現在提供此產品的更新版本
功能相同，但針腳輸出與所比較的裝置不同。
LM25088-Q1
- AEC-Q100 qualified with the following results:
- Device temperature grade 1: –40°C to +125°C ambient operating temperature range
- Device HBM ESD classification level 2
- Device CDM ESD classification level C5
- Emulated current mode control
- Drives external high-side N-channel MOSFET
- Ultra-wide input voltage range from 4.5 V to 42 V
- Low IQ shutdown and standby modes
- High duty cycle ratio feature for reduced dropout voltage
- Spread spectrum EMI reduction (LM25088-1)
- Hiccup timer for overload protection (LM25088-2)
- Adjustable output voltage from 1.205 V with 1.5% feedback reference accuracy
- Wide bandwidth error amplifier
- Single resistor oscillator frequency setting
- Oscillator synchronization capability
- Programmable soft start
- High voltage, low dropout bias regulator
- Thermal shutdown protection
- 16-pin HTSSOP package
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.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LM25088, LM25088-Q1 Wide Input Range Non-Synchronous Buck Controllers datasheet (Rev. K) | PDF | HTML | 2022/6/8 | ||
| 類比設計期刊 | Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics | 2016/7/21 | ||||
| 應用說明 | Improve Power Converter Reliability Using Hiccup-Mode Current Limiting | 2009/5/11 |
設計與開發
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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 (...)
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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 (...)
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 16 | Ultra Librarian |