LM3480
LM3480 100 mA, SOT-23, Quasi Low-Dropout Linear Voltage Regulator
Literature Number: SNVS011D
LM3480
100 mA, SOT-23, Quasi Low-Dropout Linear Voltage
Regulator
General Description
The LM3480 is an integrated linear voltage regulator. It
features operation from an input as high as 30V and a
guaranteed maximum dropout of 1.2V at the full 100 mA
load. Standard packaging for the LM3480 is the 3-lead Su-
perSOT®package.
The 5, 12, and 15V members of the LM3480 series are
intended as tiny alternatives to industry standard LM78LXX
series and similar devices. The 1.2V quasi low dropout of
LM3480 series devices makes them a nice fit in many appli-
cations where the 2 to 2.5V dropout of LM78LXX series
devices precludes their (LM78LXX series devices) use.
The LM3480 series features a 3.3V member. The SOT pack-
aging and quasi low dropout features of the LM3480 series
converge in this device to provide a very nice, very tiny 3.3V,
100 mA bias supply that regulates directly off the system
5V±5% power supply.
Key Specifications
n30V maximum input for operation
n1.2V guaranteed maximum dropout over full load and
temperature ranges
n100 mA guaranteed minimum load current
n±5% guaranteed output voltage tolerance over full load
and temperature ranges
n−40 to +125˚C junction temperature range for operation
Features
n3.3, 5, 12, and 15V versions available
nPackaged in the tiny 3-lead SuperSOT package
Applications
nTiny alternative to LM78LXX series and similar devices
nTiny 5V±5% to 3.3V, 100 mA converter
nPost regulator for switching DC/DC converter
nBias supply for analog circuits
Typical Application Circuit
10007002
Connection Diagram
10007001
Top View
SOT-23 Package
3-Lead, Molded-Plastic Small-Outline Transistor (SOT) Package
Package Code MF03A (Note 1)
SuperSOT ®is a registered trademark of National Semiconductor.
March 2005
LM3480 100 mA, SOT-23, Quasi Low-Dropout Linear Voltage Regulator
© 2005 National Semiconductor Corporation DS100070 www.national.com
Ordering Information
Output
Voltage
(V)
Order
Number
(Note 2)
Package
Marking
(Note 3)
Comments
3.3 LM3480IM3-3.3 L0A 1000 Units on Tape and Reel
3.3 LM3480IM3X-3.3 L0A 3000 Units on Tape and Reel
5 LM3480IM3-5.0 L0B 1000 Units on Tape and Reel
5 LM3480IM3X-5.0 L0B 3000 Units on Tape and Reel
12 LM3480IM3-12 L0C 1000 Units on Tape and Reel
12 LM3480IM3X-12 L0C 3000Units on Tape and Reel
15 LM3480IM3-15 L0D 1000 Units on Tape and Reel
15 LM3480IM3X-15 L0D 3000 Units on Tape and Reel
LM3480
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Absolute Maximum Ratings (Note 4)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Input Voltage (IN to GND) 35V
Power Dissipation (Note 5) 333mW
Junction Temp. (Note 5) +150˚C
Ambient Storage Temp. −65 to +150˚C
Soldering Time, Temp. (Note 6)
Wave
Infrared
Vapor Phase
4 sec., 260˚C
10 sec., 240˚C
75 sec., 219˚C
ESD (Note 7) 2kV
Operating Ratings (Note 4)
Max. Input Voltage (IN to GND) 30V
Junction Temp. (T
J
) −40 to +125˚C
Max. Power Dissipation (Note 8) 250mW
Electrical Characteristics
LM3480-3.3, LM3480-5.0
Typicals and limits appearing in normal type apply for T
A
=T
J
= 25˚C. Limits appearing in boldface type apply over the entire
junction temperature range for operation, −40 to +125˚C. (Notes 9, 10, 11)
Nominal Output Voltage (V
NOM
) 3.3V 5.0V Units
Symbol Parameter Conditions Typical Limit Typical Limit
V
OUT
Output Voltage V
IN
=V
NOM
+ 1.5V,
1mA≤I
OUT
≤100 mA
3.30
3.17
3.14
3.43
3.46
5.00
4.80
4.75
5.20
5.25
V
