LM3490_07 Datasheet, PDF (1/12 Pages) National Semiconductor (TI) – 100 mA, SOT-23, Quasi Low-Dropout Linear Voltage Regulator with Logic-Controlled ON/OFF

June 2007
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 fea-
tures operation from an input as high as 30V and a guaran-
teed maximum dropout 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 need-
ed.
The 5, 12, and 15V members of the LM3490 series are in-
tended 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 appli-
cations 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 pack-
aging 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.
Key Specifications
■ ^{30V maximum input for operation}
■ ^{1.2V guaranteed maximum dropout over full load and}
temperature ranges
■ ^{100 mA guaranteed load current}
■ ^{±5% guaranteed output voltage tolerance over full load}
and temperature ranges
■ ^{−40 to +125°C junction temperature range for operation}
Features
■ ^{3.3, 5, 12, and 15V versions available}
■ ^{Logic-controlled ON/OFF}
■ ^{Packaged in the tiny 5-lead SOT-23 package}
Applications
■ ^{Tiny alternative to LM78LXX series and similar devices}
■ ^{Tiny 5V±5% to 3.3V, 100 mA converter}
■ ^{Post regulator for switching DC/DC converter}
■ ^{Bias supply for analog circuits}
Typical Application Circuit
Connection Diagram
10007102
10007101
Top View
SOT-23 Package
5-Lead, Molded-Plastic Small-Outline Transistor (SOT) Package
Package Code MF05A(Note 1)
© 2007 National Semiconductor Corporation 100071
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