SNVSB79B November 2018 – May 2020 LM25180
The LM25180 requires only a few external components to convert from a wide range of supply voltages to one or more isolated output rails. To expedite and streamline the process of designing of a LM25180-based converter, a comprehensive LM25180 quick-start calculator is available for download to assist the designer with component selection for a given application. WEBENCH® online software is also available to generate complete designs, leveraging iterative design procedures and access to comprehensive component databases. The following sections discuss the design procedure for both single- and dual-output implementations using specific circuit design examples.
As mentioned previously, the LM25180 also integrates several optional features to meet system design requirements, including precision enable, input UVLO, programmable soft start, output voltage thermal compensation, and external bias supply connection. Each application incorporates these features as needed for a more comprehensive design.
The application circuits detailed in Typical Applications show LM25180 configuration options suitable for several application use cases. Refer to the LM5180EVM-S05 and LM5180EVM-DUAL EVM user's guides for more detail.