V(min)
V(min)
V(max)
V(max)
∆V
OUT
Line Regulation V
NOM
+ 1.5V ≤V
IN
≤30V,
I
OUT
=1mA
10
25
12
25
mV
mV(max)
∆V
OUT
Load Regulation V
IN
=V
NOM
+ 1.5V,
10 mA ≤I
OUT
≤100 mA
20
40
20
40
mV
mV(max)
I
GND
Ground Pin
Current
V
NOM
+ 1.5V ≤V
IN
≤30V,
No Load
2
4
2
4
mA
mA(max)
V
IN
-
V
OUT
Dropout Voltage I
OUT
=10mA 0.7
0.9
1.0
0.7
0.9
1.0
V
V(max)
V(max)
I
OUT
= 100 mA 0.9
1.1
1.2
0.9
1.1
1.2
V
V(max)
V(max)
e
n
Output Noise
Voltage
V
IN
= 10V,
Bandwidth: 10 Hz to 100 kHz
100 150 µV
rms
LM3480
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Electrical Characteristics (Continued)
LM3480-12, LM3480-15
Typicals and limits appearing in normal type apply for T
A
=T
J
= 25˚C. Limits appearing in boldface type apply over the entire
junction temperature range for operation, −40 to +125˚C. (Notes 9, 10, 11)
Nominal Output Voltage (V
NOM
) 12V 15V Units
Symbol Parameter Conditions Typical Limit Typical Limit
V
OUT
Output Voltage V
IN
=V
NOM
+ 1.5V,
1mA≤I
OUT
≤100 mA
12.00
11.52
11.40
12.48
12.60
15.00
14.40
14.25
15.60
15.75
V
V(min)
V(min)
V(max)
V(max)
∆V
OUT
Line Regulation V
NOM
+ 1.5V ≤V
IN
≤30V,
I
OUT
=1mA
14
40
16
40
mV
mV(max)
∆V
OUT
Load Regulation V
IN
=V
NOM
+ 1.5V,
10 mA ≤I
OUT
≤100 mA
36
60
45
75
mV
mV(max)
I
GND
Ground Pin
Current
V
NOM
+ 1.5V ≤V
IN
≤30V,
No Load
2
4
2
4
mA
mA(max)
V
IN
-
V
OUT
Dropout Voltage I
OUT
=10mA 0.7
0.9
1.0
0.7
0.9
1.0
V
V(max)
V(max)
I
OUT
= 100 mA 0.9
1.1
1.2
0.9
1.1
1.2
V
V(max)
V(max)
e
n
Output Noise
Voltage
V
IN
= 10V,
Bandwidth: 10 Hz to 100 kHz
360 450 µV
rms
Note 1: The package code MA03B is internal to National Semiconductor Corporation and indicates a specific version of the SOT-23 package and associated
mechanical drawings.
Note 2: The suffix “I” indicates the junction temperature range for operation is the industrial temperature range, −40 to +125˚C. The suffix “M3” indicates the die is
packaged in the 3-lead SOT-23 package. The suffix “X” indicates the devices will be supplied in blocks of 3k units as opposed to blocks of 250 units.
Note 3: Because the entire part number does not fit on the SOT-23 package, the SOT-23 package is marked with this code instead of the part number.
Note 4: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device
is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the Electrical
Characteristics tables.
Note 5: The Absolute Maximum power dissipation depends on the ambient temperature and can be calculated using P = (TJ-T
A)/θJA where TJis the junction
temperature, TAis the ambient temperature, and θJA is the junction-to-ambient thermal resistance. The 333 mW rating results from substituting the Absolute
Maximum junction temperature, 150˚C, for TJ, 50˚C for TA, and 300˚C/W for θJA. More power can be safely dissipated at lower ambient temperatures. Less power
can be safely dissipated at higher ambient temperatures. The Absolute Maximum power dissipation can be increased by 3.33 mW for each ˚C below 50˚C ambient.
It must be derated by 3.33 mW for each ˚C above 50˚C ambient. A θJA of 300˚C/W represents the worst-case condition of no heat sinking of the 3-lead plastic SOT-23
package. Heat sinking enables the safe dissipation of more power. The LM3480 actively limits its junction temperature to about 150˚C.
Note 6: Times shown are dwell times. Temperatures shown are dwell temperatures. For detailed information on soldering plastic small-outline packages, refer to
the Packaging Databook available from National Semiconductor Corporation.
