Features • Hermetic package for harsh operating environments • Emulated peak current mode • Wide operating range up to 100V • Low IQ shutdown (<10µA) • Drives standard or logic level MOSFETs • Robust 3.5A peak gate drive • Free-run or synchronous operation to 1MHz • Optional diode emulation mode • Programmable output from 1.215V to 80V • Precision 1.5% voltage reference • Programmable current limit • Programmable soft-start • Programmable line under-voltage lockout • Automatic switch to external bias supply • CERPACK-20 with no thermal shutdown 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.

Also Recommended LM25116▲ 42V Input Voltage Max LM5116▲ 100V Input TSSOP-20EP LM5118 Buck-Boost MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application click for larger image	Connection Diagram click for larger image
Typical Performance click for larger image

Datasheet

Title		Size	Date	Other Language
	LM5116WG Wide Range Synchronous Buck Controller	1160 Kbytes	8-Dec-08

Featured Application Notes

Title		Size	Date	Other Language
	AN-1596: Application Note 1596 LM5116 Evaluation Board	299 Kbytes	18-May-07
	AN-1617: Application Note 1617 LM25116 Evaluation Board	314 Kbytes	10-Apr-07
	AN-1713: Application Note 1713 LM5116-12 Evaluation Board	313 Kbytes	3-Oct-07
	AN-1628: Application Note 1628 Minimizing FET Losses For a High Input Rail Buck Converter	91 Kbytes	5-Sep-07	日本語 中文

More Application Notes

Title		Size	Date	Other Language
	AN-1368: Application Note 1368 LM5115/5025A Evaluation Board	1364 Kbytes	5-Apr-05
	AN-1367: Application Note 1367 LM5115 HV DC Evaluation Board	943 Kbytes	18-Oct-05	中文
	AN-1875: Application Note 1875 LM5073HE Evaluation Board With Active Bridge	230 Kbytes	2-Jul-08
	AN-1574: Application Note 1574 LM5073 Evaluation Board	464 Kbytes	24-Apr-07

Design Tools

Title	Size	Date
Current Mode Modeling - Reference Guide	1372 Kbytes	1-Aug-2007
LM5116 Quick Start Component Calculator	362 Kbytes	25-Feb-2008
Understanding and Applying Current-Mode Control Theory	427 Kbytes	8-Jan-2008
Article - Hitchhiker's Ride to the World of Current Mode Control

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.