Datasheet
Package Availability, Models, Samples & Pricing
General Description
The LM5118 wide voltage range Buck-Boost switching regulator controller features all of the functions necessary to implement
a high performance, cost efficient Buck-Boost regulator using a minimum of external components. The Buck-Boost topology maintains
output voltage regulation when the input voltage is either less than or greater than the output voltage making it especially
suitable for automotive applications. The LM5118 operates as a buck regulator while the input voltage is sufficiently greater
than the regulated output voltage and gradually transitions to the buck-boost mode as the input voltage approaches the output.
This dual mode approach maintains regulation over a wide range of input voltages with optimal conversion efficiency in the
buck mode and a glitch-free output during mode transitions. This easy to use controller includes drivers for the high side
buck MOSFET and the low side boost MOSFET. The regulator’s control method is based upon current mode control utilizing an
emulated current ramp. Emulated current mode control reduces noise sensitivity of the pulse-width modulation circuit, allowing
reliable control of the very small duty cycles necessary in high input voltage applications. Additional protection features
include current limit, thermal shutdown and an enable input. 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) |
|
LM5118MH | ABCD150XV1 | 0 | 3868 | 0 | 0 | 2595000 | 2 | 736338335
|
|
LM5118MHX | ABCD150XV1 | 0 | 3868 | 0 | 0 | 2595000 | 2 | 736338335
|
|
LM5118Q1MH | ABCD150XV1 | 0 | 3868 | 0 | 0 | 2595000 | 2 | 736338335
|
|
LM5118Q1MHX | ABCD150XV1 | 0 | 3868 | 0 | 0 | 2595000 | 2 | 736338335
|
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 |
 |
|
|
| LM5118 Quick Start Component Calculator |
247 Kbytes |
23-Jun-2008 |
View |
|
|
Application Notes
| Title | Size in Kbytes |
Date |
 |
| AN-1819: Application Note 1819 LM5118 Evaluation Board |
390 Kbytes |
30-Apr-08 |
Download |
More Application Notes
| Title | Size in Kbytes |
Date |
 |
| AN-1368: Application Note 1368 LM5115/5025A Evaluation Board |
1364 Kbytes |
5-Apr-05 |
Download |
| AN-1713: Application Note 1713 LM5116-12 Evaluation Board |
313 Kbytes |
3-Oct-07 |
Download |
| AN-1367: Application Note 1367 LM5115 HV DC Evaluation Board |
943 Kbytes |
18-Oct-05 |
Download |
AN-1367 (Chinese): Application Note 1367 LM5115 HV DC Evaluation Board
|
614 Kbytes |
|
 |
| AN-1596: Application Note 1596 LM5116 Evaluation Board |
299 Kbytes |
18-May-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 7-Nov-2009]
|