Datasheet
Package Availability, Models, Samples & Pricing
General Description
The LM5116WG 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 50 kHz to 1 MHz. The
LM5116WG 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 10 µA of total input current. Additional features include a high voltage
bias regulator, automatic switch-over to external bias for improved efficiency, frequency synchronization, cycle by cycle
current limit and adjustable line under-voltage lockout. The device is available in a CERPACK-20 high temperature ceramic
package with the thermal shutdown feature disabled.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
|
LM5116WG | 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-1617: Application Note 1617 LM25116 Evaluation Board |
314
Kbytes |
10-Apr-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 |
|
 |
[Information as of 8-Nov-2009]
|
RoHS Compliance Information