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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 CPGA-20 high temperature ceramic package with the thermal shutdown feature disabled.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM5116WG Wide Range Synchronous Buck Controller datasheet (Rev. D) | 17 Mar 2013 | |
| EVM User's guide | AN-1596 LM5116 Evaluation Board (Rev. C) | 24 Apr 2013 | ||
| EVM User's guide | AN-1713 LM5116-12 Evaluation Board (Rev. A) | 24 Apr 2013 | ||
| Application note | Minimizing FET Losses For a High Input Rail Buck Converter (Rev. A) | 23 Apr 2013 |
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| CFP (NAR) | 20 | Ultra Librarian |
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