LM5088
- 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 75 V
- Low IQ shutdown and standby modes
- High duty cycle ratio feature for reduced dropout voltage
- Spread spectrum EMI reduction (LM5088-1)
- Hiccup timer for overload protection (LM5088-2)
- 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 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.
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 | LM5088, LM5088-Q1 Wide Input Range Non-Synchronous Buck Controller datasheet (Rev. J) | PDF | HTML | 2022/6/8 | ||
| 白皮書 | Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A) | 2019/4/10 | ||||
| 應用說明 | Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) | 2019/3/12 | ||||
| 類比設計期刊 | Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics | 2016/7/21 | ||||
| 技術文章 | Power Tips: Automotive EMI Series: Dithering? Not always a bad thing | PDF | HTML | 2016/2/10 | |||
| 應用說明 | Load Dump and Cranking Protection for Automotive Backlight LED Power Supply (Rev. A) | 2015/3/16 | ||||
| 應用說明 | Automated Frequency Response Analyzer | 2013/10/9 | ||||
| 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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LM5088MH-1EVAL — LM5088-1 - 具有抖動的寬輸入範圍非同步降壓控制器評估模組
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 (...)
LM5088MH-2EVAL — LM5088-2 - 具有打嗝模式重新啟動的寬輸入範圍非同步降壓控制器
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 (...)
LM25088-5088QUICK-CALC — LM(2)5088 快速入門計算機
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 16 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。