NSC LM3490IM5-12, LM3490IM5X-5.0, LM3490IM5X-3.3, LM3490IM5X-12, LM3490IM5-5.0 Datasheet
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LM3490
100 mA, SOT-23, Quasi Low-Dropout Linear Voltage
Regulator with Logic-Controlled ON/OFF
June 1999
LM3490 100 mA, SOT-23, Quasi Low-Dropout Linear Voltage Regulator with Logic-Controlled
ON/OFF
General Description
The LM3490 is an integrated linear voltage regulator. It features operation from an input as high as 30V and a guaranteed maximumdropout of 1.2V at the full 100 mA load. Standard packaging for the LM3490 is the 5-lead SOT-23
package. A logic-controlled ON/OFF feature makes the
LM3490 ideal for powering subsystems ON and OFF as
needed.
The 5, 12, and 15V members of the LM3490 series are intended as tiny alternatives to industry standard LM78LXX
series and similar devices. The 1.2V quasi low dropout of
LM3490 series devices makes them a nice fit in many applications where the 2 to 2.5V dropout of LM78LXX series devices precludes their (LM78LXX series devices) use.
The LM3490 series features a 3.3V member. The SOT packaging and quasi low dropout features of the LM3490 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.
Typical Application Circuit
Key Specifications
n 30V maximum input for operation
n 1.2V guaranteed maximum dropout over full load and
temperature ranges
n 100 mA guaranteed 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
n 3.3, 5, 12, and 15V versions available
n Logic-controlled ON/OFF
n Packaged in the tiny 5-lead SOT-23 package
Applications
n Tiny alternative to LM78LXX series and similar devices
n Tiny 5V
n Post regulator for switching DC/DC converter
n Bias supply for analog circuits
±
5%to 3.3V, 100 mA converter
DS100071-2
Connection Diagram
DS100071-1
Top View
5-Lead, Molded-Plastic Small-Outline Transistor (SOT) Package
© 1999 National Semiconductor Corporation DS100071 www.national.com
SOT-23 Package
Package Code MA05B(Note 1)
Ordering Information
Output
Voltage
(V)
3.3 LM3490IM5-3.3 L78B 250 Units on Tape and Reel
3.3 LM3490IM5X-3.3 L78B 3k Units on Tape and Reel
5 LM3490IM5-5.0 L79B 250 Units on Tape and Reel
5 LM3490IM5X-5.0 L79B 3k Units on Tape and Reel
12 LM3490IM5-12 L80B 250 Units on Tape and Reel
12 LM3490IM5X-12 L80B 3k Units on Tape and Reel
15 LM3490IM5-15 L81B 250 Units on Tape and Reel
15 LM3490IM5X-15 L81B 3k Units on Tape and Reel
Order
Number
(Note 2)
Package
Marking
(Note 3)
Comments
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Absolute Maximum Ratings (Note 4)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
ESD (Note 7)
ON/OFF
All Other Pins
Distributors for availability and specifications.
Input Voltage (IN to GND) 35V
Voltage ON/OFF to GND
5.5V
Power Dissipation (Note 5) 400 mW
Junction Temp. (T
) (Note 5) +150˚C
J
Ambient Storage Temp. −65 to +150˚C
Operating Ratings (Note 4)
Maximum Input Voltage (IN to GND) 30V
Voltage ON/OFF to GND
Junction Temperature (T
Maximum Power Dissipation (Note 8) 300 mW
) −40 to +125˚C
J
Soldering Time, Temp. (Note 6)
Wave
Infrared
Vapor Phase
4sec., 260˚C
10sec., 240˚C
75sec., 219˚C
Electrical Characteristics
LM3490-3.3, LM3490-5.0
=
V
IN
pearing in boldface type apply over the entire junction temperature range for operation, −40 to +125˚C. (Notes 9, 10, 11)
+ 1.5V unless otherwise noted. Typicals and limits appearing in normal type apply for T
V
NOM
Nominal Output Voltage (V
) 3.3V 5.0V
NOM
Symbol Parameter Conditions Typical Limit Typical Limit
V
OUT
Output Voltage 1 mA ≤ I
≤ 100 mA 3.30
OUT
3.17
3.14
3.43
3.46
∆V
∆V
I
GND
Line Regulation V
OUT
Load Regulation 10 mA ≤ I
OUT
Ground Pin
Current
+ 1.5V ≤ VIN≤ 30V,
NOM
=
1mA
I
OUT
OUT
V
+ 1.5V ≤ VIN≤ 30V,
NOM
No Load
=
V
ON/OFF
5V
≤ 100 mA 15
7
25
40
22mA
44mA(max)
=
V
ON/OFF
0V
0.1 0.1 µA
55µA(max)
V
-
IN
V
OUT
Dropout Voltage I
=
10 mA 0.7
OUT
=
100 mA 0.9
I
OUT
0.9
1.0
1.1
1.2
e
n
V
IL
Output Noise
Voltage
Maximum Low
Level Input
=
V
10V,
IN
Bandwidth: 10 Hz to 100 kHz
100 150 µV
0.2 0.2 V(max)
Voltage at
ON/OFF
V
IH
Minimum High
Level Input
2.0 2.0 V(min)
Voltage at
ON/OFF
=
I
IL
I
IH
V
V
ON/OFF
ON/OFF
0V
=
5V
11µA
−1 −1 µA(max)
20 20 µA(max)
5.00
9
15
0.7
0.9
=
A
=
T
25˚C. Limits ap-
J
4.80
4.75
5.20
5.25
25
40
0.9
1.0
1.1
1.2
1.0kV
2.0kV
0to5V
Units
V
V(min)
V(min)
V(max)
V(max)
mV
mV(max)
mV
mV(max)
V
V(max)
V(max)
V
V(max)
V(max)
rms
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