Note 7: For testing purposes, ESD was applied using the human-body model, a 100 pF capacitor discharged through a 1.5 kΩresistor.
Note 8: As with the Absolute Maximum power dissipation, the maximum power dissipation for operation depends on the ambient temperature. The 250 mW rating
appearing under Operating Ratings results from substituting the maximum junction temperature for operation, 125˚C, for TJ, 50˚C for TA, and 300˚C/W for θJA in
P=(T
J-T
A)/θJA. More power can be dissipated at lower ambient temperatures. Less power can be dissipated at higher ambient temperatures. The maximum power
dissipation for operation appearing under Operating Ratings can be increased by 3.33 mW for each ˚C below 50˚C ambient. It must be derated by 3.33 mW for each
˚C above 50˚C ambient. A θJA of 300˚C/W represents the worst-case condition of no heat sinking of the 3-lead plastic SOT-23 package. Heat sinking enables the
dissipation of more power during operation.
Note 9: A typical is the center of characterization data taken with TA=T
J= 25˚C. Typicals are not guaranteed.
Note 10: All limits are guaranteed. All electrical characteristics having room-temperature limits are tested during production with TA=T
J= 25˚C. All hot and cold
limits are guaranteed by correlating the electrical characteristics to process and temperature variations and applying statistical process control.
Note 11: All voltages except dropout are with respect to the voltage at the GND pin.
LM3480
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Typical Performance Characteristics
Unless indicated otherwise, V
IN
=V
NOM
+ 1.5V, C
IN
= 0.1
µF, C
OUT
= 0.1 µF, and T
A.
=25˚C.
Dropout Voltage
vs Load Current
Dropout Voltage
vs Junction Temperature
10007019 10007020
Ground Pin Current
vs Input Voltage
Ground Pin Current
vs Input Voltage
10007009 10007010
LM3480
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Typical Performance Characteristics Unless indicated otherwise, V
IN
=V
NOM
+ 1.5V, C
IN
= 0.1 µF,
COUT = 0.1 µF, and T
A.
=25˚C. (Continued)
Ground Pin Current
vs Load Current
Ground Pin Current
vs Junction Temperature
10007021 10007022
Input Current
vs Input Voltage
Input Current
vs Input Voltage
10007011 10007012
LM3480
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Typical Performance Characteristics Unless indicated otherwise, V
IN
=V
NOM
+ 1.5V, C
IN
= 0.1 µF,
COUT = 0.1 µF, and T
A.
=25˚C. (Continued)
Line Transient Response Line Transient Response
10007003 10007004
Load Transient Response Load Transient Response
10007005 10007006
Load Transient Response Load Transient Response
10007007 10007008
LM3480
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Typical Performance Characteristics Unless indicated otherwise, V
IN
=V
NOM
+ 1.5V, C
IN
= 0.1 µF,
COUT = 0.1 µF, and T
A.
=25˚C. (Continued)
Output Voltage
vs Input Voltage
Output Voltage
vs Input Voltage
10007013 10007014
Output Voltage
vs Input Voltage
Output Voltage
vs Input Voltage
10007015 10007016
LM3480
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Typical Performance Characteristics Unless indicated otherwise, V
IN
=V
NOM
+ 1.5V, C
IN
= 0.1 µF,
COUT = 0.1 µF, and T
A.
=25˚C. (Continued)
Output Short-
Circuit Current
Output Short-
Circuit Current
10007017 10007018
Power Supply
Rejection Ratio
Power Supply
Rejection Ratio
10007024 10007025
LM3480
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Typical Performance Characteristics Unless indicated otherwise, V
IN
=V
NOM
+ 1.5V, C
IN
= 0.1 µF,
COUT = 0.1 µF, and T
A.
=25˚C. (Continued)
DC Load
Regulation
10007023
LM3480
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Physical Dimensions inches (millimeters)
unless otherwise noted
SOT-23 Package
3-Lead Small-Outline Package (M3)
For Ordering, Refer to Ordering Information Table
NS Package Number MF03A
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves
the right at any time without notice to change said circuitry and specifications.
For the most current product information visit us at www.national.com.
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LM3480 100 mA, SOT-23, Quasi Low-Dropout Linear Voltage Regulator
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