LM5116 Datasheet

Wide Range Synchronous Buck Controller


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 50 kHz to 1 MHz. The LM5116 drives external high-side and low-side NMOS power switches with adaptive deadtime 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 &mu;A 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 HTSSOP-20 package featuring an exposed die attach pad to aid thermal dissipation. LM5116 Features &bull; Emulated Peak Current Mode&bull; Wide Operating Range Up to 100V&bull; Low IQ Shutdown (< 10 &mu;A)&bull; Drives Standard or logic Level MOSFETs&bull; Robust 3.5A Peak Gate Drive&bull; Free-run or Synchronous Operation to 1 MHz&bull; Optional Diode Emulation Mode&bull; Programmable Output from 1.215V to 80V&bull; Precision 1.5% Voltage Reference&bull; Programmable Current Limit&bull; Programmable Soft-Start&bull; Programmable Line Under-Voltage lockout&bull; Automatic Switch to External Bias Supply&bull; HTSSOP-20EP Exposed Pad&bull; Thermal Shutdown


[{"Name":"Input Voltage","Value":"6 V to 100 V"},{"Name":"Output Voltage","Value":"1.215 V to 80 V "},{"Name":"Output Current","Value":"3.5 A"},{"Name":"Number of Outputs","Value":"1 "},{"Name":"Maximum Operating Temperature","Value":"+ 125 C "},{"Name":"Minimum Operating Temperature","Value":"- 40 C "},{"Name":"","Value":""},{"Name":"","Value":""},{"Name":"","Value":""},{"Name":"","Value":""}]

Manufacturer information


Diodes Incorporated is a leading global manufacturer and supplier of high-quality, application-specific, standard products within the broad discrete, logic and analog semiconductor markets. Diodes Incorporated primarily serves the computing, consumer, communications, industrial and automotive segments. Diodes’ diverse product portfolio includes parts for LCD/LED TVs and displays, desktop, notebook and tablet computing, smartphones and hand-held devices, set-top boxes, power supplies and USB protection as well as many other application areas.

Diodes Incorporated offers a wide array of products including diodes, rectifiers, transistors, MOSFETs, gate drivers, protection devices, function-specific arrays, amplifiers and comparators, Hall-effect sensors and temperature sensors, power management devices including LED drivers, AC-DC converters and controllers, DC-DC switching regulators, linear voltage regulators, current monitors, and voltage reference and shunt regulators, along with special function devices including USB power switches, load switch devices, voltage supervisors and motor controllers.

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