The LM25019 is a 48-V, 100-mA synchronous step-down regulator with integrated high-side and low-side MOSFETs. The constant on-time (COT) control scheme employed in the LM25019 requires no loop compensation, provides excellent transient response, and enables very high step-down ratios. The on-time varies inversely with the input voltage resulting in nearly constant frequency over the input voltage range. A high-voltage start-up regulator provides bias power for internal operation of the IC and for integrated gate drivers.
A peak current limit circuit protects against overload conditions. The undervoltage lockout (UVLO) circuit allows the input undervoltage threshold and hysteresis to be independently programmed. Other protection features include thermal shutdown and bias supply undervoltage lockout.
The LM25019 is available in 8-pin WSON and 8-pin SO PowerPAD plastic packages.
| Documentación principal | Tipo | Título | Opciones de formato | Fecha |
|---|---|---|---|---|
| * | Data sheet | LM25019 48-V, 100-mA Constant On-Time Synchronous Buck / Fly-Buck™ Regulator datasheet (Rev. F) | PDF | HTML | 24 may 2021 |
| Product overview | Isolated Power Topologies for PLC I/O Modules and Other Low-Power Applications (Rev. A) | PDF | HTML | 20 ago 2024 | |
| Selection guide | Buck Converter Quick Reference Guide (Rev. B) | 08 abr 2021 | ||
| White paper | Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) | 10 abr 2019 | ||
| Technical article | Create a Fly-Buck™ converter in WEBENCH® Power Designer | PDF | HTML | 09 oct 2015 | |
| Analog Design Journal | Fly-Buck(TM) converter provides EMC and isolation in PLC applications | 29 ene 2015 | ||
| Application note | AN-2292 Designing an Isolated Buck (Fly-Buck) Converter (Rev. C) | 17 dic 2014 | ||
| Product overview | Fly-Buck™ Solution | 19 nov 2013 | ||
| User guide | LM5019 Buck Evaluation Board (Rev. A) | 30 abr 2013 |
Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.
This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.
| Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
| WSON (NGU) | 8 | Ultra Librarian |
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