LM3490IM5X-3.3 National Semiconductor, LM3490IM5X-3.3 Datasheet

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LM3490IM5X-3.3

Manufacturer Part Number
LM3490IM5X-3.3
Description
100 mA, SOT-23, Quasi Low-Dropout Linear Voltage Regulator with Logic-Controlled ON/OFF
Manufacturer
National Semiconductor
Datasheet

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© 2007 National Semiconductor Corporation
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.
Typical Application Circuit
Connection Diagram
5-Lead, Molded-Plastic Small-Outline Transistor (SOT) Package
100071
Package Code MF05A(Note 1)
SOT-23 Package
Top View
Key Specifications
Features
Applications
10007101
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
3.3, 5, 12, and 15V versions available
Logic-controlled ON/OFF
Packaged in the tiny 5-lead SOT-23 package
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
10007102
www.national.com
June 2007

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LM3490IM5X-3.3 Summary of contents

Page 1

... Typical Application Circuit Connection Diagram 5-Lead, Molded-Plastic Small-Outline Transistor (SOT) Package © 2007 National Semiconductor Corporation Key Specifications ■ 30V maximum input for operation ■ 1.2V guaranteed maximum dropout over full load and temperature ranges ■ ...

Page 2

... Ordering Information Output Voltage (V) LM3490IM5-3.3 3.3 LM3490IM5X-3.3 LM3490IM5-5.0 5.0 LM3490IM5X-5.0 LM3490IM5-12 12 LM3490IM5X-12 LM3490IM5-15 15 LM3490IM5X-15 www.national.com Order Package Number Marking (Note 2) (Note 3) L78B L78B L79B L79B L80B L80B L81B L81B 2 Comments 1000 Units on Tape and Reel 3000 Units on Tape and Reel 1000 Units on Tape and Reel ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Input Voltage (IN to GND) Voltage ON/OFF to GND Power Dissipation (Note 5) Junction Temp (Note 5) J Ambient Storage Temp. Electrical Characteristics LM3490-3.3, LM3490-5.0 ...

Page 4

... IH ON/OFF Note 1: The package code MA05B 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 “M5” indicates the die is packaged in the 5-lead SOT-23 package. The suffix “ ...

Page 5

A θ of 250°C/W represents the worst-case condition of no heat sinking of the 5-lead plastic SOT-23 package. Heat sinking enables JA the dissipation of more power during operation. Note 9: A typical is the ...

Page 6

Typical Performance Characteristics C = 0.1 µF, and T =25°C. OUT A . Dropout Voltage vs Load Current Ground Pin Current vs Input Voltage Ground Pin Current vs Load Current www.national.com Unless indicated otherwise, V Dropout Voltage vs Junction Temperature ...

Page 7

Input Current vs Input Voltage 10007111 Line Transient Response 10007103 Load Transient Response 10007105 Input Current vs Input Voltage Line Transient Response Load Transient Response 7 10007112 10007104 10007106 www.national.com ...

Page 8

Load Transient Response Output Voltage vs Input Voltage Output Voltage vs Input Voltage www.national.com Load Transient Response 10007107 vs Input Voltage 10007113 vs Input Voltage 10007115 8 10007108 Output Voltage 10007114 Output Voltage 10007116 ...

Page 9

Output Short- Circuit Current 10007117 Power Supply Rejection Ratio 10007124 DC Load Regulation 10007123 Output Short- Circuit Current Power Supply Rejection Ratio 9 10007118 10007125 www.national.com ...

Page 10

Applications Information ON/OFF Pin The LM3490 features a logic controlled ON/OFF pin that will allow the output voltage to be disabled, or enabled, as need- ed. The defined operating voltage range for this pin is 0.0V to 5.0V. The ON/OFF ...

Page 11

Physical Dimensions inches (millimeters) unless otherwise noted For Ordering, Refer to Ordering Information Table SOT-23 Package 5-Lead Small-Outline Package (M5) NS Package Number MF05A 11 www.national.com ...

Page 12

... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...

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