2
Post package trim - do not connect to this pin
V
OUT
5
C1
Regulated output voltage
Ordering Information
TABLE 1. Package Marking and Ordering Information
Output Voltage
(V)
Grade
Order Information
Package Marking
Supplied as:
1.5V
A
LP2980AIM5X-1.5
LANA
3000 Units on Tape and Reel
1.5V
A
LP2980AIM5-1.5
LANA
1000 Units on Tape and Reel
1.5V
STD
LP2980IM5X-1.5
LANB
3000 Units on Tape and Reel
1.5V
STD
LP2980IM5-1.5
LANB
1000 Units on Tape and Reel
1.8V
A
LP2980AIM5X-1.8
LAGA
3000 Units on Tape and Reel
1.8V
A
LP2980AIM5-1.8
LAGA
1000 Units on Tape and Reel
1.8V
STD
LP2980IM5X-1.8
LAGB
3000 Units on Tape and Reel
1.8V
STD
LP2980IM5-1.8
LAGB
1000 Units on Tape and Reel
For output voltages
>
2V, refer to LP2980 datasheet. If a non-standard voltage is required, see LP2980-ADJ.
LP2980L
V
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Basic Application Circuit
10109103
LP2980L
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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
ON/OFF 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
IN
= 1 F, C
OUT
= 4.7 F, V
ON/OFF
= 2V.
Symbol
Parameter
Conditions
Typ
LP2980LVAI-XX
(Note 6)
LP2980LVI-XX
(Note 6)
Units
Min
Max
Min
Max
V
O
Output Voltage
Tolerance
I
L
= 1 mA
-0.50
0.50
-1.00
1.00
%V
NOM
1 mA
<
I
L
<
50 mA
-0.75
-2.50
0.75
2.50
-1.50
-3.50
1.50
-3.50
Output Voltage Line
Regulation
V
O(NOM)
+ 1V
V
IN
16V
0.007
0.014
0.032
0.014
0.032
%/V
I
GND
Ground Pin Current
I
L
= 0
65
85
110
85
110
A
I
L
= 1 mA
75
95
160
95
160
I
L
= 10 mA
120
175
325
175
325
I
L
= 50 mA
280
475
850
475
850
V
ON/OFF
<
0.18V
0
1
1
V
IN
(min)
Minimum input voltage
required to maintain
output regulation
I
L
= 50 mA
2.05
2.20
2.20
V
V
ON/OFF
ON/OFF Input Voltage
(Note 7)
High = O/P ON
1.4
1.6
1.6
V
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 Voltage
(RMS)
BW = 300 Hz to 50 kHz,
C
OUT
= 10 F
125
V
Ripple Rejection
f = 1kHz C
OUT
= 10 F
63
dB
I
O(MAX)
Short Circuit Current
R
L
= 0 (Steady State)
(Note 8)
150
mA
Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the
device outside of its rated operating conditions.
Note 2: The ESD rating of pins 3 and 4 is 1 kV.
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:
LP2980L
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Electrical Characteristics
(Continued)
The value of
JA
for the SOT-23 package is 220C/W. Exceeding the maximum allowable power dissipation will cause excessive 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 LP2980LV 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 and possibly damage the device (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: The ON/OFF input must be properly driven to prevent misoperation. For details, refer to Application Hints.
Note 8: See Typical Performance Characteristics curves.
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