LM3880-Q1
- Qualified for automotive applications
- AEC-Q100 qualified with the following results:
- Device temperature grade: –40°C to 125°C junction uemperature range
- Simple solution for sequencing three voltage rails from a single input signal
- Easily cascade up to three devices to sequence as many as nine voltage rails
- Powerup and powerdown control
- Tiny 2.9-mm x 1.6-mm footprint
- Low quiescent current: 25 µA
- Input voltage range: 2.7 V to 5.5 V
- Standard timing options available
The LM3880-Q1 simple power supply sequencer offers the easiest method to control powerup sequencing and powerdown sequencing of multiple Independent voltage rails. By staggering the startup sequence, it is possible to avoid latch conditions or large in-rush currents that can affect the reliability of the system.
Available in a 6-pin SOT-23 package, the simple sequencer contains a precision enable pin and three open-drain output flags. The open-drain output flags permit that they can be pulled up to distinct voltage supplies separate from the sequencer VDD (only if they do not exceed the recommended maximum voltage of 0.3 V greater than VDD), so as to interface with ICs requiring a range of different enable signals. When the LM3880-Q1 is enabled, the three output flags sequentially release, after individual time delays, thus permitting the connected power supplies to start up. The output flags follow a reverse sequence during power down to avoid latch conditions.
EPROM capability allows every delay and sequence to be fully adjustable. Contact Texas Instruments to request a non-standard configuration.
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 | LM3880-Q1 Simple Power Sequencer datasheet (Rev. A) | PDF | HTML | 2021/2/26 | ||
| 技術文章 | The need for sequencing in automotive applications | PDF | HTML | 2018/1/30 | |||
| 技術文章 | Improving DDR Memory Performance in Automotive Applications | PDF | HTML | 2017/6/22 | |||
| 類比設計期刊 | Power-supply sequencing for FPGAs | 2014/10/24 | ||||
| 應用說明 | LM1771 and LM3880 Based FPGA Power Supply Reference Design (Rev. A) | 2013/5/5 | ||||
| 應用說明 | AN-1603 LM274X Reference Designs (Rev. C) | 2013/5/1 | ||||
| 應用說明 | Power Supply Design Considerations for Modern FPGAs (Power Designer 121) | 2010/2/2 |
設計與開發
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LM3880EVAL — 電源序列器
The LM3880 evaluation board has been designed to connect directly to the power supplies of an existing system to enable sequencing. Upon enabling the device, the three open drain output flags will rise in sequential order, 1-2-3. Once the part is disabled, the shutdown sequence will occur in (...)
TIDA-00346 — 適用於入門級核心應用處理器架構 ADAS 系統的成本最佳化電源供應器解決方案
TIDA-00346 設計可為汽車先進駕駛輔助系統 (ADAS) 應用中的典型入門級應用處理器提供所需的電源軌。 此設計使用數個獨立 DC/DC 電壓穩壓器，以及負載開關與線性穩壓器 (LDO)，為系統單晶片 (SoC) 的處理核心與其他功能提供固定電源電壓。也會實作適用於 DDR 記憶體電源和終端與 CAN 收發器的額外軌。兩個 LM3880 簡單的電源序列器可提供開機和關機排序。 此設計針對汽車應用進行最佳化，並可在 4V 至 18V（瞬態高達 40V）的輸入電壓下運作。
TIDA-00530 — 適用於低功耗 TDA3x 系統的車用電源參考設計
該解決方案旨在利用汽車電池輸入，為使用 TDA3x SoC 的 ADAS 應用打造一體整合、尺寸最佳化的電源設計。 透過只將處理需求較低的應用作為目標，我們可以選擇比使用高效能處理器的系統中更小的裝置和元件。
TIDA-00803 — 適用於前置攝影機系統且採用單核電壓應用處理器的車用電源設計
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-23 (DBV) | 6 | Ultra Librarian |