LP2986
Micropower, 200 mA Ultra Low-Dropout Fixed or
Adjustable Voltage Regulator
General Description
The LP2986 is a 200 mA precision LDO voltage regulator
which offers the designer a higher performance version of
the industry standard LP2951.
Using an optimized VIP
TM
(Vertically Integrated PNP) pro-
cess, the LP2986 delivers superior performance:
Dropout Voltage: Typically 180 mV
@
200 mA load, and 1
mV
@
1 mA load.
Ground Pin Current: Typically 1 mA
@
200 mA load, and
200 A
@
10 mA load.
Sleep Mode: The LP2986 draws less than 1 A 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: The standard product versions available
can be pin-strapped (using the internal resistive divider) to
provide output voltages of 5.0V, 3.3V, or 3.0V with guaran-
teed accuracy of 0.5% ("A" grade) and 1% (standard grade)
at room temperature.
Features
n
Ultra low dropout voltage
n
Guaranteed 200 mA output current
n
SO-8 and mini-SO8 surface mount packages
n
<
1 A quiescent current when shutdown
n
Low ground pin current at all loads
n
0.5% output voltage accuracy ("A" grade)
n
High peak current capability (400 mA typical)
n
Wide supply voltage range (16V max)
n
Overtemperature/overcurrent protection
n
-40C to +125C junction temperature range
Applications
n
Cellular Phone
n
Palmtop/Laptop Computer
n
Camcorder, Personal Stereo, Camera
Block Diagram
VIP
TM
is a trademark of National Semiconductor Corporation.
DS012935-1
March 1999
LP2986
Micropower
,
200
mA
Ultra
Low-Dropout
Fixed
or
Adjustable
V
oltage
Regulator
1999 National Semiconductor Corporation
DS012935
www.national.com
Connection Diagram and Ordering Information
Basic Application Circuits
Surface Mount Packages:
Mini SO-8 Package Type MM: See NS Package Drawing Number MUA08A
SO-8 Package Type M: See NS Package Drawing Number M08A
DS012935-2
Top View
For ordering information, refer to Table 1 of this document.
Application Using Internal Resistive Divider
DS012935-3
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2
Basic Application Circuits
(Continued)
Ordering Information
TABLE 1. Package Marking and Ordering Information
Output Voltage
Grade
Order Information
Package Marking
Supplied as:
5
A
LP2986AIMMX-5.0
L41A
3.5k Units on Tape and Reel
5
A
LP2986AIMM-5.0
L41A
250 Units on Tape and Reel
5
STD
LP2986IMMX-5.0
L41B
3.5k Units on Tape and Reel
5
STD
LP2986IMM-5.0
L41B
250 Units on Tape and Reel
3.3
A
LP2986AIMMX-3.3
L40A
3.5k Units on Tape and Reel
3.3
A
LP2986AIMM-3.3
L40A
250 Units on Tape and Reel
3.3
STD
LP2986IMMX-3.3
L40B
3.5k Units on Tape and Reel
3.3
STD
LP2986IMM-3.3
L40B
250 Units on Tape and Reel
3.0
A
LP2986AIMMX-3.0
L39A
3.5k Units on Tape and Reel
3.0
A
LP2986AIMM-3.0
L39A
250 Units on Tape and Reel
3.0
STD
LP2986IMMX-3.0
L39B
3.5k Units on Tape and Reel
3.0
STD
LP2986IMM-3.0
L39B
250 Units on Tape and Reel
5
A
LP2986AIMX-5.0
2986AIM5.0
2.5k Units on Tape and Reel
5
A
LP2986AIM-5.0
2986AIM5.0
Shipped in Anti-Static Rails
5
STD
LP2986IMX-5.0
2986IM5.0
2.5k Units on Tape and Reel
5
STD
LP2986IM-5.0
2986IM5.0
Shipped in Anti-Static Rails
3.3
A
LP2986AIMX-3.3
2986AIM3.3
2.5k Units on Tape and Reel
3.3
A
LP2986AIM-3.3
2986AIM3.3
Shipped in Anti-Static Rails
3.3
STD
LP2986IMX-3.3
2986IM3.3
2.5k Units on Tape and Reel
3.3
STD
LP2986IM-3.3
2986IM3.3
Shipped in Anti-Static Rails
3.0
A
LP2986AIMX-3.0
2986AIM3.0
2.5k Units on Tape and Reel
3.0
A
LP2986AIM-3.0
2986AIM3.0
Shipped in Anti-Static Rails
3.0
STD
LP2986IMX-3.0
2986IM3.0
2.5k Units on Tape and Reel
3.0
STD
LP2986IM-3.0
2986IM3.0
Shipped in Anti-Static Rails
Application Using External Divider
DS012935-4
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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 seconds)
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 Pin
-0.3V to +16V
Feedback Pin
-0.3V to +5V
Output Voltage
(Survival) (Note 4)
-0.3V to +16V
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
= 4.7 F, C
IN
= 2.2 F, V
S/D
= 2V.
