Datasheet
RoHS Compliance Information
| Size in Kbytes | Date |
 |
| LM3481 High Efficiency Low-Side N-Channel Controller for Switching Regulators |
449
Kbytes |
16-Nov-07 |
Download |
LM3481 High Efficiency Low-Side N-Channel Controller for Switching Regulators (Japanese)
 |
637 Kbytes |
|
 |
Package Availability, Models, Samples & Pricing
General Description
The LM3481 is a versatile Low-Side N-FET high performance controller for switching regulators. It is suitable for use in topologies
requiring a low-side FET, such as boost, flyback, SEPIC, etc. The LM3481 can be operated at extremely high switching frequencies
in order to reduce the overall solution size. The switching frequency of the LM3481 can be adjusted to any value between 100
kHz and 1 MHz by using a single external resistor or by synchronizing it to an external clock. Current mode control provides
superior bandwidth and transient response in addition to cycle-by-cycle current limiting. Current limit can be programmed
with a single external resistor.
The LM3481 has built in protection features such as thermal shutdown, short-circuit protection and over voltage protection.
Power saving shutdown mode reduces the total supply current to 5µA and allows power supply sequencing. Internal soft-start
limits the inrush current at start-up.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
|
LM3481MM | ABCD5 | 0 | 5364 | 0 | 0 | 1626984 | 3 | 461661152
|
|
LM3481MMX | ABCD5 | 0 | 5364 | 0 | 0 | 1626984 | 3 | 461661152
|
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click here.
Design Tools
| Title | Size in Kbytes |
Date |
|
|
|
| Current Mode Modeling - Reference Guide |
1372 Kbytes |
1-Aug-2007 |
View Online |
Download |
|
| Understanding and Applying Current-Mode Control Theory |
427 Kbytes |
8-Jan-2008 |
View Online |
Download |
|
| "Article - How to supply, load, and test power-management circuits Part 1" |
|
|
View |
|
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| Article - Supplying and Loading of Power Management Circuits Part 3 |
|
|
View |
|
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Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-1756: Application Note 1756 LM3481 Evaluation Board |
505
Kbytes |
30-Apr-08 |
Download |
AN-1756 (Japanese): Application Note 1756 LM3481 Evaluation Board
 |
461 Kbytes |
|
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More Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-1204: Application Note 1204 LM3478/LM3488 Evaluation Board |
218
Kbytes |
10-May-04 |
Download |
[Information as of 7-Nov-2009]
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