LM5116 Wide Range Synchronous Buck Controller
February 2007
LM5116 Wide Range Synchronous Buck Controller
General Description
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.
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