The LM25088 high voltage non-synchronous buck controller features all the necessary functions to implement an efficient, high-voltage buck converter using the minimum number of external components. The LM25088 can be configured to operate over an ultra-wide input voltage range of 4.5 V to 42 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 on 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 LM25088 switching frequency is programmable from 50 kHz to 1 MHz.
The LM25088 is available in two versions: The LM25088-1 provides a ±5% frequency dithering function to reduce the conducted and radiated EMI while the LM25088-2 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 HTSSOP-16 pin package.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM25088, LM25088-Q1 Wide Input Range Non-Synchronous Buck Controllers datasheet (Rev. K) | PDF | HTML | 08 Jun 2022 |
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| Analog Design Journal | Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics | 21 Jul 2016 | ||
| EVM User's guide | AN-1931 LM25088 Evaluation Board (Rev. D) | 26 Apr 2013 | ||
| Application note | Improve Power Converter Reliability Using Hiccup-Mode Current Limiting | 11 May 2009 | ||
| Application note | Understanding and Applying Current-Mode Control Theory | 19 Aug 2007 | ||
| Application note | Emulatd Cur Mode Cntrl for Buck Regs Using Sample and Hold Technique | 21 Mar 2007 |
For additional terms or required resources, click any title below to view the detail page where available.
The LM25088-1 evaluation board is designed to provide the design engineer with a fully functional power converter based on Emulated Current Mode Control to evaluate the LM25088 controller IC. The LM25088 evaluation board is available in two versions (like the LM25088 controller): the LM25088-1 (...)
The LM25088-2 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 LM25088 controller): the LM25088-1 (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (PWP) | 16 | Ultra Librarian |
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