The LM5088 high voltage non-synchronous buck controller features all the necessary functions to implement an efficient, high-voltage buck converter using a minimum number of external components. The LM5088 can be configured to operate over an ultra-wide input voltage range of 4.5 V to 75 V. This easy-to-use controller includes a level-shifted gate driver capable of controlling an external N-channel buck switch. The control method is based upon peak current mode control utilizing an emulated current ramp. 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 and low output voltage applications. The LM5088 switching frequency is programmable from 50 kHz to 1 MHz.
The LM5088 is available in two versions: The LM5088-1 provides a ±5% frequency dithering function to reduce the conducted and radiated EMI, while the LM5088-2 provides a versatile restart timer for overload protection. Additional features include a low dropout bias regulator, tri-level enable input to control shutdown and standby modes, soft start, and oscillator synchronization capability. The device is available in a thermally enhanced 16-pin HTSSOP package.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM5088, LM5088-Q1 Wide Input Range Non-Synchronous Buck Controller datasheet (Rev. J) | PDF | HTML | 08 Jun 2022 |
| White paper | Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) | 10 Apr 2019 | ||
| Analog Design Journal | Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics | 21 Jul 2016 | ||
| Technical article | Power Tips: Automotive EMI Series: Dithering? Not always a bad thing | PDF | HTML | 10 Feb 2016 | |
| Application note | Load Dump and Cranking Protection for Automotive Backlight LED Power Supply (Rev. A) | 16 Mar 2015 | ||
| Application note | Automated Frequency Response Analyzer | 09 Oct 2013 | ||
| EVM User's guide | AN-1913 LM5088 Evaluation Board (Rev. E) | 30 Apr 2013 | ||
| Application note | Improve Power Converter Reliability Using Hiccup-Mode Current Limiting | 11 May 2009 |
For additional terms or required resources, click any title below to view the detail page where available.
The LM5088-1 evaluation board is designed to provide the design engineer with a fully functional power converter based on Emulated Current Mode Control to evaluate the LM5088 controller IC. The LM5088 evaluation board is available in two versions (like the LM5088 controller): the LM5088-1 (...)
The LM5088-2 evaluation board is designed to provide the design engineer with a fully functional power converter based on Emulated Current Mode Control to evaluate the LM5088 controller IC. The LM5088 evaluation board is available in two versions (like the LM5088 controller): the LM5088-1 (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (PWP) | 16 | Ultra Librarian |
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