Features Hermetic package for harsh operating environments Emulated peak current mode Wide operating range up to 100V Low IQ shutdown (< 10 µA) Drives standard or logic level MOSFETs Robust 3.5A peak gate drive Free-run or synchronous operation to 1 MHz 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

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

Datasheets

Title		Size	Date	Other Language
	LM5116WG Wide Range Synchronous Buck Controller	1180 Kbytes	9-Aug-11

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-1628: Application Note 1628 Minimizing FET Losses For a High Input Rail Buck Converter	91 Kbytes	5-Sep-07	日本語 中文
	AN-1713: Application Note 1713 LM5116-12 Evaluation Board	313 Kbytes	3-Oct-07

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM5116WG/NOPB RoHS Status	CERPACK	Full production Lead Time: 16 weeks	Contact your distributor	CALL	tray of N/A

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM5116WG.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM5116WG is located at RoHS Status.

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM5116WG/NOPB	634.885	CERPACK	20	1	NA	Detail	Download	N/A	NSUZXYTTE# LM5116WG

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM5116WG.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM5116WG is located at RoHS Status.

Design Tools

Title	Size	Date
Current Mode Modeling - Reference Guide
Understanding and Applying Current-Mode Control Theory
LM5116 Quick Start Component Calculator
Article - Hitchhiker's Ride to the World of Current Mode Control

CAD Symbols and Models Download LM5116WG CAD Symbols

Models N/A

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.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM5116WG.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM5116WG is located at RoHS Status.