Datasheet
Package Availability, Models, Samples & Pricing
General Description
The LM5116 is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying
input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control
provides inherent line feed-forward, cycle by cycle current limiting and ease of loop compensation. The use of an emulated
control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty
cycles necessary in high input voltage applications. The operating frequency is programmable from 50kHz to 1MHz. The LM5116
drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diode emulation
mode enables discontinuous mode operation for improved efficiency at light load conditions. A low quiescent current shutdown
disables the controller and consumes less than 10µA of total input current. Additional features include a high voltage bias
regulator, automatic switch-over to external bias for improved efficiency, thermal shutdown, frequency synchronization, cycle
by cycle current limit and adjustable line under-voltage lockout. The device is available in a power enhanced TSSOP-20 package
featuring an exposed die attach pad to aid thermal dissipation.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
|
LM5116MH | ABCD150XV2 | 0 | 3601 | 0 | 0 | 1155496 | 4 | 327875145
|
|
LM5116MHX | ABCD150XV2 | 0 | 3601 | 0 | 0 | 1155496 | 4 | 327875145
|
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 |
|
| LM5116 Quick Start Component Calculator |
362 Kbytes |
25-Feb-2008 |
View |
|
|
| Understanding and Applying Current-Mode Control Theory |
427 Kbytes |
8-Jan-2008 |
View Online |
Download |
|
| Article - Hitchhiker's Ride to the World of Current Mode Control |
|
|
View |
|
|
Application Notes
| Title | Size in Kbytes |
Date |
|
| AN-1596: Application Note 1596 LM5116 Evaluation Board |
299
Kbytes |
18-May-07 |
Download |
| AN-1713: Application Note 1713 LM5116-12 Evaluation Board |
313
Kbytes |
3-Oct-07 |
Download |
| AN-1628: Application Note 1628 Minimizing FET Losses For a High Input Rail Buck Converter |
91
Kbytes |
5-Sep-07 |
Download |
AN-1628 (Japanese): Application Note 1628 Minimizing FET Losses For a High Input Rail Buck Converter
 |
115 Kbytes |
|
 |
AN-1628 (Chinese): Application Note 1628 Minimizing FET Losses For a High Input Rail Buck Converter
|
283 Kbytes |
|
 |
| AN-1617: Application Note 1617 LM25116 Evaluation Board |
314
Kbytes |
10-Apr-07 |
Download |
[Information as of 7-Nov-2009]
|
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