Datasheet
RoHS Compliance Information
| Size in Kbytes | Date |
 |
| LM3478/LM3478Q High Efficiency Low-Side N-Channel Controller for Switching Regulator |
495
Kbytes |
30-Mar-09 |
Download |
LM3478/LM3478Q High Efficiency Low-Side N-Channel Controller for Switching Regulator (Japanese)
 |
708 Kbytes |
|
 |
Package Availability, Models, Samples & Pricing
General Description
The LM3478 is a versatile Low-Side N-Channel MOSFET controller for switching regulators. It is suitable for use in topologies
requiring a low side MOSFET, such as boost, flyback, SEPIC, etc. Moreover, the LM3478 can be operated at extremely high switching
frequency in order to reduce the overall solution size. The switching frequency of the LM3478 can be adjusted to any value
between 100kHz and 1MHz by using a single external resistor. Current mode control provides superior bandwidth and transient
response, besides cycle-by-cycle current limiting. Output current can be programmed with a single external resistor.
The LM3478 has built in features such as thermal shutdown, short-circuit protection, over voltage protection, etc. 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) |
|
LM3478MM | ABCD150 | 0 | 34175 | 0 | 0 | 4234000 | 1 | 1201409060
|
|
LM3478MMX | ABCD150 | 0 | 34175 | 0 | 0 | 4234000 | 1 | 1201409060
|
|
LM3478QMM | ABCD150 | 0 | 34175 | 0 | 0 | 4234000 | 1 | 1201409060
|
|
LM3478QMMX | ABCD150 | 0 | 34175 | 0 | 0 | 4234000 | 1 | 1201409060
|
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 |
|
|
|
| Power Reference Design Library |
|
|
View |
|
|
| Article - Cascaded Converter Boosts LED-Drive Capability |
|
|
View |
|
|
Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-1286: Application Note 1286 Compensation For The LM3478 Boost Controller |
204
Kbytes |
19-May-09 |
Download |
AN-1286 (Japanese): Application Note 1286 Compensation For The LM3478 Boost Controller
 |
202 Kbytes |
|
|
AN-1286 (Chinese): Application Note 1286 Compensation For The LM3478 Boost Controller
|
368 Kbytes |
|
 |
| AN-1204: Application Note 1204 LM3478/LM3488 Evaluation Board |
218
Kbytes |
10-May-04 |
Download |
More Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-1149: Application Note 1149 Layout Guidelines for Switching Power Supplies |
248
Kbytes |
1-May-04 |
Download |
AN-1149 (Japanese): Application Note 1149 Layout Guidelines for Switching Power Supplies
|
90 Kbytes |
|
|
| AN-1193: Application Note 1193 LM3477 Evaluation Board |
248
Kbytes |
10-May-04 |
Download |
| AN-1381: Application Note 1381 LM3475 Evaluation Board |
457
Kbytes |
4-May-05 |
Download |
[Information as of 7-Nov-2009]
|
