LP2982
Micropower 50 mA Ultra Low-Dropout Regulator
General Description
The LP2982 is a 50 mA, fixed-output voltage regulator de-
signed to provide ultra low dropout and lower noise in battery
powered applications.
Using an optimized VIP
TM
(Vertically Integrated PNP) pro-
cess, the LP2982 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 absolute minimum board space.
Precision Output: 1.0% tolerance output voltages available
(A grade).
Low Noise: By adding an external bypass capacitor, output
noise can be reduced to 30 V (typical).
Ten output voltage versions, from 2.5V to 5.0V, are available
as standard products.
Features
n
Ultra low dropout voltage
n
Guaranteed 50 mA output current
n
Typical dropout voltage 180 mV
@
80 mA
n
Smallest possible size (SOT-23, micro SMD package)
n
Requires minimum external components
n
<
1 A quiescent current when shutdown
n
Low ground pin current at all loads
n
Output voltage accuracy 1.0% (A Grade)
n
High peak current capability (150 mA typical)
n
Wide supply voltage range (16V max)
n
Low Z
OUT
0.3
typical (10 Hz to 1 MHz)
n
Overtemperature/overcurrent protection
n
-40C to +125C junction temperature range
n
Custom voltages available
Applications
n
Cellular Phone
n
Palmtop/Laptop Computer
n
Personal Digital Assistant (PDA)
n
Camcorder, Personal Stereo, Camera
Block Diagram
VIP
TM
is a trademark of National Semiconductor Corporation.
DS012679-1
March 2000
LP2982
Micropower
50
mA
Ultra
Low-Dropout
Regulator
2000 National Semiconductor Corporation
DS012679
www.national.com
Connection Diagrams
Basic Application Circuit
5-Lead Small Outline Package (M5)
DS012679-3
Top View
See NS Package Number MF05A
For ordering information see
Table 1
micro SMD, 5 Bump Package (BPA05)
DS012679-55
Bottom View
See NS Package Number BPA05
DS012679-2
*
ON/OFF input must be actively terminated. Tie to V
IN
if this function is not to be used.
**
Minimum capacitance is shown to insure stability over full load current range. More capacitance provides superior dynamic performance (see Application
Hints).
***
See Application Hints.
LP2982
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2
Ordering Information
TABLE 1. Package Marking and Ordering Information
Output Voltage
(V)
Grade
Order Information
Package
Marking
Supplied as:
5-Lead Small Outline Package (M5)
2.5
A
LP2982AIM5X-2.5
L58A
3000 Units on Tape and Reel
2.5
A
LP2982AIM5-2.5
L58A
1000 Units on Tape and Reel
2.5
STD
LP2982IM5X-2.5
L58B
3000 Units on Tape and Reel
2.5
STD
LP2982IM5-2.5
L58B
1000Units on Tape and Reel
2.6
A
LP2982AIM5X-2.6
LBYA
3000 Units on Tape and Reel
2.6
A
LP2982AIM5-2.6
LBYA
1000 Units on Tape and Reel
2.6
STD
LP2982IM5X-2.6
LBYB
3000 Units on Tape and Reel
2.6
STD
LP2982IM5-2.6
LBYB
1000Units on Tape and Reel
2.8
A
LP2982AIM5X-2.8
L60A
3000 Units on Tape and Reel
2.8
A
LP2982AIM5-2.8
L60A
1000 Units on Tape and Reel
2.8
STD
LP2982IM5X-2.8
L60B
3000 Units on Tape and Reel
2.8
STD
LP2982IM5-2.8
L60B
1000 Units on Tape and Reel
3.0
A
LP2982AIM5X-3.0
L20A
3000 Units on Tape and Reel
3.0
A
LP2982AIM5-3.0
L20A
1000 Units on Tape and Reel
3.0
STD
LP2982IM5X-3.0
L20B
3000 Units on Tape and Reel
3.0
STD
LP2982IM5-3.0
L20B
1000 Units on Tape and Reel
3.3
A
LP2982AIM5X-3.3
L19A
3000 Units on Tape and Reel
3.3
A
LP2982AIM5-3.3
L19A
1000 Units on Tape and Reel
3.3
STD
LP2982IM5X-3.3
L19B
3000 Units on Tape and Reel
3.3
STD