Symbol
Parameter
Conditions
Typical
LM2986AI-X.X
(Note 6)
LM2986I-X.X
(Note 6)
Units
Min
Max
Min
Max
V
O
Output Voltage
(5.0V Versions)
5.0
4.975
5.025
4.950
5.050
V
0.1 mA
<
I
L
<
200 mA
5.0
4.960
5.040
4.920
5.080
4.910
5.090
4.860
5.140
Output Voltage
(3.3V Versions)
3.3
3.283
3.317
3.267
3.333
0.1 mA
<
I
L
<
200 mA
3.3
3.274
3.326
3.247
3.353
3.241
3.359
3.208
3.392
Output Voltage
(3.0V Versions)
3.0
2.985
3.015
2.970
3.030
0.1 mA
<
I
L
<
200 mA
3.0
2.976
3.024
2.952
3.048
2.946
3.054
2.916
3.084
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
(Note 7)
I
L
= 100 A
1
2.0
2.0
mV
3.5
3.5
I
L
= 75 mA
90
120
120
170
170
I
L
= 200 mA
180
230
230
350
350
I
GND
Ground Pin Current
I
L
= 100 A
100
120
120
A
150
150
I
L
= 75 mA
500
800
800
1400
1400
I
L
= 200 mA
1
2.1
2.1
mA
3.7
3.7
V
S/D
<
0.3V
0.05
1.5
1.5
A
I
O
(PK)
Peak Output Current
V
OUT
V
O
(NOM) - 5%
400
250
250
mA
I
O
(MAX)
Short Circuit Current
R
L
= 0 (Steady State)
(Note 11)
400
e
n
Output Noise Voltage
(RMS)
BW = 300 Hz to 50
kHz, C
OUT
= 10 F
160
V(RMS)
Ripple Rejection
f = 1 kHz, C
OUT
= 10 F
65
dB
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4
Electrical Characteristics
(Continued)
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
= 4.7 F, C
IN
= 2.2 F, V
S/D
= 2V.
Symbol
Parameter
Conditions
Typical
LM2986AI-X.X
(Note 6)
LM2986I-X.X
(Note 6)
Units
Min
Max
Min
Max
Output Voltage
Temperature Coefficient
(Note 9)
20
ppm/C
FEEDBACK PIN
V
FB
Feedback Pin Voltage
1.23
1.21
1.25
1.20
1.26
V
1.20
1.26
1.19
1.27
(Note 10)
1.23
1.19
1.28
1.18
1.29
FB Pin Voltage
Temperature Coefficient
(Note 9)
20
ppm/C
I
FB
Feedback Pin Bias
Current
I
L
= 200 mA
150
330
330
nA
760
760
FB Pin Bias Current
Temperature Coefficient
(Note 9)
0.1
nA/C
SHUTDOWN INPUT
V
S/D
S/D Input Voltage
(Note 8)
V
H
= O/P ON
1.4
1.6
1.6
V
V
L
= O/P OFF
0.55
0.18
0.18
I
S/D
S/D Input Current
V
S/D
= 0
0
-1
-1
A
V
S/D
= 5V
5
15
15
ERROR COMPARATOR
I
OH
Output "HIGH" Leakage
V
OH
= 16V
0.01
1
1
A
2
2
V
OL
Output "LOW" Voltage
V
IN
= V
O
(NOM) - 0.5V,
I
O
(COMP) = 300 A
150
220
220
mV
350
350
V
THR
(MAX)
Upper Threshold
Voltage
-4.6
-5.5
-3.5
-5.5
-3.5
%V
OUT
-7.7
-2.5
-7.7
-2.5
V
THR
(MIN)
Lower Threshold
Voltage
-6.6
-8.9
-4.9
-8.9
-4.9
-13.0
-3.3
-13.0
-3.3
HYST
Hysteresis
2.0
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 the Feedback pin is 500V and the Tap pin is 1.5 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,
J-A
,
and the ambient temperature, T
A
. The maximum allowable power dissipation at any ambient temperature is calculated using:
The value of
J-A
for the SO-8 (M) package is 160C/W, and the mini SO-8 (MM) package is 200C/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 LM2986 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. Forcing the output above the input will turn
on this diode and may induce a latch-up mode which can damage the part (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: To prevent mis-operation, the Shutdown input must be driven by a signal that swings above V
H
and below V
L
with a slew rate not less than 40 mV/s (see
Application Hints).
Note 9: Temperature coefficient is defined as the maximum (worst-case) change divided by the total temperature range.
Note 10: V
FB
V
OUT
(V
IN
- 1), 2.5V
V
IN
16V, 100 A
I
L
200 mA, T
J
125C.
Note 11: See Typical Performance Characteristics curves.
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5
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