Datasheet
Package Availability, Models, Samples & Pricing
General Description
The LM3151/2/3 SIMPLE SWITCHER
® Controller is an easy to use and simplified step down power controller capable of providing up to 12A of output current in
a typical application. Operating with an input voltage range from 6V-42V, the LM3151/2/3 features a fixed output voltage of
3.3V, and features switching frequencies of 250 kHz, 500 kHz, and 750 kHz. The synchronous architecture provides for highly
efficient designs. The LM3151/2/3 controller employs a Constant On-Time (COT) architecture with a proprietary Emulated Ripple
Mode (ERM) control that allows for the use of low ESR output capacitors, which reduces overall solution size and output voltage
ripple. The Constant On-Time (COT) regulation architecture allows for fast transient response and requires no loop compensation,
which reduces external component count and reduces design complexity.
Fault protection features such as thermal shutdown, under-voltage lockout, over-voltage protection, short-circuit protection,
current limit, and output voltage pre-bias startup allow for a reliable and robust solution.
The LM3151/2/3 SIMPLE SWITCHER
® concept provides for an easy to use complete design using a minimum number of external components and National’s WEBENCH
® online design tool. WEBENCH
® provides design support for every step of the design process and includes features such as external component calculation
with a new MOSFET selector, electrical simulation, thermal simulation, and Build-It boards for prototyping.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
|
LM3153MH-3.3 | ABCD5 | 0 | 5364 | 0 | 0 | 1626984 | 3 | 461661152
|
|
LM3153MHE-3.3 | ABCD5 | 0 | 5364 | 0 | 0 | 1626984 | 3 | 461661152
|
|
LM3153MHX-3.3 | 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 |
 |
|
|
| Downloadable LM315x Quick Start Simple Switcher Controller Component Calculator |
1861 Kbytes |
20-Oct-2008 |
View |
|
|
| Article - Emulated Ripple Technique Advances Hysteretic Switchmode Supplies |
|
|
View |
|
|
Reference Designs
Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-1229: Application Note 1229 SIMPLE SWITCHER PCB Layout Guidelines |
229
Kbytes |
1-May-04 |
Download |
AN-1229 (Japanese): Application Note 1229 SIMPLE SWITCHER PCB Layout Guidelines
 |
304 Kbytes |
|
 |
AN-1229 (Chinese): Application Note 1229 SIMPLE SWITCHER PCB Layout Guidelines
|
668 Kbytes |
|
 |
| AN-1481: Application Note 1481 Controlling Output Ripple and Achieving ESR Independence in Constant On-Time (COT) Regulator Designs |
574
Kbytes |
27-Sep-06 |
Download |
AN-1481 (Japanese): Application Note 1481 Controlling Output Ripple and Achieving ESR Independence in Constant On-Time (COT) Regulator Designs
|
220 Kbytes |
|
|
AN-1481 (Chinese): Application Note 1481 Controlling Output Ripple and Achieving ESR Independence in Constant On-Time (COT) Regulator Designs
|
421 Kbytes |
|
|
More Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-1900: Application Note 1900 LM3150 Evaluation Boards |
626
Kbytes |
14-Oct-08 |
Download |
[Information as of 7-Nov-2009]
|
RoHS Compliance Information