LP2982IM5-3.3
L19B
1000 Units on Tape and Reel
3.6
A
LP2982AIM5X-3.6
L0BA
3000 Units on Tape and Reel
3.6
A
LP2982AIM5-3.6
L0BA
1000 Units on Tape and Reel
3.6
STD
LP2982IM5X-3.6
L0BB
3000 Units on Tape and Reel
3.6
STD
LP2982IM5-3.6
L0BB
1000 Units on Tape and Reel
3.8
A
LP2982AIM5X-3.8
L76A
3000 Units on Tape and Reel
3.8
A
LP2982AIM5-3.8
L76A
1000 Units on Tape and Reel
3.8
STD
LP2982IM5X-3.8
L76B
3000 Units on Tape and Reel
3.8
STD
LP2982IM5-3.8
L76B
1000 Units on Tape and Reel
4.0
A
LP2982AIM5X-4.0
L29A
3000 Units on Tape and Reel
4.0
A
LP2982AIM5-4.0
L29A
1000 Units on Tape and Reel
4.0
STD
LP2982IM5X-4.0
L29B
3000 Units on Tape and Reel
4.0
STD
LP2982IM5-4.0
L29B
1000 Units on Tape and Reel
4.5
A
LP2982AIM5X-4.5
LA8A
3000 Units on Tape and Reel
4.5
A
LP2982AIM5-4.5
LA8A
1000 Units on Tape and Reel
4.5
STD
LP2982IM5X-4.5
LA8B
3000 Units on Tape and Reel
4.5
STD
LP2982IM5-4.5
LA8B
1000 Units on Tape and Reel
4.7
A
LP2982AIM5X-4.7
L0HA
3000 Units on Tape and Reel
4.7
A
LP2982AIM5-4.7
L0HA
1000 Units on Tape and Reel
4.7
STD
LP2982IM5X-4.7
L0HB
3000 Units on Tape and Reel
4.7
STD
LP2982IM5-4.7
L0HB
1000 Units on Tape and Reel
5.0
A
LP2982AIM5X-5.0
L18A
3000 Units on Tape and Reel
5.0
A
LP2982AIM5-5.0
L18A
1000 Units on Tape and Reel
5.0
STD
LP2982IM5X-5.0
L18B
3000 Units on Tape and Reel
5.0
STD
LP2982IM5-5.0
L18B
1000 Units on Tape and Reel
5.3
A
LP2982AIM5X-5.3
LBZA
3000 Units on Tape and Reel
LP2982
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3
Ordering Information
(Continued)
TABLE 1. Package Marking and Ordering Information (Continued)
Output Voltage
(V)
Grade
Order Information
Package
Marking
Supplied as:
5-Lead Small Outline Package (M5)
5.3
A
LP2982AIM5-5.3
LBZA
1000 Units on Tape and Reel
5.3
STD
LP2982IM5X-5.3
LBZB
3000 Units on Tape and Reel
5.3
STD
LP2982IM5-5.3
LBZB
1000 Units on Tape and Reel
micro SMD, 5 Bump Package (BPA05)
2.8
A
LP2982AIBP-2.8
250 Units on Tape and Reel
2.8
A
LP2982AIBPX-2.8
3000 Units on Tape and Reel
2.8
STD
LP2982IBP-2.8
250 Units on Tape and Reel
2.8
STD
LP2982IBPX-2.8
3000 Units on Tape and Reel
3.0
A
LP2982AIBP-3.0
250 Units on Tape and Reel
3.0
A
LP2982AIBPX-3.0
3000 Units on Tape and Reel
3.0
STD
LP2982IBP-3.0
250 Units on Tape and Reel
3.0
STD
LP2982IBPX-3.0
3000 Units on Tape and Reel
LP2982
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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
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
IN
= 1 F, C
OUT
= 4.7 F, V
ON/OFF
= 2V.
Symbol
Parameter
Conditions
Typ
LP2982AI-X.X
LP2982I-X.X
Units
(Note 6)
(Note 6)
Min
Max
Min
Max
V
O
Output Voltage
Tolerance
I
L
= 1 mA
-1.0
+1.0
-1.5
+1.5
%V
NOM
1 mA
<
I
L
<
50 mA
-1.5
+1.5
-2.0
+2.0
-2.0
+2.0
-3.5
+3.5
Output Voltage Line
Regulation
V
O(NOM)
+ 1V
V
IN
16V
0.007
0.014
0.014
%/V
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
<
0.3V
0.01
0.8
0.8
V
ON/OFF
<
0.15V
0.10
2.0
2.0
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
0.15
0.15
I
ON/OFF
ON/OFF Input Current
V
ON/OFF
= 0
0.01
-2
-2
A
V
ON/OFF
= 5V
5
15
15
I
O(PK)
Peak Output Current
V
OUT
V
O(NOM)
- 5%
150
100
100
mA
V
IN
V
O
Dropout Voltage
I
L
= 80 mA
180
225
225
mV
325
325
I
GND
Ground Pin Current
I
L
= 80 mA
525
750
750
A
1400
1400
e
n
Output Noise Voltage
(RMS)
BW = 300 Hz50 kHz,
C
OUT
= 10 F
C
BYPASS
= 0.01 F
30
V
LP2982
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